Table 2.

Incidence rates and relative risks (95% confidence intervals) of all-cause death and cardiovascular disease event during median 15.9 years of follow-up according to habitual sleep hour In 1990-91 for the CCCC study participants

	Sleep Time
All-cause death	≤ 5 h		6 h		7 h		8 h		≥ 9 h
Cases	108		165		215	240		173
Person-year	4816		9926		13787	14943		5119
Rates(/1000)	22.4		16.6		15.6	16.1		33.8
	RR	95% CI	RR	95% CI	RR	RR	95% CI	RR	95% CI	P*
Model 1	1.15	(0.91–1.45)	1.02	(0.83–1.25)	1.00	1.05	(0.88–1.27)	1.43	(1.16–1.75)	0.019
Model 2	1.19	(0.94–1.50)	1.03	(0.84–1.26)	1.00	1.06	(0.88–1.27)	1.39	(1.13–1.71)	0.06
Model 3	1.15	(0.90–1.46)	0.97	(0.79–1.21)	1.00	1.04	(0.86–1.27)	1.34	(1.08–1.67)	0.06
CVD event
Cases	45		82		102	123		68
Person-year	4643		9656		13355	14543		4936
Rates(/1000)	9.7		8.5		7.6	8.5		13.8
	RR	95% CI	RR	95% CI	RR	RR	95% CI	RR	95% CI	P*
Model 1	1.04	(0.73–1.49)	1.09	(0.81–1.46)	1.00	1.16	(0.89–1.51)	1.38	(1.01–1.89)	0.041
Model 2	1.02	(0.71–1.46)	1.05	(0.78–1.41)	1.00	1.13	(0.86–1.48)	1.34	(0.97–1.83)	0.046
Model 3	0.94	(0.65–1.35)	0.91	(0.67–1.24)	1.00	1.05	(0.80–1.39)	1.12	(0.81–1.55)	0.10

^*test for trend

Model 1: adjusted for age groups (35-44, 45-54, 55-64, 65-74, ≥ 75 years old) and gender

Model 2: Model 1 plus BMI (< 18, 18-20.9, 21-22.9, 23-24.9, ≥ 25), smoking (yes/no or abstinence), current alcohol drinking (regular/no), marital status(single, married and living with spouse, or divorced and separate), education level (< 9 years, ' 9 years), occupation (no work, manual or office job), regular exercise (yes vs. no), family history of coronary heart disease

Model 3: Model 2 plus baseline hypertension (yes/no), diabetes (yes/no), cholesterol, HDL, triglyceride, glucose, and uric acid level