Table I.

Baseline demographic data of the 275 participating psoriasis patients

	Percent (n)
Males (n)	47% (127)
Females (n)	53% (148)
Age, mean yr ± SD	42.3 ± 14.2
Age at psoriasis onset, mean yr ± SD	22.3 ± 13.4
Early onset psoriasis (onset before or at 40 years)	87% (240)
Late onset psoriasis (onset after the age of 40 years)	10% (27)
Psoriasis subtype:
Plaque psoriasis	75% (207)
Guttate psoriasis	8% (21)
Guttate and plaque psoriasis	14% (38)
Palmoplantar pustulosis (PPP)	1% (4)
Psoriasis nail changes	42% (116)
Psoriatic arthritis	20% (56)

n: number, SD: standard deviation