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Head Injuries. Am I right, or have I suffered a few too many
While reading through The Effectiveness of Bicycle Helmets:A Review[1] in
section 2.3 paragraph 3, it quotes a study by Piggott et al, 1994[2] as saying that "The prevalence of head injuries among hospital admissions was 32 per cent .... although for only 5 per cent was the head injury categorised as being more than minor" Sorry, what was that again? "for only 5 per cent was the head injury categorised as being more than minor" So unless my brain is failing me again[3], and if this study is right and the results are comparable across all hospitals: 1. 95% of the head injuries in hospital admissions in this study are minor. 2. With plenty of exceptions, it is a broad rule that the harder the impact, the more the damage. 3. Helmets protect better against impacts of a smaller force than of a larger force. 4. So if x% of head injuries are prevented by wearing a helmet, then that will generally be the least serious x% 5. So to start preventing significant amounts of serious head injuries cycle helmets would have to reduce head injuries by more than 95% - and that's just the ones serious enough to make people pop into the hospital! I have two questions. A) Is there a flaw in my logic? B) Is the 5% figure valid for UK hospitals? [1] Revised Edition Prepared by Dr. Michael Henderson for the Motor Accidents Authority of New South Wales, Australia. 1995 http://www.helmets.org/henderso.htm [2] Piggott P, Knuiman M W and Rosman D L, Rates and pattern of injuries from bicycle crashes based on population: police and hospital data, Rood and Transport Research, 3:64-74, 1994. [3] Postage and packaging free... |
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