Correlation of ocular surface function with sleep quality, anxiety, and depression in patients with dry eye disease

Table 6 Multiple linear regression analysis

Variables	β	SE	t	P value	β (95%CI)	VIF
Intercept	10.60	4.27	2.48	0.014	10.60 (2.23-18.97)
Age (years)
< 50					Reference1
≥ 50	1.55	0.71	2.19	0.029	1.55 (0.16-2.93)	1.040
PSQI	0.58	0.16	3.59	< 0.001	0.58 (0.26-0.90)	1.070
SAS	0.17	0.07	2.40	0.017	0.17 (0.03-0.31)	1.048
SDS	0.15	0.06	2.36	0.019	0.15 (0.03-0.28)	1.082
R2	0.112
F value	F(4, 353) = 11.094, P < 0.001
Durbin-Watson value	2.007

¹Reference group.

PSQI: Pittsburgh Sleep Quality Index; SAS: Self-Rating Anxiety Scale; SDS: Self-Rating Depression Scale; CI: Confidence interval; VIF: Variance inflation factor.