Table 2: The characteristics of the groups of patients with PsA and psoriasis (PsO). The results are presented respectively as an average, standard deviation and median.

–	PsA Patients (n=44)	PsO Patients (n=51)	p
Age (in years)	40,72± 5,87;41,0	38,4±6,19;38	0,06
Sex (f/m)	16/28	23/28	0,39
Duration of psoriasis (in years)	15,3±10,3;14,5	13,1±8,3;12,0	0,42
Age of psoriasis recognition (in years)	25,3±10,7;26,0	24,7±10,1;22,0	0,77
Patients with severe psoriasis	21 (48%)	18 (35%)	0,09