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Lung hyperpermeability and asthma prevalence in schoolchildren: unexpected associations with the attendance at indoor chlorinated swimming pools
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  • Published on:
    Asthma and swimming pools: statistical issues
    • Alfred M. Bernard, Professor and Research Director
    • Other Contributors:
      • Claire de Burbure

    Dear Editor

    Although we appreciate the interest of Dr Armtrong and Dr Strachan for our paper on the pool chlorine/asthma risk,[1] we cannot really take on board their reasoning concerning the statistical analyses. When questioning the strength of the associations found in our studies, they seem indeed to attribute much importance to the p values of the associations emerging between cumulated pool attendance and ind...

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    Conflict of Interest:
    None declared.
  • Published on:
    Asthma and swimming pools: statistical issues
    • Ben G Armstrong, Reader in Epidemiological Statistics
    • Other Contributors:
      • David Strachan.

    Dear Editor

    Bernard et al.[1] presented results from several studies investigating childhood asthma in relation to swimming pool use. Though the studies were generally well-conducted, there are some respects in which the statistical analysis and interpretation are misleading.

    The study of asthma prevalence in relation to swimming pool use was essentially an ecologic design - the unit of analysis was...

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    Conflict of Interest:
    None declared.
  • Published on:
    Asthma in young children

    Dear Editor

    Having suffered from Asthma all my life I am surprised that common hasards in the daily life of children are not addressed even in the 21st century. Chlorine in swimming baths was always a problem to me as a child, it was used far more concentrated than nowadays.

    Another very serious trigger was to be found in cardboard containers of fruit drinks though. I now realise that they contained Sodium...

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    Conflict of Interest:
    None declared.