167 e-Letters

published between 2014 and 2017

  • Belt up...Speed up?
    Tony H. Reinhardt-Rutland

    The story of seatbelts has ever been one of success - at least for government bodies and the motor industry. However, seatbelts have an unfortunate side effect owing to the dissipation of the kinetic and vestibular discomfort associated with acceleration and deceleration: in effect, faster and more erratic driving is encouraged.

    Moreover, any savings in casualties among motor vehicle occupants must be weighed...

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  • Every driver needs metabolic testing and the information needs to be stored in a "black box"
    Richard G Fiddian-Green
    Dear Editor

    I read the article by Shults et al with interest.[1] State driving under the influence of alcohol (DUI) countermeasures [2] is a rational measure but one that has serious limitations including the confounding influence of recreational drugs, carbon monoxide, other environmental toxins, medications and cerebrovascular diseases. The immediate opportunity exists for implementing a far more rational an...

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  • Another serious error in Cook & Sheikh's analysis
    John Franklin

    Dear Editor

    There is another serious problem with Cook and Sheikh's paper.[1] The authors cite a TRL report [2] stating that, on major roads, helmet wearing (%HW) increased from 16.0%, in 1994, to 17.6% in 1996 then 21.8% in 1999. The TRL report continues: "this was due to an increase among adult cyclists wearing helmets: there was no change amongst child cyclists."[2]

    In fact, Table 3 shows %HW o...

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  • Cycle helmet law not properly assessed
    Colin F Clarke

    Reading the article, The effects of provincial bicycle helmet legislation on helmet use and bicycle ridership in Canada (ref 1), it appears the conclusions reached were ill considered and unreliable for a number of reasons.

    The article concludes that helmet legislation is not associated with changes in ridership. This statement is somewhat misleading. Fig 3 in the article shows trends of recreational bicycle u...

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  • Re:Zero Blood Alcohol Concentration (BAC) Limit for drivers under 21
    Solitay Taiwo

    How easy is it to enforce zero limit in the face of possiblity of physicigical sources of alcohol and uses of other dietry and household sources of alcohol? There might be a lot or few false positive cases as a result. Is there anything of in the scientific evidence base?

    Conflict of Interest:

    None declared

  • Authors' second reply
    Adrian D Cook

    Dear Editor

    Franklin and Robinson are correct to question the complexity of the evidence on helmet wearing among children.[1] As a brief report our paper was unable to explore this in detail but we are grateful for the opportunity to do so here. The helmet wearing surveys suggested that helmet wearing fell among children between 1994 and 1996.[2] Analysing accident data for the years 1995/96 alone shows a corresp...

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  • Re:Re:Zero Blood Alcohol Concentration (BAC) Limit for drivers under 21
    Robert M> Solomon

    The major problem in enforcing the zero BAC limit is ensuring that the province or territory enacts accompanying legislation authorizing the police to demand a breath sample from drivers subject to this limit. There has been no problem with drivers testing positive with exceedingly small amounts of alcohol in their breath samples, because of natural processes or diet. Presumably, the machines have thresholds to eliminate...

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  • Re: Authors' reply
    Tony Raven

    Dear Editor

    Cook and Sheikh have accepted the fundamental error in their paper pointed out by Annan.[1-3]

    When the arithmetic error is corrected there are only two conclusions that can be reached. One, pointed out by Annan,[2] is that for every helmet worn, two people are saved. This is clearly untenable and so the only other conclusion, also pointed out by Annan,[2] is that there are other factors invo...

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  • Sports safety research is not without its challenges
    Caroline F Finch

    Dear Editor

    Whilst I agree with Nordstrom[1] about the clear research opportunities in relation to headgear effectiveness for soccer players, I would like to make a few comments.

    Firstly, the issues raised are not just restricted to headgear use in soccer – they apply equally well to many other sports, particularly other football codes – and nor do they only apply to headgear use. Much of sports safet...

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    Tony H. Reinhardt-Rutland

    Lusk et al's paper (1) indicates an important subtext regarding travel. Governments wish to make personal mobility as widely available as possible; this inevitably entails promotion of the private automobile, which can provide convenient and comfortable travel for the widest range of individuals, including those for whom disability would otherwise pose severe limitations in participating in society. However, there is a...

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