Longer v shorter needle for giving routine immunizations to infantsâ€
| Outcomes | Longer needle | Shorter needle | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| †Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| Any local reaction up to 3 days | 62% | 84% | 26% (7 to 43) | 5 (3 to 19) |
| Redness at 6 hours | 40% | 60% | 34% (3 to 56) | 5 (3 to 81) |
| At 1 day | 28% | 63% | 55% (30 to 73) | 3 (2 to 7) |
| At 2 day | 9% | 39% | 76% (43 to 90) | 4 (3 to 8) |
| At 3 day | 4% | 28% | 87% (51 to 96) | 5 (3 to 9) |
| Swelling at 6 hours | 23% | 58% | 61% (35 to 78) | 3 (2 to 6) |
| At 1 day | 28% | 63% | 55% (30 to 73) | 3 (2 to 7) |
| At 2 day | 19% | 51% | 63% (34 to 80) | 4 (3 to 7) |
| At 3 day | 13% | 40% | 67% (33 to 85) | 4 (3 to 10) |