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Comparative Study
English Abstract
Journal Article
[Assessment of body composition in pregnant women at term].
Revista da Associação Médica Brasileira 1997 April
BACKGROUND: Pregnancy is associated with well-known physiologic changes of maternal fluid and energy compartments, along with organ hypertrophies and the appearance of fetal and placental tissues. As a consequence, body composition is modified, but this phenomenon has not been well documented. The advent of bioimpedance has contributed to the documentation of the desired information in a safe and practical way.
AIMS: The aims of this study were: To register the principal anthropometric variables in a population of pregnant women at term; To determine body composition by bioimpedance analysis; To compare these findings with the former results, as well as with other assessment procedures reported in the literature.
PATIENTS AND METHOD: The population consisted of 30 pregnant women at term admitted for delivery, without complications, fetal distress or multiple pregnancy, and submitted to the following measurements: Anthropometry--Weight, height, body mass index, triceps skinfold, arm muscle circumference; Bioimpedance analysis--Body fat, lean body mass, total water, intra and extra-cellular water, third space, and exchangeable Na/K ratio.
RESULTS: Body weight and body mass index were increased but within the expected values for these patients. Total body water was similar to results in non-pregnant women when expressed as percentage, in accordance with other studies, but with a trend toward increase in the extracellular compartment and presence of third space fluid. Body fat was elevated, but the proportions were not much different from previous anthropometric surveys.
CONCLUSIONS: In the conditions of this investigation, in which a bioimpedance equation for general use was employed, the method indicated results that were consistent with the clinical course, anthropometric documentation, and the findings of other groups. It is concluded that bioimpedance analysis compares favorably with other assessment procedures in pregnancy, and further studies with this method should be undertaken.
AIMS: The aims of this study were: To register the principal anthropometric variables in a population of pregnant women at term; To determine body composition by bioimpedance analysis; To compare these findings with the former results, as well as with other assessment procedures reported in the literature.
PATIENTS AND METHOD: The population consisted of 30 pregnant women at term admitted for delivery, without complications, fetal distress or multiple pregnancy, and submitted to the following measurements: Anthropometry--Weight, height, body mass index, triceps skinfold, arm muscle circumference; Bioimpedance analysis--Body fat, lean body mass, total water, intra and extra-cellular water, third space, and exchangeable Na/K ratio.
RESULTS: Body weight and body mass index were increased but within the expected values for these patients. Total body water was similar to results in non-pregnant women when expressed as percentage, in accordance with other studies, but with a trend toward increase in the extracellular compartment and presence of third space fluid. Body fat was elevated, but the proportions were not much different from previous anthropometric surveys.
CONCLUSIONS: In the conditions of this investigation, in which a bioimpedance equation for general use was employed, the method indicated results that were consistent with the clinical course, anthropometric documentation, and the findings of other groups. It is concluded that bioimpedance analysis compares favorably with other assessment procedures in pregnancy, and further studies with this method should be undertaken.
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