Table 1.

Summary statistics of global PSQI (Pittsburgh Sleep Quality Index) scores by sex and 5-year age groups among 3732 participants aged ≥65 years

	Age	No.	Mean	SD	Prevalence (%)a
Men
	65–69	612	4.37	2.62	28.1
	70–74	670	4.62	2.83	30.9
	75–79	388	4.78	2.95	31.7
	80≤	212	5.04	3.09	36.3
	Subtotal	1882	4.62	2.83	30.8
Women
	65–69	670	5.26	3.16	37.9
	70–74	606	5.49	3.17	41.4
	75–79	385	5.65	3.44	43.4
	80≤	189	5.82	3.24	50.3
	Subtotal	1850	5.47	3.23	41.5

Scores range from 0 to 21

^aGlobal PSQI score >5.5