Table 2. The Relationships Between Pittsburgh Sleep Quality Items, Overall Sleep Quality, and Spiritual Health.

Variables	1	2	3	4	5	6	7	8	9
Subjective sleep quality	1
Quality during the incubation period of sleep	229, 0.006	1
Sleep duration	0.198, 0.019	0.615 < 0.001	1
Quality of sleep	0.237 < 0.001	0.966 < 0.001	0.494, 0.005	1
Sleep efficiency	0.313 < 0.001	0.993 < 0.001	0.628 < 0.001	0.975 < 0.001	1
Use of sleeping medications	0.075, 0.381	0.294 < 0.001	0.26, 0.002	0.228, 0.001	0.229 < 0.001	1
Abnormal daily performance	0.149, 0.079	0.254, 0.002	0.147, 0.043	0.233, 0.006	0.256, 0.002	0.3 < 0.001	1
Overall sleep quality	0.273 < 0.001	0.304 < 0.001	0.383 < 0.001	0.431 < 0.001	0.333 < 0.001	0.261 < 0.001	0.206 < 0.001	1
Spirituality	0.156, 0.32	0.061, 0.4	0.067, 0.35	0.155, 0.033	0.131, 0.07	0.066, 0.36	0.014, 0.85	0.149, 0.04	1