Table 1. Baseline demographic characteristics of 89 psoriasis patients with lesional and non-lesional skin biopsy samples, as well as 149 psoriasis patients and 162 healthy control subjects included in serum protein analysis.

	Psoriasis patients (n=89)	Psoriasis patients (n=149)	Healthy controls (n=162)
Age (years)	44.6±13.1	46.3±12.8	42.6±14.0
Male	66 (77.5%)	114 (76.5%)	89 (59.3%)
Caucasian	75 (84.3%)	133 (89.3%)	29 (22.5%)*
Current smoker	36 (40.4%)	50 (33.6%)	68 (62.4%)*
Obese	47 (52.8%)	73 (49.3%)	35(32.1%)**
Body surface area with psoriasis (%)	30±20.5	29.5±18.6	—
Psoriasis area and severity index score	21.5±10.8	21.3±9.0	—
Psoriatic arthritis	19 (21.3%)	38 (25.5%)	—

Data shown are number (%) of patients or mean±standard deviation.

^*P<0.0001.

^**P=0.0026.