Letters Prevalence of autism

The proportion of true cases of autism is not changing

BMJ 2014; 348 doi: https://doi.org/10.1136/bmj.g3774 (Published 11 June 2014) Cite this as: BMJ 2014;348:g3774
  1. Traolach S Brugha, professor of psychiatry1,
  2. Sally McManus, research director2,
  3. John Bankart, senior lecturer in biostatistics3,
  4. Rachel Jenkins, professor4,
  5. Jane Smith, research consultant5,
  6. Fiona Scott, consultant clinical psychologist6
  1. 1Department of Health Sciences, University of Leicester, Leicester General Hospital, Leicester LE5 4PW, UK
  2. 2NatCen, London, UK
  3. 3Keele University, UK
  4. 4Institute of Psychiatry, London, UK
  5. 5Leicester, UK
  6. 6Cambridge, UK
  1. tsb{at}le.ac.uk

Blenner and Augustyn state that the Centers for Disease Control and Prevention (CDC) study design cannot answer the question of whether autism spectrum disorder is increasing.1 We agree, but we do not agree with the implication that such evidence does …

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