Table 1 Characteristics of included studies
Source | Study location | Study Design | Case Group | Control Group | OR (95% CI) | ||
|---|---|---|---|---|---|---|---|
Psoriasis cases | Hepatitis C cases (%) | Control cases | Hepatitis C cases (%) | ||||
Chouela et al. [22] | Argentina | Cross-sectional | 118 (75 men, 43 women) patients with psoriasis | 9/118 (7.6%) | 60,000 blood donors | 720/60000 (1.2%) | 6.79 (3.43–13.46) |
Carlo et al. [23] | Italy | Case–control | 100 patients with psoriatic arthritis | 1/100 (1%) | 100 patients with from peripheral osteoarthritis (OA) or sciatica due to L4 L5 or L5 S1 herniated disc (two HCV unrelated disorders | 4/100 (4%) | 0.24 (0.117–0.492) |
Arnon et al. [24] | Israel | Case–control | 12,502 psoriasis patients | 129/12502 (1.03%) | 24,287 age- and sex- matched controls | 135/24287 (0.56%) | 1.86 (1.46–2.38) |
Tsai et al. [25] | Taiwan | Case–control | 51,800 Patients with psoriasis (31 923 males and 19,877 females) | 184/51800 (0.36%) | 207,200 Controls matched for age, sex, and urbanization level of residential area | 404/207200 (0.19%) | 2.02 (1.67–2.43) |
Andrade et al. [26] | Brasil | Cross-sectional | 140 patients with psoriasis | 10/140 (7.1%) | 2,675,000 people in the city of Salvador | 40,125/2675000 (1.5%) | 5.05 (2.655–9.611) |
Kanada et al. [27] | US | Cross-sectional | 148 patients with psoriasis | 1/148 (0.6%) | 5717 Non-psoriasis | 125/5717 (2.2%) | 0.24 (0.03–2.01) |
Brazzelli et al. [28] | Italy | Cross-sectional | 168 patients with psoriasis | 14/168 (7.7%) | 6917 people from northern Italian towns | 221/6917 (3.2%) | 2.75 (1.57–4.83) |
Shinichi et al. [29] | Japan | Cross-sectional | 717 (482 men, 235 women) patients with psoriasis | 54/717 (7.5%) | 38,057 (17,926 men and 20,131 women) patients with other dermatological diseases | 1239/38057 (3.3%) | 2.42 (1.82–3.21) |
Randa et al. [30] | Egypt | Cross-sectional | 100 Patients with psoriasis | 19/100 (19%) | 200 healthy volunteers | 17/200 (8.5%) | 1.14 (0.56–2.35) |
Orrell et al. [31] | US | Cross-sectional | 2590 people with psoriasis | 34/2590 (1.3%) | 112,265 people without psoriasis | 1830/112265 (1.6%) | 0.8 (0.57–1.13) |
Noe et al. [32] | UK | Cross-sectional | 188,664 Patients with mild psoriasis | 320/188664 (0.17%) | 961,888 matched controls | 1154/961888 (0.12%) | 1.88 (1.10–3.51) |