Short sleep duration associated with the incidence of cardio-cerebral vascular disease: a prospective cohort study in Shanghai, China

Table 2 Association between sleep duration and cardiovascular disease incidence in cohort participants

Sleep duration (h)	Person-years	Incident cases	Incidence (per 1000 person-years; 95% CI)	Hazard ratio (95% CI)	p
CCVD
≤5	1949	73	37.45 (29.02–45.88)	1.83 (1.32–2.54)	< 0.001
6	3748	74	19.74 (15.29–24.20)	0.97 (0.71–1.33)	0.848
7 (ref.)	4470	81	18.12 (14.21–22.03)	1.00
8	6440	103	15.99 (12.93–19.06)	0.94 (0.70–1.25)	0.657
≥ 9	1840	39	21.19 (14.61–27.77)	1.20 (0.82–1.75)	0.357
CHD
≤5	1996	46	23.05 (16.46–29.63)	1.82 (1.21–2.75)	0.004
6	3786	46	12.15 (8.66–15.64)	0.98 (0.65–1.46)	0.910
7 (ref.)	4516	51	11.29 (8.21–14.38)	1.00
8	6518	59	9.05 (6.75–11.35)	0.84 (0.58–1.22)	0.368
≥ 9	1866	28	15.01 (9.49–20.53)	1.37 (0.86–2.17)	0.185
Stroke
≤5	2012	34	16.9 (11.27–22.53)	1.82 (1.12–2.98)	0.017
6	3817	32	8.38 (5.49–11.28)	0.91 (0.57–1.47)	0.708
7 (ref.)	4538	36	7.93 (5.35–10.51)	1.00
8	6508	50	7.68 (5.56–9.80)	1.04 (0.68–1.60)	0.847
≥ 9	1871	17	9.09 (4.79–13.39)	1.15 (0.65–2.04)	0.629

Hazard ratios and 95% CIs are adjusted for age, sex, marriage status, smoking status, drinking status, tea consumption, physical activity, hypertension, diabetes, dyslipidemia, BMI, CRP and sleep quality

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