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Table 5 Adjusted hazard ratios for diabetes in relation to daytime napping among postmenopausal and premenopausal females

From: Association of daytime napping in relation to risk of diabetes: evidence from a prospective study in Zhejiang, China

  N. of participants N. of incident diabetes Model1 Model2 Model3 Model4
    HR (95% CI) HR (95% CI) HR (95% CI) HR (95% CI)
Postmenopausal females       
 Non-napping 11,047 849 1 1 1 1
 Napping only in summer 5192 443 1.12 (0.99–1.25) 1.10 (0.98–1.24) 1.07 (0.95–1.20) 1.04 (0.93–1.17)
 Habitual daytime napping 581 67 1.55 (1.20–1.97) 1.50 (1.15–1.92) 1.44 (1.11–1.85) 1.41 (1.08–1.80)
Premenopausal females       
 Non-napping 10,199 494 1 1 1 1
 Napping only in summer 3767 197 1.03 (0.87–1.21) 1.03 (0.87–1.21) 1.02 (0.86–1.21) 1.01 (0.85–1.20)
 Habitual daytime napping 557 34 1.27 (0.88–1.77) 1.28 (0.88–1.79) 1.16 (0.80–1.62) 1.13 (0.78–1.59)
  1. Model 1, adjusted for age. Model 2, further adjusted for education level (no formal education, primary school, middle school, and high school or above), household income (< 19,999 yuan, 20,000–34,999 yuan, and ≥ 35,000 yuan), marital status, cigarettes consumption (never, occasional, former, and current regular), alcohol consumption (never, occasional, former, and current regular), meat, fresh fruits, and fresh vegetables consumption (daily and non-daily), physical activity (continuous) and sleep duration (continuous). Model 3, further adjusted for and BMI (continuous) and WC (continuous). Model 4, further adjusted for snoring (none, occasional, and habitual)
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