Association of physical activity, sedentary time, and sleep duration on the health-related quality of life of college students in Northeast China

Table 4 PCS and MCS scores of Chinese college students according to different groups of sleep duration ^a

Sleep duration	N	PCS ^b	P value	MCS ^c	P value
Total			0.732		0.006*
< 7 h/day	58	49.16 (7.65)		48.30 (10.42)
7–< 8 h/day	274	50.35 (7.71)		48.96 (9.29)
8–< 9 h/day	463	49.86 (8.13)		50.21 (9.33)
≥9 h/day	131	50.12 (9.01)		52.20 (9.99)
Male			0.531		0.004*
< 7 h/day	27	49.95 (7.92)		49.21 (10.15)
7–< 8 h/day	87	51.68 (8.26)		47.71 (10.20)
8–< 9 h/day	146	50.16 (8.10)		51.08 (9.73)
≥9 h/day	48	50.22 (8.43)		54.16 (11.09)
Female			0.828		0.296
< 7 h/day	31	48.48 (7.47)		47.50 (10.75)
7–< 8 h/day	187	49.73 (7.39)		49.54 (8.80)
8–< 9 h/day	317	49.73 (8.16)		49.80 (9.13)
≥9 h/day	83	50.07 (9.37)		51.06 (9.17)

^a Values are presented as mean (SD). ^b PCS: physical component summary. ^c MCS: mental component summary. ^*P < 0.05

ISSN: 1477-7525