Lifestyle Factors and Risk for New-Onset Diabetes

Abstract

Background Epidemiologic data on the combined influence of several lifestyle factors on diabetes risk are rare, particularly among older adults. Objective Examine how combinations of lifestyle risk factors relate to the 11-year risk of incident diabetes. Design Population-based prospective cohort study. Setting National Institutes of Health (NIH)-AARP Diet and Health Study. Participants 114996 men and 92483 women aged 50–71 in 1995–1996 without evidence of heart disease, cancer, or diabetes. Measurements A comprehensive survey of demographic characteristics and lifestyle factors, including dietary intake, body weight and height, physical activity, smoking, and alcohol at baseline (1995–1996). Low-risk groups were formed by dichotomizing each lifestyle factor. Incident self-reported physician-diagnosed diabetes was identified with a follow-up survey in 2004–2006. Results There were 11031 (9.6%) men and 6969 (7.5%) women who developed new-onset diabetes. The odds for diabetes were 31% (odds ratio (OR): 0.69; 95% confidence interval (CI): 0.68, 0.71) lower for each 1 additional lifestyle factor in the low-risk group among men and 39% (OR: 0.61; 95% CI: 0.60, 0.63) lower among women. Men and women with a diet score, physical activity level, smoking status, and alcohol use all in the low-risk group had ORs for diabetes of 0.61 (95% CI: 0.56, 0.66) and 0.43 (95% CI: 0.34, 0.55), respectively. When absence of overweight or obesity was added, ORs for diabetes were 0.28 (95% CI: 0.23, 0.34) and 0.16 (95% CI: 0.10, 0.24) for men and women, respectively. Results did not differ by family history of diabetes and level of adiposity. Limitation The study was observational with potential for residual confounding. Conclusions Lifestyle factors, when considered in combination, are associated with a substantial reduction in risk for diabetes.

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