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Table 1 Sample characteristics at baseline: controls, patients with active and inactive psoriasis

From: Validation of a new tool to assess health-related quality of life in psoriasis: the PSO-LIFE questionnaire

  Patients (active psoriasis)N = 182 Patients (inactive psoriasis)N = 122 Controls N = 56 P**
Socio-demographic variables
Age, mean (SD), years 43.6 (14.7) 47.8 (14.0) 38.8 (14.0) <0.01
Male, n (%) 101 (55.5) 70 (57.4) 29 (51.8) 0.54
Highest educational level, n (%)     <0.01
No formal education 5 (2.8) 4 (3.3) 4 (7.1)  
Primary 66 (36.9) 46 (38.0) 11 (19.6)  
Secondary 62 (34.6) 45 (37.2) 15 (26.8)  
Post-secondary 46 (25.7) 26 (21.5) 26 (46.4)  
Employment status, n (%)     <0.05
Unemployed 19 (10.4) 12 (9.8) 6 (10.7)  
Working – self-employed 26 (14.3) 11 (9.0) 10 (17.9)  
Working – employed 87 (47.8) 59 (48.4) 28 (50.0)  
Work disability 1 (0.5) 4 (3.3) 1 (1.8)  
Pensioner/retired 19 (10.4) 25 (20.5) 3 (5.4)  
Looking after home 22 (12.1) 9 (7.4) 7 (12.5)  
Student 9 (4.9) 5 (4.1) 7 (12.5)  
Clinical variables
Years since diagnosis, mean (SD) 18.6 (12.4) 17.8 (11.9)   NS
PASI, n (%)     <0.01
Mild (<10) 31 (17.0%) 98 (80.3%)   
Moderate/severe ≥ 10 151 (83.0%) 24 (19.7%)   
Treatment*     
Any 177 (97.3%) 104 (85.2%)   <0.01
Topical 90 (49.5%) 44 (36.1%)   <0.05
PUVA/Phototherapy 25 (13.7%) 10 (8.2%)   NS
Systemic 101(55.5%) 54 (44.3%)   NS
Biological 57 (31.3%) 59 (48.4%)   <0.01
Other 32 (17.6%) 9 (7.4%)   0.01
  1. PASI: Psoriasis Area Severity Index.
  2. *Multi-response. The same patient could be in more than one category. Calculation performed for N = 304 (all patients).
  3. **Statistically significant differences between patients and controls in proportion of Pensioners/retired.