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PubMedDate not supplied

[A comparative study of skinfold thickness and bioelectric impedance analysis in the evaluation of body composition of children and adolescents].

A comparative study as carried out between skin-fold thickness tests and bioelectric impedance analysis (BIA) to assess the validity of the latter as a method for evaluating body composition in childhood and youth. The percentage values of total body fat obtained using both methods in 117 boys and girls aged between 8 and 14 appear to be significantly correlated (p less than 0.01) in both sexes (males: r = 0.891; females: r = 0.830) and in each group of subjects subdivided according to stage of puberal development (8-11 years: r = 0.905; 12-14 years: r = 0.864) or the degree of physical activity performed (active: r = 0.880; sedentary: r = 0.915). The results of the study confirm that BIA represents a valid and reliable method to analyse body composition even during circumpuberal development in phase opposition. Moreover, BIA provides an estimate of total body fat which is independent of the differences in distribution between surface and deep deposits.

Adipose Tissue↗
PubMed2002

Anthropometric assessment of muscularity during growth: estimating fat-free mass with 2 skinfold-thickness measurements is superior to measuring midupper arm muscle area in healthy prepubertal children.

BACKGROUND: Anthropometric measurements are widely used to determine body composition, especially in children. OBJECTIVE: Our aim was to compare 2 of the simplest anthropometry-based equations available for determining nutritional status and muscularity in children and adolescents, examined in relation to other methodologically independent muscle variables. DESIGN: Midupper arm muscle area (UAMA) and fat-free mass (FFM) according to the equations of Slaughter et al (Hum Biol 1988;60:709-23), as well as separate biochemical, physical, and radiologic muscle variables, were determined cross-sectionally in 91 males and 91 females aged 6-18 y. The ability of UAMA and FFM to estimate muscularity, as measured by 24-h creatinine excretion, grip force, and peripheral quantitative computer tomography analysis of forearm muscle, was compared after dividing the study population into prepubertal and pubertal groups. RESULTS: Before puberty, correlations of all 3 muscularity variables were higher with FFM than with UAMA in both males and females. Multiple regression analyses confirmed FFM to be the predominant predictor, with partial R(2) >/= 0.68 (P < 0.001). However, in puberty, FFM did not consistently show this major influence. Only before puberty did FFM provide a significantly better fit (P < 0.05) than did UAMA for 2 of the 3 muscularity variables in each sex. CONCLUSIONS: The FFM estimate proved to be the better predictor for muscularity in healthy prepubertal children and is on a par with UAMA during puberty. FFM can be recommended as a simple anthropometric method to assess nutritional status before puberty, at least in healthy children.

Adolescent↗
PubMed1977

Subcutaneous fat in newborn infants of diabetic mothers: An indication of quality of diabetic control.

Biceps, triceps, subscapular, and suprailiac skinfolds were measured in 40 newborn infants of diabetic mothers. Maternal fasting blood-glucose and mean blood-glucose in the third trimester correlated significantly with neonatal skinfold thickness. Skinfold measurement, when compared with a reference range for gestational age, may be a convenient way of assessing one effect of maternal diabetes on the fetus. Gluteal adipose-cell diameter was measured in 31 infants of diabetic mothers. The fattest babies had the largest adipose cells and there was a significant positive correlation between maternal fasting blood-glucose and neonatal adipose cell diameter. These findings are consistent with the hypothesis that in diabetic pregnancy fetal hyperglycaemia and hyperinsulinism stimulate increased triglyceride synthesis in adipose cells and enlargement of adipose cells and lead to an increase in fetal subcutaneous fat.

Adipose Tissue↗
PubMed1995

Internal validity of the physical activity index over 26 years in middle-aged and older men.

OBJECTIVE: To determine the internal validity of the physical activity index (PAI). DESIGN: Three time periods over a 26-year period (1965/68 examination, n = 7911; 1980/82 examination, n = 2054; 1991/93 examination, n = 3425). SETTING: Honolulu, Hawaii. PARTICIPANTS: Middle-aged to older Japanese-American men. MEASUREMENTS: PAI, other physical activity measures, body mass index (BMI), tricep skinfold thickness, subscapular skinfold thickness, and HDL cholesterol. RESULTS: PAI levels was associated significantly with levels of other physical activity measures at all time periods. Higher PAI level was associated with lower BMI at the baseline examination (1965/68), lower subscapular skinfold thickness at the 1965/68 and 1980/82 examinations, lower tricep skinfold thickness at all examinations, and higher HDL cholesterol at the 1980/82 examination. Change in PAI level from 1965/68 to 1980/82 was associated with change in BMI, subscapular, and tricep skinfold thickness levels, but there were no significant associations between change in PAI level and change in BMI, skinfold thicknesses, or HDL cholesterol levels from 1980/82 to 1991/93. CONCLUSION: PAI level is a relatively valid estimate of overall daily energy expenditure that may be an acceptable general measure across the middle-to-late stages of life. The PAI may also be sensitive enough to discern a shift toward less physical demanding activities as a population becomes older, although further studies should be conducted to better determine its validity in older populations.

Aged↗
PubMed1993

Physical activity is a significant predictor of body density in women.

The purposes of this study were to 1) develop and cross-validate a prediction equation for body density with leisure-time physical activity (LTA) serving as a potential predictor, and 2) determine whether the addition of LTA to previously published equations would improve their prediction. Body density (hydrostatic weighing) was measured in a validation group of 111 women (aged 18-81 y) and was predicted by age, mass, body mass index (BMI), abdominal skinfold thickness, thigh skinfold thickness, and LTA. This equation was cross-validated on an independent group of women (n = 56). Consequently, groups were combined (n = 167) to yield a new equation that also included age, mass, BMI, abdominal skinfold thickness, thigh skinfold thickness, and LTA (R = 0.92, SEE = 7.9 g/L, P < 0.0001). LTA improved the prediction of equations published on women with relatively low body densities, but not on women with higher densities. In conclusion, LTA is an independent predictor of body density in healthy women and its prediction becomes stronger as body density decreases.

Adipose Tissue↗
PubMed1983

Prediction of body volume by a stepwise linear regression technique.

Body volume and 35 anthropometric measurements were obtained from 88 active soldiers using standard techniques. These anthropometric measurements were examined for their possible relationships to body volume using stepwise linear regression analysis. Four measurements (Body weight, anterior thigh skinfold thickness, subscapular skinfold thickness and suprailiac skinfold thickness) accounted for 99.7% of the variation in body volume and the introduction of each of these measurements in the equation was significant. The regression equation for predicting body volume from these 4 anthropometric measurements had a multiple correlation coefficient of 0.9987 (P less than 0.001). Body weight alone was correlated with body volume to the extent of 0.9966. An attempt has therefore been made to develop a multiple linear regression equation without incorporation of body weight in the regression analysis. Nine measurements were selected by stepwise linear regression analysis for predicting body volume. These nine measurements accounted for 97.1% of the variation in body volume. These equations have been validated on another small sample of 22 soldiers. The analysis has also revealed that a direct regression of body density from the anthropometric variables gives more accurate results than when estimated body volumes are utilized for calculating body density.

Adolescent↗
PubMed1996

The reallocation of body fat toward the abdomen persists to very old age, while body mass index declines after middle age in Chinese.

OBJECTIVES: Age-specific distributions of several anthropometric measurements were examined to elucidate age-associated changes. DESIGN: Community-based cross-sectional analysis, which was performed on anthropometric data collected from members of 2769 families from November 1991 to September 1993. SUBJECTS: 2776 Chinese men and 3176 non-pregnant Chinese women. MEASUREMENTS: Age-specific values of several obesity indices, including a general obesity index (body mass index) and obesity indices at various parts of the body, including waist-to-hip ratio, waist circumference, hip circumference, arm circumference, triceps skinfold thickness and subscapular skinfold thickness. RESULTS: The age-specific percentile values of weight, body mass index, arm circumference, triceps skinfold thickness, subscapular skinfold thickness and hip circumference showed a gradual increase with age up to middle age, but a decline subsequently. This 'up and then down' phenomenon occurred later in women than in men. On the other hand, age-specific percentile values of waist circumference and waist-to-hip ratio showed a steady increase with age from early life. CONCLUSIONS: These data indicate that, in very old age, a greater amount of fat tends to accumulate in the abdominal region compared to the deposition in the younger age groups. This occurs despite a decrease in body weight and body mass index after middle age.

Abdomen↗
PubMed1998

Reliability of manual skinfold tests in a healthy male population.

OBJECTIVE: To assess the intra- and interexaminer agreement of a manual skinfold thickness test and a manual skinfold compliance test. The relation between the weekly routine of the examiners and the intraexaminer reliability was also assessed for both tests. DESIGN: This is a reliability study of a common palpatory procedure to assess skinfold thickness and skinfold compliance. Twelve healthy subjects were palpated twice in two sessions by 12 examiners. SETTING: The study was conducted at the Polytechnic of Utrecht (the Netherlands), Faculty of Health Care, Department of Physiotherapy. SUBJECTS: Healthy male subjects recruited from students of the Polytechnic of Utrecht (the Netherlands), Department of Physiotherapy. RESULTS: The intraexaminer agreement Intraclass Correlation Coefficient [ICC(3.1)] was .25 for skinfold thickness and .28 for skinfold compliance. The interexaminer agreement [ICC(2,1)] ranged from .01 to .24. The Pearson correlation coefficient between the examiners age and routine vs. intraexaminer agreement ranged from -.41 to .23 (nonsignificant). CONCLUSIONS: The intra- and interexaminer agreement of the manual skinfold test produced poor-to-fair reliability. The correlation between the examiners' weekly routine and the intraexaminer reliability ranged from low negative to little (if any). This study shows a lack of reliability of palpatory tests for skinfold thickness and skinfold compliance. This outcome agrees with results of previous studies found in the literature.

Adult↗
PubMed1985

Influences in child growth associated with poverty in the 1970's: an examination of HANESI and HANESII, cross-sectional US national surveys.

This research examines associations between various measures of child growth (height, weight, triceps skinfold thickness, subscapular skinfold thickness), dietary variables, and poverty status in a sample of 13,750 black and white children aged 1 to 17 yr. The data used in this survey were collected in the National Health and Nutrition Examination Surveys I and II (HANESI, 1971-1975, and HANESII, 1976-1980). In general, lower mean values for all the growth measures examined were found in children living below the defined poverty threshold in comparison with those above the poverty threshold. The magnitude of these poverty-associated differences tended to decrease between the times of the HANESI and HANESII surveys, though not sufficiently to be statistically significant. These differences in growth were not consistently associated with differences in dietary intake of energy between poverty groups or surveys.

Adolescent↗
PubMed2004

[Validation of methods for estimating HIV/AIDS patients' body fat].

OBJECTIVE: To validate different methods for estimating HIV/Aids patients' body fat: total body skinfold thickness, central (trunk) skinfold thickness, peripheral (limb) skinfold thickness, waist circumference (WC) and waist-to-hip ratio (WHR). Dual-energy X-ray absorptiometry (DEXA) and computed tomography of the abdomen (CTA) were used as the gold standard. METHODS: An analysis was done on 15 adult HIV/Aids patients (10 men and 5 women) who were being treated at an Aids clinic at a public university hospital, Sao Paulo, Brazil. Their total subcutaneous fat (TSF) was estimated from the sum of the thicknesses of the biceps, triceps, subscapular, midaxillary, suprailiac, abdominal and medial calf skinfolds. The central subcutaneous fat (CSF) was estimated by summing the subscapular, axillary, suprailiac and abdominal skinfold measurements. The peripheral subcutaneous fat (PSF) was estimated by summing the biceps, triceps and medial calf skinfold measurements. These were compared with Dexa. The WC, WHR and CSF were compared with CTA. In the statistical analysis, the Pearson correlation coefficient (r) and Mann-Whitney test were utilized. RESULTS: There was a correlation between fat mass measured by DEXA and by TSF, CSF and PSF, even after adjusting for age (r> or =0.80 for all). WC, WHR and CSF presented correlation with total abdominal fat measured by CTA, even after adjusting for age (r> or =0.80 for all). CONCLUSIONS: The methods for estimating body fat should be chosen according to the type of fat to be evaluated and can be used in research and healthcare services instead of DEXA and CTA for HIV/AIDS patients.

Absorptiometry, Photon↗