Table 2.

Association of sleep duration and midday napping with type 2 diabetes.

		Model 1: crude		Model 2: adjusted∗
Variable	Cases/Total	OR (95% CI)	P value	OR (95% CI)	P value
Sleep duration, h/night
<6	38/549	1.21 (0.85–1.72)	0.290	6.71 (0.36–123.48)	0.200
6 to <7	87/1649	0.91 (0.70–1.17)	0.440	2.94 (0.17–50.32)	2.940
7 to <8	241/4162	1.00	–	1.00	–
8 to <9	218/3666	1.03 (0.85–1.24)	4.460	4.46 (0.37–53.31)	4.460
≥9	110/1513	1.27 (1.01–1.61)	0.040	0.00 (0.00)	1.000
Midday napping, min
0	596/9678	1.30 (0.53–3.20)	0.570	2.45 (0.33–17.96)	0.380
1–29	5/104	1.00	–	1.00	–
30–59	20/402	1.04 (0.38–2.83)	0.940	4.05 (0.50–33.18)	0.190
60–89	37/757	1.02 (0.39–2.65)	0.970	1.72 (0.20–14.40)	0.620
≥90	36/598	1.27 (0.48–3.31)	0.630	2.50 (0.30–20.70)	0.400

^∗Adjusted for age (continuous), sex, BMI (continuous), smoking status (current, former, or never), drinking status (current, former, or never), hypertension (yes or no), and hyperlipidemia (yes or no). BMI: Body mass index; CI: Confidence interval; OR: Odds ratio.