Table 1. Characteristics in study groups at baseline among psoriasis and propensity score matched control group.

	Psoriasis n = 3,648	Control n = 14,592	P value
Age at index date, Mean ± SD	38.52±20.06	38.64±20.23	0.74
<20	722(19.79%)	2,880(19.74%)
20–39	1,310(35.91%)	5,224(35.80%)
40–59	1,010(27.69%)	4,062(27.84%)
>=60	606(16.61%)	2,426(16.63%)
Gender			0.98
Female	1,671(45.81%)	6,687(45.83%)
Male	1,977(54.19%)	7,905(54.17%)
Low income	49(1.34%)	175(1.20%)	0.48
Ocular co-morbidities
Cataract and cataract surgery	30(0.82%)	123(0.84%)	0.90
Uveitis	19(0.52%)	71(0.49%)	0.79
Glaucoma	68(1.86%)	257(1.76%)	0.67
Dry eye diseases	178(4.88%)	697(4.78%)	0.80
Modified Deyo-Charlson comorbidity index			0.96
0	2,436(66.78%)	9,732(66.69%)
1–2	906(24.84%)	3,610(24.74%)
3–4	207(5.67%)	829(5.68%)
>=5	99(2.71%)	421(2.89%)

SD = standard deviation