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Authors defend methods used in their paper

BMJ 1999; 318 doi: (Published 13 March 1999) Cite this as: BMJ 1999;318:737
  1. Bertil Jacobson, Professor emeritus (,
  2. Marc Bygdeman, Professor
  1. Department of Medical Engineering, F60 Novum, Huddinge University Hospital, SE-141 86 Huddinge, Sweden
  2. Department of Obstetrics and Gynaecology, Karolinska Hospital, SE-171 76 Stockholm, Sweden

    EDITOR—In his editorial1 Appleby discusses our paper on obstetric care and the proneness of infants in traumatic births to suicide as adults.2 He gives the incorrect impression that we did not consider the potential confounding effect of year of birth and fetal hypoxia (asphyxia). We did so by including these variables in the multivariate …

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