Table 1.

Clinical characteristics of 1,593 incident psoriasis subjects (January 1, 1970 through December 31, 1999, Olmsted County, Minnesota) without PsA at time of psoriasis diagnosis^*

	Total
Age, years
Mean ± SD	43.3 ± 17.1
Median (minimum, maximum)	39.8 (18.0, 98.2)
Sex
Men	796 (50)
Women	797 (50)
Type of psoriasis
Plaque	1,258 (79)
Guttate	130 (8.2)
Sebopsoriasis	86 (5.4)
Pustular	53 (3.3)
Unknown	97 (6.1)
Site of psoriasis
Scalp	662 (42)
Extremities	551 (35)
Trunk	312 (20)
Intergluteal/perianal	220 (14)
Face	171 (11)
Palms and/or soles	117 (7.3)
Axilla/groin	61 (3.8)
Unknown	126 (7.9)
Nail dystrophy	224 (14)

^*Values are the number (percentage) unless otherwise indicated.

PsA = psoriatic arthritis.