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Evid Based Nurs 4:41 doi:10.1136/ebn.4.2.41
  • Treatment

Routine primary immunisation using a longer needle resulted in fewer local reactions in infants

Longer v shorter needle for giving routine immunisations to infants*

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 days 9% 39% 76% (43 to 90) 4 (3 to 8)
At 3 days 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 days 19% 51% 63% (34 to 80) 4 (3 to 7)
At 3 days 13% 40% 67% (33 to 85) 4 (3 to 10)

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