Authors' reply

BMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6986.1071 (Published 22 April 1995) Cite this as: BMJ 1995;310:1071
  1. Ruth Gilbert,
  2. Ruth Wigfield,
  3. Peter Fleming,
  4. Jem Berry,
  5. Peter Rudd
  1. Lecturer in epidemiology Department of Epidemiology and Biostatistics, Institute of Child Health, London WC1N 1EH
  2. Research fellow Consultant paediatrician Department of Child Health, St Michael's Hospital, Bristol BS2 8EG
  3. Professor of perinatal pathology Department of Paediatric Pathology, St Michael's Hospital
  4. Consultant paediatrician Bath Unit for Research into Paediatrics, Royal United Hospital, Bath BA1 3NG

    EDITOR,—D M Tappin has three criticisms of our article: that it is impossible to separate the effects of breast feeding and socioeconomic status, that the control babies were inappropriately chosen, and that the sample was an inadequate size.

    Tappin states correctly that socioeconomic status is associated with breast feeding, but it is not perfectly correlated. In Britain in 1990, 86% of women categorised as social class …

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