We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Resting energy expenditure of a diverse group of South African men and women.
- Authors
Pretorius, Adeline; Piderit, Monique; Becker, Piet; Wenhold, Friede
- Abstract
Background: In South Africa, overweight/obesity is a public health concern, disproportionally affecting Black females. A contributory role of a lower resting energy expenditure (REE) is suggested for African Americans. The present study assessed the REE of Black and White South African adults aiming to better understand the underlying predictors to overweight/obesity and transform this into locally appropriate recommendations. Methods: In 328 (63% female; 39% Black) healthy South African adults, REE was measured with indirect calorimetry and body composition with multifrequency bioelectrical impedance analysis. The REE was estimated with 30 sets of published equations. Black–White differences in REE, as measured and adjusted (analysis of covariance), were determined with quantile regression. Reliability/agreement of estimated (against measured) REE was determined with intra‐class correlations (ICCs) and Bland–Altman analysis. A new equation was developed by median regression followed by preliminary validation. Results: Measured REE (adjusted for age along with fat‐free mass [FFM], FFM index, FFM plus fat mass, FFM index plus fat mass index) in White subjects was significantly higher (p < 0.001) than in Black subjects for men and women alike, regardless of obesity class. None of the sets of estimation equations had good agreement with measured REE for Black, White, male and female subjects simultaneously. A new estimation equation, based on whole‐body variables, had good reliability (ICC = 0.79) and agreement (mean difference: 27 kJ) and presents practical opportunities for groups at the local grass‐roots level. Conclusions: The REE in Black South African adults is lower than in White adults. Tailored REE equations may improve REE estimation of racially/ethnically diverse South African groups and contribute to improved obesity management. Key points: A lower resting energy expenditure (REE) may partially explain the disproportionate prevalence of overweight/obesity among Black South African females. The present study assessed the REE of Black and White South African men and women to improve the understanding of the underlying predictors to overweight/obesity and to transform this into locally appropriate recommendations.The REE, when adjusted for age along with body composition variables, of Black subjects were significantly lower than in White subjects for both males and females alike. This may indicate the need for population‐specific prediction equations to calculate REE in resource‐limited settings where access to REE measurements are limited.As a secondary objective, the reliability/agreement between measured REE and estimation equations, typically used in local settings to calculate REE, was determined. Informed by the outcome, a new population‐specific equation was developed followed by preliminary validation for application at the local grass‐roots level.
- Subjects
SOUTH Africa; PREVENTION of obesity; REGULATION of body weight; ENERGY metabolism; BODY composition; BLACK people; CROSS-sectional method; RACE; REGRESSION analysis; SEX distribution; BIOELECTRIC impedance; ANALYSIS of covariance; INTRACLASS correlation; DESCRIPTIVE statistics; WHITE people; STATISTICAL sampling; CALORIMETRY
- Publication
Journal of Human Nutrition & Dietetics, 2022, Vol 35, Issue 6, p1164
- ISSN
0952-3871
- Publication type
Article
- DOI
10.1111/jhn.13022