Table 1.

Demographic and background information of the patients under study

		Psoriasis	Psoriatic arthritis
Number		58	42
Sex, n (%)	Woman	34(53.1%)	30(46.9%)	P=0.188
	Man	24(66.7%)	12(33.3%)
Age , (years;mean±SD)		37.24±12.89	46.74±13.96	P=0.001
Duration of psoriasis , (years;mean±SD)		8.34±8.9	11.49±8.97	P=0.033
Family history of psoriasis, n (%)	Has	14(50%)	14(50%)	P=0.312
	Does not have	44(61.1%)	28(38.9%)
Arthritis, n (%)		4(6.9%)	42(100%)	_
Nail involvement, n (%)	Has	20(34.5%)	29(69%)	_
	Does not have	38(65.5%)	13(31%)
Dactylitis, n (%)	Has	0	6(14.3%)	_
	Does not have	58(100%)	36(85.7%)
Negative rheumatoid factor, n (%)		*-	34(81%)	_
New bone formation around the joint, n (%)		*-	16(34.8%)	_

*These values were not measured for the non-arthritic group.