| Outcome | Number | Per cent with outcome |
RR (95% CI) |
NNH (95% CI) |
||
| Studies | Participants | 8% Capsaicin | Control | |||
| Group 1 | ||||||
| Erythema | 4 | 1355 | 75 | 57 | 1.4 (1.3 to 1.5) | 5.5 (4.3 to 7.7) |
| Pain | 4 | 1355 | 69 | 29 | 2.3 (2.0 to 2.6) | 2.5 (2.2 to 2.8) |
| Papules | 3 | 1312 | 6.3 | 2.0 | 3.6 (1.9 to 6.9) | 23 (16 to 46) |
| Pruritus | 3 | 1312 | 3.7 | 2.0 | 2.0 (0.98 to 4.0) | Not calculated |
| Oedema | 3 | 1312 | 3.9 | 1.2 | 3.0 (1.4 to 6.2) | 38 (23 to 110) |
| Group 2 | ||||||
| Erythema | 1 | 129 | 5.3 | 0 | Not calculated | Not calculated |
| Pain | 4 | 1005 | 9.9 | 3.8 | 2.4 (1.4 to 4.1) | 16 (11 to 31) |
| Papules | 3 | 735 | 3.4 | 2.4 | 1.6 (0.59 to 4.2) | Not calculated |
| Pruritus | 3 | 735 | 14 | 9.4 | 1.6 (0.98 to 2.5) | Not calculated |
| Oedema | 3 | 735 | 8.0 | 6.1 | 1.3 (0.75 to 2.4) | Not calculated |
| CI: confidence interval; NNH: number needed to treat for an additional harmful outcome; RR: risk ratio | ||||||
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