Characteristics of people with psoriasis from an adult general population sample
| No psoriasis | Any psoriasis | Self-reported psoriasis | Physician diagnosed psoriasis | |||
| Any physician | Non-dermatologist | Dermatologist | ||||
| (n=3174) | (n=275) | (n=54) | (n=221) | (n=70) | (n=151) | |
| Age, n (%) | ||||||
| 18–24 years | 239 (7.5) | 13 (4.7) | 4 (7.4) | 9 (4.1) | 4 (5.7) | 5 (3.3) |
| 25–34 years | 312 (9.8) | 27 (9.8) | 7 (13.0) | 20 (9.1) | 4 (5.7) | 16 (10.6) |
| 35–44 years | 414 (13.0) | 28 (10.2) | 6 (11.1) | 22 (10.0) | 6 (8.6) | 16 (10.6) |
| 45–54 years | 567 (17.9) | 28 (10.2) | 9 (16.7) | 41 (18.6) | 15 (21.4) | 26 (17.2) |
| 55–64 years | 615 (19.4) | 57 (20.7) | 9 (16.7) | 48 (21.7) | 15 (21.4) | 33 (21.9) |
| 65–74 years | 646 (20.4) | 72 (26.2) | 13 (24.1) | 59 (26.7) | 16 (22.9) | 43 (28.5) |
| ≥75 years | 381 (12.0) | 28 (10.2) | 6 (11.1) | 22 (10.0) | 10 (14.3) | 12 (8.0) |
| Sex, n (%) | ||||||
| Women | 1756 (55.3) | 158 (57.5) | 26 (48.2) | 132 (59.7) | 36 (51.4) | 96 (63.6) |
| Men | 1418 (44.7) | 117 (42.6) | 28 (51.9) | 89 (40.3) | 34 (48.6) | 55 (36.4) |
| Family history of psoriasis, n (%) | ||||||
| Any family member | 434 (13.7) | 122 (44.4) | 19 (25.2) | 103 (46.6) | 32 (45.7) | 71 (47.0) |
| Sibling | 120 (3.8) | 39 (14.6) | 7 (13.7) | 32 (14.8) | 15 (21.7) | 17 (11.5) |
| Mother | 115 (3.7) | 39 (11.2) | 4 (7.8) | 26 (12.0) | 8 (12.6) | 18 (12.2) |
| Father | 92 (2.9) | 40 (14.9) | 7 (13.7) | 33 (15.2) | 9 (13.0) | 4 (16.2) |
| Grandparent | 63 (2.0) | 35 (13.1) | 2 (3.9) | 33 (15.2) | 5 (7.3) | 28 (18.9) |
| Children | 96 (3.1) | 14 (5.2) | 3 (5.9) | 11 (5.1) | 3 (4.4) | 8 (5.4) |
| More than one family member | 47 (1.5) | 31 (11.3) | 4 (7.4) | 12 (12.2) | 7 (10.0) | 20 (13.3) |
| Age at psoriasis onset, mean (SD) | – | 32 (21) | 32 (24) | 32 (20) | 37 (23) | 31 (20) |
| Flares in last 12 months, n (%) | ||||||
| None | – | 108 (39.3) | 25 (46.3) | 83 (37.6) | 29 (42.4) | 54 (35.8) |
| one flare | – | 33 (12.0) | 5 (9.3) | 28 (12.7) | 6 (8.6) | 22 (14.6) |
| two to five flares | – | 64 (23.3) | 9 (16.7) | 55 (24.9) | 18 (25.7) | 37 (24.5) |
| 6–10 flares | – | 25 (9.1) | 4 (7.4) | 21 (9.5) | 5 (7.1) | 5 (7.1) |
| >10 flares | – | 26 (9.5) | 4 (7.4) | 22 (10.0) | 7 (10.0) | 15 (9.9) |
| Unknown | – | 19 (6.9) | 7 (13.0) | 12 (5.4) | 5 (7.1) | 7 (4.6) |
| Current psoriasis severity, n (%) | ||||||
| Mild psoriasis (BSA<3) | – | 178 (64.7) | 37 (68.5) | 141 (63.8) | 46 (65.7) | 95 (62.9) |
| Moderate psoriasis (BSA 3–10) | – | 53 (19.3) | 7 (13.0) | 46 (20.8) | 11 (11.7) | 35 (23.2) |
| Severe psoriasis (BSA>10) | – | 32 (11.6) | 6 (11.1) | 26 (11.8) | 8 (11.4) | 18 (11.9) |
| Unknown | – | 12 (4.4) | 4 (7.4) | 8 (3.6) | 5 (7.1) | 3 (2.0) |
| Current DLQI, mean (SD) | 0.9 (2.1) | 2.3 (3.7) | 2.4 (4.4) | 2.3 (3.6) | 2.0 (3.3) | 2.4 (3.7) |
| Joint pain (NRS 0–10) in last 7 days, mean (SD) | 2.7 (2.8) | 3.3 (2.8) | 3.2 (3.0) | 3.3 (2.8) | 3.5 (2.8) | 3.2 (2.8) |
BSA, body surface area; DLQI, Dermatology Life Quality Index; NRS, numerical rating scale.