Letter

Paternal age and schizophrenia: Authors' reply

BMJ 2005; 330 doi: 10.1136/bmj.330.7483.148 (Published 13 January 2005)
Cite this as: BMJ 2005;330:148.1

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  1. Attila Sipos, honorary senior clinical lecturer in psychiatry (Attila.Sipos@bristol.ac.uk),
  2. Glynn Harrison, professor of mental health,
  3. Finn Rasmussen, senior clinical lecturer and associate professor of epidemiology
  1. Academic Unit of Psychiatry, University of Bristol, Bristol BS6 6JL
  2. Academic Unit of Psychiatry, University of Bristol, Bristol BS6 6JL
  3. Department of Public Health Sciences, Karolinska Institute, Norrbacka, SE-17176 Stockholm, Sweden

    EDITOR—Procopio highlights the fact that our study included only subjects with a younger age of onset ranging from 16 to 28 and suggests that our finding of an association between paternal age and schizophrenia therefore needs to be interpreted cautiously.

    This association has already been replicated in a number of studies covering much wider ranges of age of onset: the Jerusalem cohort covered …

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