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Sedentary Behavior and Prevalent Diabetes in 6,166 Older Women: The Objective Physical Activity and Cardiovascular Health Study
Abstract and Figures
Background We examined associations of sedentary time and sedentary accumulation patterns (i.e., how sedentary time is accumulated) with prevalent diabetes in an ethnically diverse cohort of older women. Methods Community-dwelling women aged 63-99 (n=6,116; median age=79) wore ActiGraph GT3X+ accelerometers 24 hours/day for up to seven days from which we derived average daily sedentary time and three measures of sedentary accumulation patterns: breaks in sedentary time, usual sedentary bout duration, and alpha. Odds ratios (ORs) and 95% confidence intervals (CIs) for prevalent diabetes were estimated using multivariable logistic regression. Results Twenty-one percent (n=1282) of participants had diabetes. Women in the highest quartile of sedentary time (≥10.3 hrs/day) had higher odds of diabetes (OR=2.18; 95% CI=1.77-2.70) than women in the lowest quartile (≤8.3 hrs/day). Prolonged accumulation patterns (i.e., accumulating sedentary time in longer sedentary bouts) was associated with higher odds of diabetes than regularly interrupted patterns [comparing quartiles with the most vs. least prolonged patterns: usual bout duration OR=1.57, 95% CI=1.28-1.92; alpha OR=1.61, 95% CI=1.32-1.97]; however, there was no significant association for breaks in sedentary time (OR=1.00, 95% CI=0.82-1.20). Conclusions High levels of sedentary time and accumulating it in prolonged patterns were associated with increased odds of diabetes among older women.
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