Table 3.

Impact of sleep duration on depression at 3 months after stroke.

Sleep duration (hour)	Odds ratio (95% confidence interval, P-value)
Total (n = 1,446)	Model 1	Model 2	Model 3
6–7	0.93 (0.65–1.31, 0.67)	0.92 (0.65–1.31, 0.67)	0.92 (0.64–1.30, 0.64)
5–6	1.65 (1.13–2.41, <0.01)	1.60 (1.10–2.35, 0.01)	1.47 (1.00–2.17, 0.04)
<5	3.28 (2.02–5.32, <0.01)	3.10 (1.89–5.07, <0.01)	3.05 (1.85–5.02, <0.01)
P for trend	P < 0.01	P < 0.01	P < 0.01
Male (n = 1,056)
6–7	1.08 (0.72–1.62, 0.68)	1.07 (0.71–1.61, 0.72)	1.08 (0.72–1.63, 0.68)
5–6	1.46 (0.92–2.30, 0.10)	1.41 (0.89–2.23, 0.14)	1.35 (0.85–2.15, 0.19)
<5	3.23 (1.80–5.81, <0.01)	3.09 (1.71–5.60, <0.01)	3.11 (1.71–5.66, <0.01)
P for trend	P < 0.01	P < 0.01	P < 0.01
Female (n = 390)
6–7	0.61 (0.30–1.22, 0.16)	0.70 (0.34–1.44, 0.33)	0.65 (0.30–1.40, 0.25)
5–6	2.17 (1.10–4.29, 0.02)	2.31 (1.13–4.69, 0.02)	1.68 (0.78–3.59, 0.18)
<5	3.35 (1.42–7.91, <0.01)	3.60 (1.39–9.30, <0.01)	2.96 (1.09–7.97, 0.03)
P for trend	P < 0.01	P < 0.01	P = 0.03
P for interaction*	P = 0.24	P = 0.25	P = 0.29

Model 1: Adjusted for age and gender.

Model 2: Adjusted for Model 1 + marital status, education, monthly income, current smoker, current drinker, physical activity, body mass index, history of hypertension, hyperlipidemia, diabetes, heart disease, and migraine.

Model 3: Adjusted for Model 2 + NIHSS and ward type/specialty during hospitalization.

^*P for interaction: analyses were stratified by gender.