Table 3. The Chinese version of the Pittsburgh Sleep Quality Index global score and prevalence of poor sleep quality of participants by gender and age groups.

		N	CPSQI global score mean(95%CI)	p value	Poor sleep quality* prevalence (95%CI)	p value
Total		1086	5.6(5.4–5.8)		41.5(38.6–44.5)
Gender	Male	464	5.2(4.9–5.5)	<0.001	35.8(31.4–40.1)	<0.001
	Female	622	5.9(5.6–6.2)		45.8(41.9–49.7)
Age group	60-	455	4.8(4.5–5.1)	<0.001▽	32.1(27.8–36.4)	<0.001▽
	70-	412	5.9(5.6–6.3)		46.1(41.3–50.9)
	80-	219	6.6(6.1–7.2)		52.5(45.9–59.1)

^*Chinese version of the Pittsburgh Sleep Quality Index global score < = 5.

▽p value for trend.