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Table 6 ICD-10 coded head injuries and helmet use and relative risk of injury

From: Crash characteristics and patterns of injury among hospitalized motorised two-wheeled vehicle users in urban India

ICD-10 Head Injury* Helmet worn (n = 74) Helmet not worn (n = 304) Not worn relative risk (RR) of injury to worn
  N (%) N (%) RR 95% confidence interval
Superficial 22 (29.7%) 106 (34.9%) 1.17 0.80–1.72
Open wound 16 (20.3%) 118 (38.8%) 1.91 1.19–3.07
Fracture 6 (6.8%) 33 (10.5%) 1.56 0.63–3.86
Intracranial 2 (2.7%) 41 (13.5%) 4.99 1.23–20.1
Crush 1 (1.4%) 6 (2.0%) 1.46 0.17–11.9
Traumatic amputation 0 (0%) 2 (0.7%) - -
Other unspecified 5 (6.8%) 31 (10.2%) 1.51 0.61–3.74
  1. *ICD: International statistical classification of diseases and related health problems Version 10