Table 5.

Analysis of correlation between sleep quality and depressive symptoms (n = 296).

	Control variable	1	2	3	4	5	6	7	8
1	Age	1.000
2		0.458**	1.000
3		0.291**	0.185**	1.000
4		0.246**	0.220**	0.141	1.000
5		0.370**	0.182**	0.123	0.160**	1.000
6		0.209**	0.112	0.124	0.029	0.224**	1.000
7		0.493**	0.267**	0.194**	0.056	0.169**	0.334**	1.000
8		0.520**	0.366**	0.170**	0.125	0.402**	0.349**	0.443**	1.000

^**p < 0.01. 1, Perceived sleep quality; 2, Sleep latency; 3, Sleep duration; 4, Sleep efficiency; 5, Sleep disturbance; 6, Use of sleep medication; 7, Daytime dysfunction; 8, PHQ-9.