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Agreement between specific measures of adiposity and associations with high blood pressure in black South African women

Published on Jul 12, 2017in American Journal of Health Behavior
· DOI :10.1002/AJHB.23042
Herculina S. Kruger23
Estimated H-index: 23
(NWU: North-West University),
Chrisna Botha-Ravyse2
Estimated H-index: 2
(NWU: North-West University)
+ 2 AuthorsJ.M. Van Rooyen19
Estimated H-index: 19
(NWU: North-West University)
Abstract
Objectives To derive percentage body fat (%BF) cut-points according to body mass index (BMI) categories for adult black South African women and to investigate the agreement between adiposity classifications according to WHO BMI and %BF cut-points. The secondary aim was to determine the association between these different adiposity measures and high blood pressure. Methods Black women aged 29–65 years (n = 435) from Ikageng, South Africa, were included in this cross-sectional study. Socio-demographic and anthropometric data were collected (weight, height and BMI). %BF using dual-energy X-ray absorptiometry and blood pressure were measured. Results There was significant agreement between three %BF categories: low/normal (<35.8% age 29–49 years; or <38% age 50–65 years), overweight range (35.8–40.7% age 29–49 years; or 38–42.1% age 50–65 years) and obese (≥40.7% age 29–49 years; or ≥42.1% age 50–65 years) and three BMI categories: low/normal (<25 kg/m2), overweight range (25–29.9 kg/m2) and obese (≥30kg/m2); (κ = 0.62, P < .0001). Despite statistically significant agreement between groups, more than half of overweight individuals were misclassified as having either a normal (30.2%) or obese %BF (25.5%). %BF misclassification was low in the low/normal and obese BMI ranges. After adjustment for confounders, obesity (BMI ≥ 30kg/m2), as well as high %BF were significantly associated with high blood pressure (OR = 1.75, 95% CI 1.09–2.81 versus OR = 1.92, 95% CI 1.15–3.23, respectively). Conclusion Despite significant agreement between BMI and %BF categories, considerable misclassification occurred in the overweight range. Participants with excessive %BF had a greater odds of high blood pressure than those in the highest BMI category.
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References27
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#1Vasilios Kotsis (A.U.Th.: Aristotle University of Thessaloniki)H-Index: 20
#2Peter Nilsson (Lund University)H-Index: 62
Last. J. Jordan (University of Debrecen)H-Index: 2
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#1Yackoob K. Seedat (UKZN: University of KwaZulu-Natal)H-Index: 15
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BACKGROUND: Despite its many shortcomings, body mass index (BMI) is the most widely used screening tool for obesity, in part, because of its practicality. Other more physiologic measurements of obesity are based on body fat (BF). However, the correlation between BMI and BF has not been well-characterized, especially in patients with coronary heart disease (CHD). METHODS: We retrospectively studied 581 patients with CHD following major CHD events, who were divided according to BMI (calculated as ...
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Last. Marco Aurélio Peres (UFSC: Universidade Federal de Santa Catarina)H-Index: 43
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The rising prevalence of obesity and excessive adiposity are global public health concerns. Understanding determinants of changes in adiposity over time is critical for informing effective evidence-based prevention or treatment. However, limited information is available to achieve this objective. Cultural, demographic, environmental, and behavioral factors including socio-economic status (SES) likely account for obesity development. To this end, we related these variables to anthropometric measu...
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