TY - JOUR
T1 - Development of bioelectrical impedance analysis-based equations for estimation of body composition in postpartum rural Bangladeshi women
AU - Shaikh, Saijuddin
AU - Schulze, Kerry J.
AU - Kurpad, Anura
AU - Ali, Hasmot
AU - Shamim, Abu Ahmed
AU - Mehra, Sucheta
AU - Wu, Lee S.F.
AU - Rashid, Mahbubar
AU - Labrique, Alain B.
AU - Christian, Parul
AU - West, Keith P.
PY - 2013/2/28
Y1 - 2013/2/28
N2 - Equations for predicting body composition from bioelectrical impedance analysis (BIA) parameters are age-, sex-and population-specific. Currently there are no equations applicable to women of reproductive age in rural South Asia. Hence, we developed equations for estimating total body water (TBW), fat-free mass (FFM) and fat mass in rural Bangladeshi women using BIA, with 2H2O dilution as the criterion method. Women of reproductive age, participating in a community-based placebo-controlled trial of vitamin A or β-carotene supplementation, were enrolled at 19·7 (sd 9·3) weeks postpartum in a study to measure body composition by 2H2O dilution and impedance at 50Â kHz using multi-frequency BIA (n 147), and resistance at 50Â kHz using single-frequency BIA (n 82). TBW (kg) by 2H2O dilution was used to derive prediction equations for body composition from BIA measures. The prediction equation was applied to resistance measures obtained at 13 weeks postpartum in a larger population of postpartum women (n 1020). TBW, FFM and fat were 22·6 (sd 2·7), 30·9 (sd 3·7) and 10·2 (sd 3·8)Â kg by 2H2O dilution. Height2/impedance or height2/resistance and weight provided the best estimate of TBW, with adjusted R 2 0·78 and 0·76, and with paired absolute differences in TBW of 0·02 (sd 1·33) and 0·00 (sd 1·28)Â kg, respectively, between BIA and 2H2O. In the larger sample, values for TBW, FFM and fat were 23·8, 32·5 and 10·3Â kg, respectively. BIA can be an important tool for assessing body composition in women of reproductive age in rural South Asia where poor maternal nutrition is common.
AB - Equations for predicting body composition from bioelectrical impedance analysis (BIA) parameters are age-, sex-and population-specific. Currently there are no equations applicable to women of reproductive age in rural South Asia. Hence, we developed equations for estimating total body water (TBW), fat-free mass (FFM) and fat mass in rural Bangladeshi women using BIA, with 2H2O dilution as the criterion method. Women of reproductive age, participating in a community-based placebo-controlled trial of vitamin A or β-carotene supplementation, were enrolled at 19·7 (sd 9·3) weeks postpartum in a study to measure body composition by 2H2O dilution and impedance at 50Â kHz using multi-frequency BIA (n 147), and resistance at 50Â kHz using single-frequency BIA (n 82). TBW (kg) by 2H2O dilution was used to derive prediction equations for body composition from BIA measures. The prediction equation was applied to resistance measures obtained at 13 weeks postpartum in a larger population of postpartum women (n 1020). TBW, FFM and fat were 22·6 (sd 2·7), 30·9 (sd 3·7) and 10·2 (sd 3·8)Â kg by 2H2O dilution. Height2/impedance or height2/resistance and weight provided the best estimate of TBW, with adjusted R 2 0·78 and 0·76, and with paired absolute differences in TBW of 0·02 (sd 1·33) and 0·00 (sd 1·28)Â kg, respectively, between BIA and 2H2O. In the larger sample, values for TBW, FFM and fat were 23·8, 32·5 and 10·3Â kg, respectively. BIA can be an important tool for assessing body composition in women of reproductive age in rural South Asia where poor maternal nutrition is common.
KW - Bioelectrical impedance analysis
KW - Body composition
KW - H2O dilution
KW - Prediction equations
KW - Reproductive age
KW - South Asia
KW - Total body water
KW - Women
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U2 - 10.1017/S0007114512001687
DO - 10.1017/S0007114512001687
M3 - Article
C2 - 22716500
AN - SCOPUS:84885800952
SN - 0007-1145
VL - 109
SP - 639
EP - 647
JO - British Journal of Nutrition
JF - British Journal of Nutrition
IS - 4
ER -