Table 6. Association between sleep quality and health-related QoL in cancer patients (n=333)

SF-36 domains	Level of sleep quality
	Good sleepers (PSQI: 0−5 points)	Poor sleepers (PSQI: 6−16 points)	Overall SF-36	P-value
	(n=181)	(n=152)	(n=333)
PF	52.48±34.21	34.47±26.95	44.26±32.34	<0.001
RP	40.33±44.83	8.55±23.91	25.82±40.01	<0.001
BP	61.51±24.10	42.90±22.35	53.02±25.07	<0.001
GH	53.76±18.05	41.82±17.11	48.31±18.58	<0.001
VT	54.58±19.23	40.88±17.18	48.33±19.53	<0.001
SF	62.63±25.65	46.62±23.59	55.33±25.95	<0.001
RE	47.14±45.94	15.57±33.42	32.73±43.59	<0.001
MH	62.29±15.81	51.84±14.75	57.52±16.17	<0.001
PCS	40.20±10.08	33.21±8.06	36.07±9.56	<0.001
MCS	43.54±8.25	38.20±7.52	40.38±8.24	<0.001

Values are presented as mean±SD.
QoL, quality of life; SF-36, Short Form-36; PSQI, Pittsburgh Sleep Quality Index; PF, physical function; RP, role difficulty (physical); BP, bodily pain; GH, general health; VT, vitality; SF, social function; RE, role difficulty (emotional); MH, mental health; PCS, physical component summary; MCS, mental component summary.