Table 2

ORs (95% CI) of diabetes diagnosed after 2000 according to hours of day napping or night sleeping

Day napping*Night sleeping
None<1 h≥1 h<5 h5–6 h7–8 h≥9 h
n of cases4,4654,4631,1723903,4275,965348
Basic model†1.01.23 (1.18–1.29)1.55 (1.45–1.66)1.46 (1.31–1.63)1.11 (1.06–1.16)1.01.11 (0.99–1.24)
+ physical activities1.01.23 (1.18–1.29)1.53 (1.42–1.64)1.47 (1.31–1.64)1.11 (1.06–1.16)1.01.09 (0.97–1.22)
+ BMI1.01.16 (1.11–1.21)1.37 (1.28–1.47)1.33 (1.19–1.49)1.06 (1.01–1.11)1.01.10 (0.98–1.23)
+ physical activities and BMI1.01.16 (1.11–1.21)1.36 (1.27–1.46)1.34 (1.20–1.50)1.06 (1.01–1.11)1.01.09 (0.97–1.22)
n991842126376011,26264
OR (95% CI)1.01.16 (1.06–1.28)1.34 (1.10–1.63)1.37 (0.97–1.93)1.15 (1.04–1.27)1.01.18 (0.91–1.53)
  • Data are ORs (95% CI).

  • *All Ptrend < 0.0001 in the day napping and diabetes analysis with the exception of sensitivity analysis (Ptrend = 0.0002). No trend test was conducted for hours of night sleeping because the relationship was not linear.

  • †The basic model included the following covariates: age, sex, race, education, marital status, smoking, coffee and alcohol consumption, calorie intake, family history of diabetes, and general health status.

  • ‡The sensitivity analysis was based on the full model and was limited to participants who met all of the following criteria: excellent or very good health status, never smokers or stopped >10 years ago, nonobese (BMI <30 kg/m2), and >1 h of moderate to vigorous physical activities per week in the past 10 years.