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Results All animals developed CHF after 2—4 weeks of pacing. Impedance diminished gradually during CHF induction, but at varying rates for different vectors. The LVr-Can vector reflected both the fastest and largest change in impedance in comparison to vectors employing only right-heart electrodes, and was highly reflective of changes in LV end-diastolic volume and LA pressure. Conclusions Impedance , acquired via different lead-electrodes, have variable responses to CHF. Measuring multiple impedance signals could be useful for optimizing ambulatory monitoring in heart failure patients.
Total body composition estimated by standing-posture 8-electrode bioelectrical impedance analysis in male wrestlers. Forty-eight Taiwanese male wrestlers aged from Assessment of adult body composition using bioelectrical impedance : comparison of researcher calculated to machine outputted values. To explore the usefulness of Bioelectrical Impedance Analysis BIA for general use by identifying best-evidenced formulae to calculate lean and fat mass, comparing these to historical gold standard data and comparing these results with machine-generated output.
In addition, we explored how to best to adjust lean and fat estimates for height and how these overlapped with body mass index BMI. Cross-sectional observational study within population representative cohort study. Urban community, North East England Sample of mothers of children aged years, mean age Height, weight, bioelectrical impedance BIA. Lean and fat mass calculated using best-evidenced published formulae as well as machine-calculated lean and fat mass data.
Estimates of lean mass were similar to historical results using gold standard methods. When compared with the machine-generated values, there were wide limits of agreement for fat mass and a large relative bias for lean that varied with size. Objectives To explore the usefulness of Bioelectrical Impedance Analysis BIA for general use by identifying best-evidenced formulae to calculate lean and fat mass, comparing these to historical gold standard data and comparing these results with machine-generated output. Design Cross-sectional observational study within population representative cohort study.
Measures Height, weight, bioelectrical impedance BIA. Outcome measures Lean and fat mass calculated using best-evidenced published formulae as well as machine-calculated lean and fat mass data. Results Estimates of lean mass were similar to historical results using gold standard methods. Prediction of beef carcass salable yield and trimmable fat using bioelectrical impedance analysis. Bioelectrical impedance technology BIA is capable of providing an objective method of beef carcass yield estimation with the rapidity of yield grading.
Carcasses were subsequently fabricated into salable beef products reflective of industry standards. These results indicate that BIA technology is an accurate predictor of beef carcass composition. Copyright Elsevier Ltd. Field comparison of body composition techniques: hydrostatic weighing, skinfold thickness, and bioelectric impedance. Body composition and appropriate playing weight are frequently requested by coaches. Numerous methods for estimating these figures are available, and each has its own limitation, be it technical or biological. A comparison of three common methods was made-underwater weighting H2O, the criterion , skinfold thicknesses SF , and commercial bioelectrical impedance analysis BIA.
Subjects were 29 professional football players measured by each of the three methods after an overnight fast. Data was collected 10 weeks preceding the players' formal training camp. There was no difference for percentage of weight as fat between SF Bioelectrical impedance analysis significantly p [Abdomen specific bioelectrical impedance analysis BIA methods for evaluation of abdominal fat distribution]. Two novel bioelectrical impedance analysis BIA methods have been developed recently for evaluation of intra-abdominal fat accumulation.
Both methods use electrodes that are placed on abdominal wall and allow evaluation of intra-abdominal fat area IAFA easily without radiation exposure. Dual BIA method measures impedance of trunk and body surface at the abdominal level and calculates BIA-IAFA from transverse and antero-posterior diameters of the abdomen and the impedance of trunk and abdominal surface. This paper evaluates the nutritional status in patients with mild-moderate and severe Alzheimer's disease AD by bioelectrical impedance vector analysis BIVA.
Cross-sectional study. Alzheimer Center, SS. Bioelectrical impedance analysis BIA is a widely used method for estimating body composition, yet issues concerning its validity persist in the literature. Percent BF values measured…. The primary purpose of this study was to investigate the accuracy of the DF50 ImpediMed Ltd, Eight Mile Plains, Queensland, Australia bioelectrical impedance analysis device using dual-energy x-ray absorptiometry as the criterion in two groups: endurance athletes and power athletes.
The secondary purpose was to develop accurate body fat…. Bioelectrical impedance analysis and anthropometry in Ecuadorian children of African ancestry. In the city of Esmeraldas, north-western coast of Ecuador, height, weight, and body composition of male and female schoolchildren of African ancestry in the age groups four, five and six years were investigated.
All the children were apparently healthy without any obvious or reported pathologies and in accordance with data from personal information were assigned to one of two socio-economic classes. The greater values for weight and height shown by children in the higher socio-economic group than in the less well off are compatible with those for more fat and water as obtained by the BIA investigation. Additional information on nutritional, muscular and general health status was obtained from positioning and degree of dispersion of the 'Biagram' ellipses.
It seems that both the anthropometric and the bioelectrical impedance methods provide useful information on the differences due to belonging to one or other of the socio-economic groups. Validation of bioelectrical-impedance analysis as a measurement of change in body composition in obesity.
The bioelectrical-impedance -analysis BIA method accurately measures body composition in weight-stable subjects. This study validates the use of BIA to measure change in body composition. Twelve obese females underwent weight loss at a mean rate of 1. Overall, BIA predicted change in fat-free mass with greater accuracy to 0. We conclude that BIA is a useful clinical method for measuring change in body composition.
In , the National Institutes of Health NIH convened a Technology Assessment Conference "to provide physicians with a responsible assessment of bioelectrical impedance analysis BIA technology for body composition measurement. Panel members presented reviews based on their own work and published studies for the intervening years.
Updates were provided on the single and multifrequency BIA methods and models; continued clinical research experiences; efforts toward establishing population reference norms; and the feasibility of establishing guidelines for potential diagnostic use of BIA in a clinical setting. This report provides a summary of the panel's findings including a consensus on several technical and clinical issues related to the research use of BIA, and those areas that are still in need of additional study.
Body composition of collegiate football players: bioelectrical impedance and skinfolds compared to hydrostatic weighing. The need for simple, valid techniques of body composition assessment among athletes is a growing concern of the physical therapist. This paper reports on several common methods applied to university football players. Clinicians should exercise caution when using BIA based on the existing manufacturers' equations with athletic populations. Adjustments to BIA regression equations by including modifying or anthropometric variables could enhance the predictive accuracy of these methods with lean, athletic males.
J Orthop Sports Phys Ther ;15 4 Drug and bioactive molecule screening based on a bioelectrical impedance cell culture platform. This review will present a brief discussion on the recent advancements of bioelectrical impedance cell-based biosensors, especially the electric cell-substrate impedance sensing ECIS system for screening of various bioactive molecules. The different technical integrations of various chip types, working principles, measurement systems, and applications for drug targeting of molecules in cells are highlighted in this paper.
Screening of bioactive molecules based on electric cell-substrate impedance sensing is a trial-and-error process toward the development of therapeutically active agents for drug discovery and therapeutics. In general, bioactive molecule screening can be used to identify active molecular targets for various diseases and toxicity at the cellular level with nanoscale resolution. In the innovation and screening of new drugs or bioactive molecules, the activeness, the efficacy of the compound, and safety in biological systems are the main concerns on which determination of drug candidates is based.
Further, drug discovery and screening of compounds are often performed in cell-based test systems in order to reduce costs and save time. Moreover, this system can provide more relevant results in in vivo studies, as well as high-throughput drug screening for various diseases during the early stages of drug discovery. Recently, MEMS technologies and integration with image detection techniques have been employed successfully. These new technologies and their possible ongoing transformations are addressed.
Select reports are outlined, and not all the work that has been performed in the field of drug screening and development is covered. The present work aimed to study the relationship of trunk fat and the visceral fat index, and other anthropometric indices in relation to the metabolic syndrome in middle aged male Methods: design: transversal descriptive and correlational study. Weight, height, body mass index, waist circumference, gluteal circumference, waist-to-hip ratio, waist-to-height ratio, trunk fat and visceral fat level by bioelectrical abdominal impedance analysis with Tanita AB ViScan and biochemical markers: fasting glucose, total cholesterol, and triglycerides.
Likewise, the systolic and diastolic blood pressure was measured. Receptor-operator curves ROC curve analysis shows that the cutoff points from which arises the metabolic syndrome are In the condition of the overweight, trunk fat and visceral fat level are more predictive than anthropometric measures. Lipid and moisture content modeling of amphidromous Dolly Varden using bioelectrical impedance analysis.
The physiological well-being or condition of fish is most commonly estimated from aspects of individual morphology. However, these metrics may be only weakly correlated with nutritional reserves stored as lipid, the primary form of accumulated energy in fish. We constructed and evaluated bioelectrical impedance analysis BIA models as an alternative method of assessing condition in amphidromous Dolly Varden Salvelinus malma collected from nearshore estuarine and lotic habitats of the Alaskan Arctic.
Data on electrical resistance and reactance were collected from the lateral and ventral surfaces of fish, and whole-body percent lipid and moisture content were determined using standard laboratory methods. Significant inverse relationships between temperature and resistance and reactance prompted the standardization of these data to a constant temperature using corrective equations developed herein. No significant differences in resistance or reactance were detected among spawning and nonspawning females after accounting for covariates, suggesting that electrical pathways do not intersect the gonads.
Best-fit BIA models incorporating electrical variables calculated from the lateral and ventral surfaces produced the strongest associations between observed and model-predicted estimates of proximate content. While additional research is required to address the potential effects of methodological variation, bioelectrical impedance analysis shows promise as a way to provide high-quality, minimally invasive estimates of Dolly Varden lipid or moisture content in the field with only small increases in handling time. Does bioelectrical impedance analysis accurately estimate the condition of threatened and endangered desert fish species?
Bioelectrical impedance analysis BIA is a nonlethal tool with which to estimate the physiological condition of animals that has potential value in research on endangered species. However, the effectiveness of BIA varies by species, the methodology continues to be refined, and incidental mortality rates are unknown. Derived BIA measurements were included in the best models for most proximate components; however, the added value of BIA as a predictor was marginal except in the absence of accurate wet-mass data.
Simulated field conditions indicated that BIA models became increasingly better than morphometric models at estimating proximate composition as the observation error around wet-mass measurements increased. However, since the overall proportion of variance explained by percentage-based models was low and BIA was mostly a redundant predictor, we caution against the use of BIA in field applications for these sensitive fish species.
The relationship between nocturnal polyuria and the distribution of body fluid: assessment by bioelectric impedance analysis. Increased nocturnal urinary volume is closely associated with nocturia. We investigated the relationship between nocturnal polyuria and the variation of body fluid distribution during the daytime using bioelectric impedance analysis. A total of 34 men older than 60 years were enrolled in this study. A frequency volume chart was recorded. Nocturnal polyuria was defined as a nocturnal urine volume per hour production of greater than 0. Bioelectric impedance analysis was performed 4 times daily at 8 and 11 a.
The increase in fluid in the legs compared with the volume at 8 a. Overproduction of urine per fat-free mass leads to nocturnal polyuria. Extracellular fluid accumulates as edema in the legs during the day in patients with nocturnal polyuria. The volume of accumulated extracellular fluid correlates with nocturnal urine volume. We suggest that leg edema is the source of nocturnal urine volume and decreasing edema may cure nocturnal polyuria.
Determination of saleable product in finished cattle and beef carcasses utilizing bioelectrical impedance technology. Two experiments were performed to develop prediction equations of saleable beef and to validate the prediction equations. In Exp. A four-terminal bioelectrical impedance analyzer BIA was used to measure resistance Rs and reactance Xc on each animal and processed carcass. The IMPS cuts plus trim were weighed and recorded.
Distance between detector terminals Lg and carcass temperature Tp at time of BIA readings were recorded. Regression equations for predicting kilograms of saleable product were [ The Pearson correlations between actual saleable product and the predictions based on live and cold carcass data were. The Spearman and Kendall rank correlations were. These results provide a practical application of bioelectrical impedance for market-based pricing.
They complement previous studies that assessed fat-free mass. Objective: To explore the level of resting energy expenditure REE estimated by bioelectrical impedance analysis and the association of resting metabolic rate RMR with clinical related factors, and provide new ideas for improving protein energy wasting PEW in maintenance hemodialysis MHD patients. Methods: Seven hundred and sixty-five subjects receiving MHD between July and September in 11 hemodialysis centers in Guizhou province were enrolled in this cross-sectional study.
Bioelectrical impedance analysis was used to measure RMR and body composition, such as lean body mass, fat mass and body cell mass BCM. Baseline characteristics, routine blood test indexes and biochemical data of hemodialysis patients were collected. The level of RMR and body composition in hemodialysis patients was compared by gender grouping.
Then the patients were divided into four groups according to the cutoff value of RMR quartile. Spearman correlation analysis and multiple linear regression analysis were used to analyze the relationships between RMR and clinical related factors. Results: The average age of MHD patients was The level of RMR in male patients cases, Current bioelectric impedance analysis BIA systems are often large, cumbersome devices which require strict electrode placement on the user, thus inhibiting mobile capabilities.
Ltd, Seoul, Korea. From the measured impedance data, we analyzed individual body fat and skeletal muscle mass by applying linear regression analysis against target reference data. Visceral fat estimation method by bioelectrical impedance analysis and causal analysis. It has been clarified that abdominal visceral fat accumulation is closely associated to the lifestyle disease and metabolic syndrome. The gold standard in medical fields is visceral fat area measured by an X-ray computer tomography CT scan or magnetic resonance imaging.
However, their measurements are high invasive and high cost; especially a CT scan causes X-ray exposure. They are the reasons why medical fields need an instrument for viscera fat measurement with low invasive, ease of use, and low cost. The article proposes a simple and practical method of visceral fat estimation by employing bioelectrical impedance analysis and causal analysis. In the method, abdominal shape and dual impedances of abdominal surface and body total are measured to estimate a visceral fat area based on the cause-effect structure.
The structure is designed according to the nature of abdominal body composition to be fine-tuned by statistical analysis. The experiments were conducted to investigate the proposed model. The acquired model explained the measurement principle well and the correlation coefficient is 0. Impact of eating and drinking on body composition measurements by bioelectrical impedance. The present study assessed whether the ingestion of food or drink had any biologically significant effect on bioimpedance measurements and body composition by the foot-to-foot method.
Fifty-five healthy adults [30 males and 25 females; mean SD age Body composition measurements were carried out in the fasting state, immediately after meal consumption and every 30 min for 2 h by the foot-to-foot single frequency bioimpedance technique. Bioimpedance increased significantly after the ingestion of food and fluid, although the changes were small. The electrolyte drink, high-fat and high-carbohydrate meals significantly increased the percentage body fat and fat mass.
Although there were statistically significant changes in body composition estimates after food or drink consumption, these were small and within the imprecision of the impedance technique, and so are unlikely to be of clinical significance. The present study suggests that impedance measures of body fatness in clinical settings do not require strict adherence to fasting, and this should increase the opportunities for clinical application. Prediction of maximal oxygen uptake by bioelectrical impedance analysis in overweight adolescents.
Maximal oxygen uptake VO 2max , the gold standard for measurement of cardiorespiratory fitness, is frequently difficult to assess in overweight individuals due to physical limitations. The impedance index was used as a predictor of VO 2max in 87 overweight girls and 47 overweight boys ages 12 to 17 with mean BMI of The Bland Altman procedure assessed agreement between predicted and actual VO 2max. However, using BIA data to predict maximal oxygen uptake over-predicted VO 2max at low levels of oxygen consumption and under-predicted VO 2max at high levels of oxygen consumption.
This magnitude bias, along with the large limits of agreement of BIA-derived predicted VO 2max , limit its usefulness in the clinical setting for overweight adolescents. Xie, Dawei; Anderson, Amanda H. Lee; Townsend, Raymond R. Background and objectives Previous studies in chronic disease states have demonstrated an association between lower urinary creatinine excretion UCr and increased mortality, a finding presumed to reflect the effect of low muscle mass on clinical outcomes. Little is known about the relationship between UCr and other measures of body composition in terms of the ability to predict outcomes of interest.
Participants were recruited between July and March Alterations in body fluid content can be detected by bioelectrical impedance analysis. The electrical resistance across the whole body and its segments to the conduction of a weak alternating current was determined in human subjects under three different conditions: 1 during bed rest, 2 during infusion of 1 liter of saline, and 3 during donation of 1 unit of blood.
During bed rest, extracellular and total body water were measured by dilution of bromide and heavy water, respectively. Following saline infusion, resistance determined from the whole body and all its segments fell P less than 0.
In contrast, blood donation was associated with significantly increased resistance at both measurement sites. Bioelectrical impedance analysis is a simple technique which may be useful in monitoring minimal alterations in TBW. Furthermore, altered fluid status may be predicted more accurately by changes in proximal resistance compared to changes in traditionally used whole body resistance. Measurement of nutritional status in simulated microgravity by bioelectrical impedance spectroscopy.
The potential of bioelectrical impedance spectroscopy BIS for assessing nutritional status in spaceflight was tested in two head-down-tilt bed-rest studies. In the second study, BIS did not detect an acute decrease BIS may have potential for measuring nutritional status during spaceflight, but its limitations in precision and insensitivity to acute ICW changes warrant further validation studies.
Bioelectrical impedance analysis for diagnosing sarcopenia and cachexia: what are we really estimating? As reference methods are not available for identifying low skeletal muscle mass in clinical practice, the European Group on Sarcopenia in Older People the Asian Working Group for Sarcopenia and the International Consensus for Cancer Cachexia guidelines accept bioelectrical impedance analysis BIA as an option for sarcopenia and cachexia assessment.
Using different BIA equations, several components that represent 'muscularity' can be assessed. Total skeletal muscle mass or appendicular skeletal muscle mass normalized in relation to height skeletal muscle mass index or appendicular skeletal muscle index, respectively is the most common term used in the consensus. These terms are similar, but they should not be used as synonymous. Both terms can be used to define sarcopenia, but adequate equations and cut-off values should be used according to the studied population. However, there is a disagreement between the sarcopenia definition assessed by using BIA from the European Group on Sarcopenia in Older People and Cachexia Consensus, and this can lead to an overestimation of sarcopenia and, consequently, cachexia.
An effort should be made to standardize the terminology employed by the Societies to define low muscularity and sarcopenia by using BIA. Future validation studies may show the need for specific cut-off values for each population using this method. Validation of bioelectrical impedance analysis to hydrostatic weighing in male body builders.
The purpose of this study was to compare bioelectrical impedance analysis BIA to hydrostatic weighing HW in male weight lifters and body builders. Subjects were measured on two separate occasions, 6 weeks apart, for test-retest reliability purposes. Participants recorded 3-day dietary intakes and average work-out times and regimens between the two testing periods. Percent body fat was 7. Although work-outs differed among one another, within subject training did not vary. These results suggest that measurement of percent body fat in male body builders and weight trainers is equally as accurate using BIA or HW.
Comparison of hydrostatic weighing and bioelectric impedance measurements in determining body composition pre- and postdehydration.
This study investigated the effect of dehydration on measurements of body composition by hydrostatic weighing HW and bioelectric impedance analysis BIA. Body composition was determined prior to exercise and immediately after exercise by HW and BIA techniques. In addition, BIA percent fat was 3. The BIA revealed a mean loss of 2. There are indications that BIA, with its present equational configuration, is measuring something other than lean body weight. J Orthop Sports Phys Ther ;10 11 Validation of a portable bioelectrical impedance analyzer for the assessment of body composition. Therefore, the purpose of the present study was to investigate the convergent validity of the portable bioelectrical impedance body composition analyzer, the Inbody , with dual X-ray absorptiometry DXA General Electric Lunar Prodigy.
The study population consisted of men and women age, In addition, there appears to be a systematic bias for the estimation of trunk and appendicular FFM with the Inbody in men and women. Impact of hemodialysis on dual X-ray absorptiometry, bioelectrical impedance measurements, and anthropometry. Dual X-ray absorptiometry DXA performs noninvasive assessment of bone and soft tissue with high precision. However, soft tissue algorithms assume that A total of males, Brazilian Army cadets, aged years were included. Student's t-test for paired sample , linear regression analysis, and Bland-Altman method were used to test the validity of the BIA equations.
Predictive BIA equations showed significant differences in FFM compared to DXA p Assessment of hydration status using bioelectrical impedance vector analysis in critical patients with acute kidney injury. The state of hyperhydration in critically ill patients with acute kidney injury AKI is associated with increased mortality. Bioelectrical impedance vector analysis BIVA appears to be a viable method to access the fluid status of critical patients but has never been evaluated in critical patients with AKI.
The objective of this study is to evaluate the hydration status measured using BIVA in critical patients under intensive care at the time of AKI diagnosis and to correlate this measurement with mortality. We assessed the fluid status measured using BIVA in critical patients at the time of AKI diagnosis and correlated it with mortality. Variables such as mechanical ventilation, vasoactive drug, and sepsis, among others, were collected. Bioelectrical impedance analysis BIA is a time-efficient and cost-effective method for estimating body composition.
We hypothesized that there would be no significant difference between the Stayhealthy BC1 BIA and the selected reference methods when determining body composition. Body fat by BIA was determined using a single 50 kHz frequency handheld impedance device and proprietary software. Bland and Altman analysis for men, women, and children revealed good agreement between the reference methods and BIA. Significant correlation values between BIA, and reference methods for all men, women, and children were 0. Reliability test-retest was assessed by intraclass correlation coefficient and coefficient of variation.
Intraclass correlation coefficient values were greater than 0. The current study aimed to examine the validity of various published bioelectrical impedance analysis BIA equations in estimating FFM among Chinese children and adolescents and to develop BIA equations for the estimation of fat-free mass FFM appropriate for Chinese children and adolescents. A total of healthy Chinese children and adolescents aged 9 to 19 years old males and females from Tianjin, China, participated in the BIA measurement at 50 kHz between the hand and the foot.
Multiple linear regression was conducted to examine alternative BIA equation for the studied population. When the new developed BIA equations are applied, BIA can provide a practical and valid measurement of body composition in Chinese children and adolescents. Estimation of fat-free mass in Asian neonates using bioelectrical impedance analysis. The aims of this study were to develop and validate a prediction equation of fat-free mass FFM based on bioelectrical impedance analysis BIA and anthropometry using air displacement plethysmography ADP as a reference in Asian neonates and to test the applicability of the prediction equations in independent Western cohort.
A total of neonates at birth and at week-2 of age were included. Multiple linear regression analysis was performed to develop the prediction equations in a two-third randomly selected subset and validated on the remaining one-third subset at each time point and in an independent Queensland cohort.
Accuracy of prediction equations were assessed using intra-class correlation and Bland-Altman analyses. Prediction explained Applying these equations to Queensland cohort provided similar performance at the appropriate age. However, when the Queensland equations were applied to our cohort, the bias increased slightly but with similar LOA. BIA appears to have limited use in predicting FFM in the first few weeks of life compared to simple anthropometry in Asian populations.
There is a need for population and age appropriate FFM prediction equations. Background The current study aimed to examine the validity of various published bioelectrical impedance analysis BIA equations in estimating FFM among Chinese children and adolescents and to develop BIA equations for the estimation of fat-free mass FFM appropriate for Chinese children and adolescents.
The aims of this study were to develop and validate a prediction equation of fat-free mass FFM based on bioelectrical impedance analysis BIA and anthropometry using air-displacement plethysmography ADP as a reference in Asian neonates and to test the applicability of the prediction equations in an independent Western cohort. A total of neonates at birth and at two weeks of age were included. Accuracy of prediction equations was assessed using intra-class correlation and Bland-Altman analyses.
Applying these equations to the Queensland cohort provided similar performance at the appropriate age. BIA appears to have limited use in predicting FFM in the first few weeks of life compared with simple anthropometry in Asian populations. There is a need for population- and age-appropriate FFM prediction equations. In critically ill patients, muscle loss is associated with adverse outcomes. Raw bioelectrical impedance analysis BIA parameters eg, phase angle [PA] and impedance ratio [IR] have received attention as potential markers of muscularity, nutrition status, and clinical outcomes.
Our objective was to test whether PA and IR could be used to assess low muscularity and predict clinical outcomes.
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CT scans were landmarked at the third lumbar vertebra and analyzed for skeletal muscle cross-sectional area CSA. PA and IR were also evaluated for predicting discharge status using dual-energy x-ray absorptiometry-derived cut-points for low fat-free mass index. Area under the receiver operating characteristic c-index curve to predict CT-defined low muscularity was 0.
With covariates added to logistic regression models, PA and IR c-indexes were 0. A previous study showed that reported BIA equations for body composition are not suitable for Colombian population. The purpose of this study was to develop and validate a preliminary BIA equation for body composition assessment in young females from Colombia, using hydrodensitometry as reference method.
A sample of 30 young females was evaluated. Inclusion and exclusion criteria were defined to minimize the variability of BIA. The preliminary BIA equation can be used for body composition assessment in young females from Colombia until a definitive equation is developed. It would also be desirable to develop equations for males and other ethnic groups in Colombia. Application of bioelectrical impedance analysis in prediction of light kid carcass and muscle chemical composition. Carcass data were collected from 24 kids average live weight of The amount of variation explained by VolA and VolB only reached a significant level P Simulation of a current source with a Cole-Cole load for multi-frequency electrical impedance tomography.
An accurate current source is one of the keys in the hardware of Electrical impedance Tomography systems. Limitations appear mainly at higher frequencies and for non-simple resistive loads. In this paper, we simulate an improved Howland current source with a Cole-Cole load. American Journal of Epidemiology ; 12 Measurement Error and Misclassification in Statistics and Epidemiology.
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Correlated errors in biased surrogates: study designs and methods for measurement error correction. Stat Med ; 24 11 Easy SAS calculations for risk or prevalence ratios and differences. A comparison of the clinical and cost-effectiveness of 3 intervention strategies for AIDS wasting. J Acquir Immune Defic Syndr ; 38 4 J Acquir Immune Defic Syndr ; 39 4 Bidi and cigarette smoking and risk of acute myocardial infarction among males in urban India.
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Statistical Methods in Medical Research ; 13 4 Physical activity and risk of coronary heart disease in India. Int J Epidemiol ; 33 4 Diet and risk of ischemic heart disease in India. Am J Clin Nutr ; 79 4 Dietary fiber and risk of coronary heart disease: a pooled analysis of cohort studies. Arch Intern Med ; 4 In utero exposures and the incidence of endometriosis. Fertil Steril ; 82 6 Incidence of laparoscopically confirmed endometriosis by demographic, anthropometric, and lifestyle factors.
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Curriculum Vitae (please click on link for July 1, 2017 version)
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American Journal of Epidemiology ; 3 Dairy foods, calcium, and colorectal cancer: a pooled analysis of 10 cohort studies. J Natl Cancer Inst ; 96 13 J Natl Cancer Inst ; 96 4 Cancer Epidemiol Biomarkers Prev ; 13 8 Heterogeneity of risk factors and antibody profiles in epstein-barr virus genome-positive and -negative hodgkin lymphoma. The Journal of infectious diseases ; 12 J Womens Health Larchmt ; 13 9 Plasma lipid and lipoprotein levels during the follicular and luteal phases of the menstrual cycle.
J Clin Endocrinol Metab ; 89 2 Bang H, Spiegelman D. Estimating treatment effects in studies of perinatal transmission of HIV. Biostatistics ; 5 1 Role of acquired immune deficiency syndrome-defining conditions in human immunodeficiency virus-associated wasting. Clinical infectious diseases: an official publication of the Infectious Diseases Society of America ; 37 Suppl 2:S Pattern and predictors of weight gain during pregnancy among HIVinfected women from Tanzania.
J Acquir Immune Defic Syndr ; 32 5 Journal of Statistical Planning and Inference ; The HRAS1 variable number of tandem repeats and risk of breast cancer. Cancer Epidemiol Biomarkers Prev ; 12 12 Fruits, vegetables and lung cancer: a pooled analysis of cohort studies. Int J Cancer ; 6 Dietary carotenoids and risk of coronary artery disease in women. Am J Clin Nutr ; 77 6 Vitamin C and risk of coronary heart disease in women. J Am Coll Cardiol ; 42 2 Alcohol consumption patterns and HbA1c, C-peptide and insulin concentrations in men.
Journal of the American College of Nutrition ; 22 3 The use of B vitamin supplements and peripheral arterial disease risk in men are inversely related. Dietary fiber reduces peripheral arterial disease risk in men. J Nutr ; 11 Multiple sclerosis and Epstein-Barr virus.
Jama ; 12 A cross-sectional study of alcohol consumption patterns and biologic markers of glycemic control among women. Diabetes Care ; 26 7 Prospective study of the association of changes in dietary intake, physical activity, alcohol consumption, and smoking with 9-y gain in waist circumference among 16 US men. Am J Clin Nutr ; 78 4 The impact of protein intake on renal function decline in women with normal renal function or mild renal insufficiency.
Ann Intern Med ; 6 Occupational exposure to methyl tertiary butyl ether in relation to key health symptom prevalence: the effect of measurement error correction. Environmetrics ; 14 6 Joint association of alcohol and folate intake with risk of major chronic disease in women. Difficulty swallowing and lack of receipt of highly active antiretroviral therapy predict acute weight loss in human immunodeficiency virus disease. Clinical infectious diseases: an official publication of the Infectious Diseases Society of America ; 37 10 High-fiber diet in HIV-positive men is associated with lower risk of developing fat deposition.
A prospective study of XRCC1 haplotypes and their interaction with plasma carotenoids on breast cancer risk. Cancer Res ; 63 23 Vitamin and carotenoid intake and risk of squamous cell carcinoma of the skin. Int J Cancer ; 1 Clinical infectious diseases: an official publication of the Infectious Diseases Society of America ; 36 8 Premenopausal intakes of vitamins A, C, and E, folate, and carotenoids, and risk of breast cancer.
Cancer Epidemiol Biomarkers Prev ; 12 8 Premenopausal fat intake and risk of breast cancer. J Natl Cancer Inst ; 95 14 Premenopausal dietary carbohydrate, glycemic index, glycemic load, and fiber in relation to risk of breast cancer. Use of complementary and alternative therapies by patients with human immunodeficiency virus disease in the era of highly active antiretroviral therapy.
Journal of alternative and complementary medicine New York, NY ; 9 1 High trans-fatty acids in adipose tissue are associated with increased risk of nonfatal acute myocardial infarction in Costa Rican adults. Adipose tissue alpha-linolenic acid and nonfatal acute myocardial infarction in Costa Rica. Circulation ; 12 Intakes of vitamins E and C, carotenoids, vitamin supplements, and PD risk. Neurology ; 59 8 Mercury and the risk of coronary heart disease in men. N Engl J Med ; 22 Nutrient intake and body weight in a large HIV cohort that includes women and minorities.
J Am Diet Assoc ; 2 Changes in lean body mass and total body weight are weakly associated with physical functioning in patients with HIV infection. HIV Med ;3 4 HIV status and sociodemographic correlates of maternal body size and wasting during pregnancy. Eur J Clin Nutr ;56 5 Effect of multivitamin and vitamin A supplements on weight gain during pregnancy among HIVinfected women.
Am J Clin Nutr ;76 5 Vitamin A supplements ameliorate the adverse effect of HIV-1, malaria, and diarrheal infections on child growth. Pediatrics ; 1 :E6. Weight loss and survival in HIV-positive patients in the era of highly active antiretroviral therapy. J Acquir Immune Defic Syndr ;31 2 The performance of methods for correcting measurement error in case-control studies.
Epidemiology ;13 5 Staudenmayer J, Spiegelman D. Biometrics ;58 4 Role of cytokines and testosterone in regulating lean body mass and resting energy expenditure in HIV-infected men. American journal of physiology Endocrinology and metabolism ; 1 :E Physical activity, body mass index, and ovulatory disorder infertility.
Epidemiology ;13 2 Meat and dairy food consumption and breast cancer: a pooled analysis of cohort studies. Int J Epidemiol ;31 1 Diet quality and major chronic disease risk in men and women: moving toward improved dietary guidance. Am J Clin Nutr ;76 6 Coffee intake is associated with lower risk of symptomatic gallstone disease in women. Gastroenterology ; 6 J Acquir Immune Defic Syndr ;30 3 No association between a single nucleotide polymorphism in CYP19 and breast cancer risk. Cancer Epidemiol Biomarkers Prev ;11 2 Cancer Res ;62 4 Vitamins and carotenoids intake and the risk of basal cell carcinoma of the skin in women United States.
Cancer Causes Control ;13 3 Intake of alcohol and alcoholic beverages and the risk of basal cell carcinoma of the skin. Cancer Epidemiol Biomarkers Prev ;11 10 Pt 1 Weight loss and body-composition changes in men and women infected with HIV. Randomized trial of vitamin supplements in relation to transmission of HIV-1 through breastfeeding and early child mortality. Aids ;16 14 J Acquir Immune Defic Syndr ;31 3 Dietary and adipose tissue gamma-tocopherol and risk of myocardial infarction. Individual carotenoid concentrations in adipose tissue and plasma as biomarkers of dietary intake.
Am J Clin Nutr ;76 1 Intakes of carotenoids, vitamin C, and vitamin E and MS risk among two large cohorts of women. Neurology ;57 1 Patterns of adherence with antiretroviral medications: an examination of between-medication differences. J Acquir Immune Defic Syndr ;28 3 Statistics In Medicine ;20 1 Brassica vegetables and breast cancer risk—reply. JAMA ; 23 Intake of fruits and vegetables and risk of breast cancer: a pooled analysis of cohort studies. Jama ; 6 Types of dietary fat and breast cancer: a pooled analysis of cohort studies.
Int J Cancer ;92 5 Validation of the Gail et al. J Natl Cancer Inst ;93 5 Differences in perinatal transmission among human immunodeficiency virus type 1 genotypes. Journal of human virology ;4 1 Predictors of airborne endotoxin in the home. Environ Health Perspect ; 8 House dust endotoxin and wheeze in the first year of life. The correlates of dietary intake among HIV-positive adults.
The American Journal of Clinical Nutrition ;74 6 Application of the method of triads to evaluate the performance of food frequency questionnaires and biomarkers as indicators of long-term dietary intake. The effect of fruit and vegetable intake on risk for coronary heart disease. Ann Intern Med ; 12 Sex-specific mortality from adult T-cell leukemia among carriers of human T-lymphotropic virus type I.
International Journal of Cancer ;91 4 Association of genetic polymorphisms in UGT1A1 with breast cancer and plasma hormone levels. Cancer Epidemiol Biomarkers Prev ;10 6 Association between dietary patterns and plasma biomarkers of obesity and cardiovascular disease risk.
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Am J Clin Nutr ;73 1 Weight and body composition in a cohort of HIV-positive men and women. Public Health Nutr ;4 3 Relationship of a large weight loss to long-term weight change among young and middle-aged US women. International Journal of Obesity ;25 8 Predictors of intrauterine and intrapartum transmission of HIV-1 among Tanzanian women. Aids ;15 9 The American Journal of Clinical Nutrition ;74 3 Determinants of low birth weight among HIV-infected pregnant women in Tanzania.
Am J Clin Nutr ;74 6 HEpiMA: software for the identification of heterogeneity in meta-analysis. Comput Methods Programs Biomed ;64 2 BJOG : an international journal of obstetrics and gynaecology ; 11 Dietary and lifestyle factors in relation to plasma leptin concentrations among normal weight and overweight men. International journal of obesity and related metabolic disorders: journal of the International Association for the Study of Obesity ;25 1 Plasma insulin, leptin, and soluble TNF receptors levels in relation to obesity-related atherogenic and thrombogenic cardiovascular disease risk factors among men.
Plasma leptin concentrations and four-year weight gain among US men. International Journal of Obesity ; 25 3 Prospective study of zinc intake and the risk of age-related macular degeneration. Ann Epidemiol ;11 5 Prospective study of dietary fat and the risk of age-related macular degeneration. Am J Clin Nutr ;73 2 Epstein-Barr virus antibodies and risk of multiple sclerosis: a prospective study. Journal of Infectious Diseases ; 10 AIDS research and human retroviruses ;17 12 Relation of lean body mass to health-related quality of life in persons with HIV.
J Acquir Immune Defic Syndr ;24 2 Weight loss and wasting remain common complications in individuals infected with human immunodeficiency virus in the era of highly active antiretroviral therapy. Clinical infectious diseases: an official publication of the Infectious Diseases Society of America ;31 3 Vitamin A supplementation and other predictors of anemia among children from Dar Es Salaam, Tanzania.
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The American journal of tropical medicine and hygiene ;62 5 Pooled analysis of prospective cohort studies on height, weight, and breast cancer risk. Measurement error correction using validation data: a review of methods and their applicability in case-control studies. Statistical Methods in Medical Research ;9 5 Journal of the American Statistical Association ; Proportion of colon cancer risk that might be preventable in a cohort of middle-aged US men.
Longitudinal study of dust and airborne endotoxin in the home. Environ Health Perspect ; 11 Predictors of change in the functional status of children with human immunodeficiency virus infection. Pediatrics ; 2 :E Prospective study of dietary supplements, macronutrients, micronutrients, and risk of bladder cancer in US men. Adherence to the Dietary Guidelines for Americans and risk of major chronic disease in men. Am J Clin Nutr ;72 5 Diarrhea and abnormalities of gastrointestinal function in a cohort of men and women with HIV infection.
Am J Gastroenterol ;95 12 East African medical journal ;77 4 African journal of reproductive health ;4 1 Prospective study of major dietary patterns and risk of coronary heart disease in men. Am J Clin Nutr ;72 4 Dietary fat intake and endogenous sex steroid hormone levels in postmenopausal women. J Clin Oncol ;18 21 A prospective study of the effect of alcohol consumption and ADH3 genotype on plasma steroid hormone levels and breast cancer risk.
Cancer Epidemiol Biomarkers Prev ;9 10 Oral contraceptives and the incidence of multiple sclerosis. Neurology ;55 6 A tetranucleotide repeat polymorphism in CYP19 and breast cancer risk. Int J Cancer ;87 2 Polymorphic repeat in AIB1 does not alter breast cancer risk. Breast Cancer Res ;2 5 Leisure-time physical activity, television watching, and plasma biomarkers of obesity and cardiovascular disease risk.
Body composition and dietary intake in relation to drug abuse in a cohort of HIV-positive persons. Randomized trial of vitamin supplements in relation to vertical transmission of HIV-1 in Tanzania. J Acquir Immune Defic Syndr ;23 3 Vitamin A supplements and diarrheal and respiratory tract infections among children in Dar es Salaam, Tanzania.
The Journal of pediatrics ; 5 Glycemic status and soluble tumor necrosis factor receptor levels in relation to plasma leptin concentrations among normal weight and overweight US men. International journal of obesity and related metabolic disorders : journal of the International Association for the Study of Obesity ;24 9 Prospective study of alcohol consumption and the risk of age-related macular degeneration.
Archives of ophthalmology ; 5 Adiposity and Mortality in Men. The Journal of Nutrition ; 8 Relationship between serum estradiol levels and the increases in high-density lipoprotein levels in postmenopausal women treated with oral estradiol. Fertilization in Protozoa and Metazoan Animals. Juan J. Vitamins and Hormones.
Gerald Litwack. Gotthard Schettler. Function of Somatic Cells in the Testis. Andrzej Bartke. Pancreatic Islet Isolation. Molecular Biology of the Male Reproductive System. David de Kretser. Basics of Human Andrology. Anand Kumar. Fertility Preservation. Emre Seli. Testis, Epididymis and Technologies in the Year The Molecular Biology of Cadherins. Frans Van Roy. Muscarinic Receptors. Allison D. Studies in Diabetes. Irina Obrosova. Mechanisms of Vascular Defects in Diabetes Mellitus.
Pancreatic Islet Biology. Anandwardhan A. Endocrine Pathology. Ricardo V. Sperm Chromatin.
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Armand Zini. Growth Hormone in Health and Disease. Felipe F. Nuclear Receptors. Chris M. Michael O. Hormones and Transport Systems. Pancreatic Stem Cells. Stem Cell Therapy for Diabetes.
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