Letter

Ozone and childhood wheezy episodes

BMJ 1996; 312 doi: 10.1136/bmj.312.7046.1607 (Published 22 June 1996)
Cite this as: BMJ 1996;312:1607.1

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Needs testing as an a priori hypothesis

  1. Meirion R Evans,
  2. Gillian Richardson,
  3. Layla N Al-Jader,
  4. Michael L Burr
  1. Consultant in public health medicine Registrar in public health medicine Senior registrar in public health medicine Directorate of Public Health, Bro Taf Health Authority, Cardiff CF4 3QX
  2. Senior lecturer in public health medicine Centre for Applied Public Health Medicine, University of Wales College of Medicine, Cardiff CF1 3NW

    EDITOR,—Roger Buchdahl and colleagues conclude from their analysis of associations between air pollution and the incidence of acute childhood wheezy episodes that a critical ozone concentration exists, above or below which children are more likely to develop symptoms.1 …

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