Table 2.

Comparison of the PSQI and its component scores with different levels of loneliness in Shandong, China (2016) (mean ± s)

Variables	Total score	Different levels of loneliness			F	P
		Low	Moderate	High
Total PSQI	6.67 ± 3.42	5.36 ± 2.83	6.69 ± 3.23	7.55 ± 3.89	38.104	0.000
Components of PSQI
Subjective sleep quality	1.14 ± 0.76	1.06 ± 0.64	1.17 ± 0.72	1.11 ± 0.91	2.680	0.069
Sleep latency	1.24 ± 0.90	0.90 ± 0.83	1.23 ± 0.91	1.48 ± 0.86	38.583	0.000
Sleep duration	0.61 ± 0.84	0.30 ± 0.62	0.58 ± 0.83	0.88 ± 0.91	45.337	0.000
Habitual sleep efficiency	0.84 ± 1.04	0.78 ± 1.01	0.85 ± 1.05	0.87 ± 1.05	0.840	0.432
Sleep disturbances	1.34 ± 0.67	1.21 ± 0.50	1.36 ± 0.61	1.38 ± 0.86	6.667	0.001
Use of sleeping medication	0.36 ± 0.76	0.17 ± 0.52	0.32 ± 0.69	0.59 ± 0.96	32.302	0.000
Daytime dysfunction	1.15 ± 0.78	0.94 ± 0.63	1.17 ± 0.71	1.23 ± 0.99	13.317	0.000