Table 1.
Participant characteristics.
| Characteristics | Healthy controls (n=287) | Patients with psoriasis (n=220) | P value | ||
| Age (years), mean (IQR) | 39 (23-55) | 49 (38-58) | <.001 | ||
| Gender, n (%) | .4 | ||||
|
|
Female | 208 (72) | 158 (72) |
|
|
|
|
Male | 76 (26) | 62 (28) |
|
|
|
|
Other | 3 (1) | 0 (0) |
|
|
| Country, n (%) | .05 | ||||
|
|
United Kingdom | 119 (41) | 91 (41) |
|
|
|
|
Canada | 93 (32) | 80 (36) |
|
|
|
|
United States | 36 (13) | 27 (12) |
|
|
|
|
Ireland | 36 (13) | 14 (6.4) |
|
|
|
|
Othera | 3 (1) | 8 (3.6) |
|
|
| Living with psoriasis (years), mean (IQR) | N/Ab | 18 (6-30) |
|
||
| Comorbidities, n (%) | |||||
|
|
Any | 178 (62) | 145 (66) | .4 | |
|
|
None | 109 (38) | 75 (34) | .4 | |
|
|
Depression | 91 (32) | 61 (28) | .3 | |
|
|
Eczema | 20 (7) | 18 (8.2) | .6 | |
| Self-perceived severity of psoriasis, n (%) | N/A | ||||
|
|
Moderate | N/A | 126 (57) |
|
|
|
|
Mild | N/A | 64 (29) |
|
|
|
|
Severe | N/A | 30 (14) |
|
|
aOther countries: Denmark, Iran, Italy, Mauritius, New Zealand, and South Africa.
bN/A: not applicable.