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

Table 3 Distribution of depression scores among the patients, n (%)/mean ± SD

Variable	Number	SDS	Statistic	P value
Total	358 (100)	50.08 ± 5.52
Age (years)			t = -3.10	0.002
< 50	213 (59.50)	49.34 ± 5.51
≥ 50	145 (40.50)	51.16 ± 5.38
Gender			t = -1.71	0.088
Female	243 (67.88)	49.73 ± 5.62
Male	115 (32.12)	50.80 ± 5.25
Degree of education			t = -0.76	0.445
College or higher	77 (21.51)	49.65 ± 5.27
Below college	281 (78.49)	50.19 ± 5.59
Hypertension			t = -1.57	0.117
No	239 (66.76)	49.73 ± 5.14
Yes	119 (33.24)	50.76 ± 6.18
Diabetes			t = -2.26	0.025
No	283 (79.05)	49.74 ± 5.56
Yes	75 (20.95)	51.35 ± 5.23
Duration of illness			t = -3.35	< 0.001
< 12 months	188 (52.51)	49.16 ± 5.17
≥ 12 months	170 (47.49)	51.09 ± 5.73

SDS: Self-Rating Depression Scale.