Table 1

Demographic and clinical characteristics of the study population

Psoriasis (N=404)PsA (N=728)p Value
Age, years*46.3 (13.1)36.9 (13.1)<0.0001
Sex: female, %177 (43.8%)297 (40.8%)0.34
Age at onset psoriasis, years30.2 (16.0)27.8 (14.5)0.01
Age at onset PsA, years36.9 (12.9)
Duration of psoriasis*16.1 (14.1)9.2±10.2<0.0001
PASI (maximum in 3 years)6.3 (6.1)8.8±10.2<0.0001
Severe psoriasis65 (16.9%)204 (29.1%)<0.0001
Alcohol consumption
 Daily38 (9.4%)80 (11.8%)0.32
 Social252 (62.5%)398 (58.4%)
Arthritis pattern at diagnosis
 Distal joints only51 (7.8%)
 Oligoarthritis232 (35.4%)
 Polyarthritis235 (35.9%)
 Axial only25 (3.8%)
 Axial + distal joints5 (0.8%)
 Axial + oligoarthritis37 (5.7%)
 Axial + polyarthritis70 (10.6%)
Total damaged joints3.0 (7.5)
  • * Determined at the time of the diagnosis of psoriatic arthritis (PsA) (for PsA patients) and at first study visit (for psoriasis patients).

  • PASI, psoriasis area severity index.