alexa Body mass, fitness and survival in veteran patients: another obesity paradox?
Bioinformatics & Systems Biology

Bioinformatics & Systems Biology

Journal of Glycomics & Lipidomics

Author(s): McAuley P, Myers J, Abella J, Froelicher V

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Abstract PURPOSE: The paradox of obesity in patients with heart failure (HF) also has been observed in non-HF veteran patients. Veterans had to have met military fitness requirements at the time of their enlistment. Therefore, we assessed the relation of body mass index (BMI) to mortality in a clinical cohort of non-HF veterans, adjusting for fitness. METHODS: After excluding HF patients (n=580), the study population comprised 6876 consecutive patients (mean age 58 [+/-11] years) referred for exercise testing. Patients were classified by BMI category: normal weight (BMI 18.5-24.9 kg/m2), overweight (BMI 25.0-29.9 kg/m2), or obese (BMI > or =30.0 kg/m2). The association between BMI, fitness, other clinical variables, and all-cause mortality was assessed by Cox proportional hazards analysis. RESULTS: During a mean (+/-SD) follow-up of 7.5+/-4.5 years, a total of 1571 (23\%) patients died. In a multivariate analysis including clinical, risk factor, and exercise test data, higher BMI was associated with better survival. Expressing the data by BMI category, obese patients were 22\% less likely to die (relative risk [RR]=0.78, 95\% confidence interval [CI], 0.69-0.90, P<.001) than patients of normal weight. After further adjustment for cardiorespiratory fitness (CRF), this relationship strengthened such that mortality risk for the obese category was 35\% lower (RR=0.65, 95\% CI, 0.57-0.76, P<.001), versus the normal weight category. CONCLUSIONS: As has been observed in HF patients, obesity was associated with a substantially lower mortality risk in a clinical population of non-HF veterans. Higher CRF and obesity in later life may account for an obesity paradox in this population. This article was published in Am J Med and referenced in Journal of Glycomics & Lipidomics

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