Table 2.
Nickel, cobalt, and chromium (+metal*) allergy stratified by patient status. Values are n (%) and (95% CI)
| n | Nickel allergy | Cobalt allergy | Chromium allergy | Metal allergya | |
|---|---|---|---|---|---|
| Adults from the general population (Thyssen et al. 2009c) | 3,460 | 204 (5.9) (5.2–6.8) | 8 (0.2) (0.1–0.5) | 5 (0.1) (0.1–0.3) | 345 (9.7) (9–11) |
| Dermatitis patients from between 1977 and 2009 (Thyssen et al. 2010) | 22,506 | 2,341 (10.4) (10–10.8) | 856 (3.8) (3.6–4.1) | 608 (2.7) (2.5–2.9) | Not available |
| Dermatitis patients who underwent knee arthoplasty | 327 | 39 (12) (8.9–16) | 9 (2.8) (1.5–5.1) | 14 (4.3) (2.6–7.1) | 50 (15) (12–20) |
| Dermatitis patients who underwent knee arthoplasty but not revision surgery | 295 | 37 (13) (9.2–16) | 12 (4.1) (2.3–7) | 8 (2.7) (1.4–5.3) | 46 (16) (12–20) |
| Dermatitis patients who underwent knee arthoplasty and had revision surgery | 32 | 2 (6.3) (1.7–20) | 2 (6.3) (1.7–20) | 1 (3.1) (0.6–16) | 4 (13) (5–28) |
a
defined as nickel, cobalt, and/or chromium allergy.