Study quoted had flawed design

BMJ 1995; 310 doi: https://doi.org/10.1136/bmj.310.6987.1138b (Published 29 April 1995) Cite this as: BMJ 1995;310:1138
  1. N R Dunn,
  2. M Campbell
  1. General practitioner Poole, Dorset BH18 8BQ
  2. Reader in medical statistics Department of Medical Statistics, Southampton General Hospital, Southampton SO9 4XY

    EDITOR,—In their meta-analysis of the efficacy of quinine for night cramps Malcolm Man-Son-Hing and George Wells analysed six trials that met strict criteria for design.1 Included in these six trials is one carried out by one of us (NRD) in 1991 …

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