I S Okosun1, S Choi, M M Dent, T Jobin, G E Dever. 1. Department of Community Medicine, Mercer University School of Medicine 1550 College Street Macon, GA 31207, USA. okosun_i@mercer.edu
Abstract
OBJECTIVE: Waist circumference (WC) cut-points of > or =102 cm and > or =88 cm for men and women, respectively, representing abdominal obesity have been recommended for determining obesity related co-morbidities. However, these cut-points carry the component of generalised obesity estimated by body mass index (BMI). The aim of this investigation was to determine whether abdominal obesity free of the influence of overall heaviness is associated with increased risk of hypertension in a representative sample of white and black Americans. METHODS: Data (n = 11114) from the Third US National Health and Nutrition Examination Survey were used in this investigation. Standardised residual values from the linear regression of WC on BMI were used to define abdominal obesity status. The risk of hypertension associated with abdominal obesity was estimated from the logistic regression model, adjusting for age, smoking and alcohol. We also estimated the public health consequences of abdominal obesity from the population attributable fraction of hypertension. RESULTS: Relative to white, black race/ethnicity was associated with approximately 1.8 and approximately 2.7 greater risk of hypertension in men and women, respectively, adjusting for abdominal obesity, age, smoking and alcohol consumption. Having larger than expected waist girths were associated with 1.58 and 1.39 increased risk of hypertension in black men and black women, respectively, adjusting for confounders. Population attributable risks of hypertension due to abdominal obesity were approximately 24.9% and 15.9%, in black men and black women, respectively. CONCLUSIONS: In Americans, hypertension is a public health problem that is closely linked to abdominal adiposity. An important research challenge therefore is to determine the best way to regulate body weight under conditions of food abundance. There is a need to clarify how lifestyle habits promote large waist sizes leading to abdominal adiposity and associated cardiovascular disease in the US, particularly among black Americans.
OBJECTIVE: Waist circumference (WC) cut-points of > or =102 cm and > or =88 cm for men and women, respectively, representing abdominal obesity have been recommended for determining obesity related co-morbidities. However, these cut-points carry the component of generalised obesity estimated by body mass index (BMI). The aim of this investigation was to determine whether abdominal obesity free of the influence of overall heaviness is associated with increased risk of hypertension in a representative sample of white and black Americans. METHODS: Data (n = 11114) from the Third US National Health and Nutrition Examination Survey were used in this investigation. Standardised residual values from the linear regression of WC on BMI were used to define abdominal obesity status. The risk of hypertension associated with abdominal obesity was estimated from the logistic regression model, adjusting for age, smoking and alcohol. We also estimated the public health consequences of abdominal obesity from the population attributable fraction of hypertension. RESULTS: Relative to white, black race/ethnicity was associated with approximately 1.8 and approximately 2.7 greater risk of hypertension in men and women, respectively, adjusting for abdominal obesity, age, smoking and alcohol consumption. Having larger than expected waist girths were associated with 1.58 and 1.39 increased risk of hypertension in black men and black women, respectively, adjusting for confounders. Population attributable risks of hypertension due to abdominal obesity were approximately 24.9% and 15.9%, in black men and black women, respectively. CONCLUSIONS: In Americans, hypertension is a public health problem that is closely linked to abdominal adiposity. An important research challenge therefore is to determine the best way to regulate body weight under conditions of food abundance. There is a need to clarify how lifestyle habits promote large waist sizes leading to abdominal adiposity and associated cardiovascular disease in the US, particularly among black Americans.
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