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Childhood obstructive sleep apnoea: Author's reply

BMJ 2005; 331 doi: https://doi.org/10.1136/bmj.331.7513.406 (Published 11 August 2005) Cite this as: BMJ 2005;331:406
  1. Suresh Kotagal, consultant in child neurology and paediatric sleep disorders
  1. Mayo Clinic, Rochester, MN 55905, USA

    EDITOR—Reimer says that covariance does not prove causation. I would remind him of the longitudinal, case-control study of Gozal, in which elementary school children with obstructive sleep apnoea who had adenotonsillectomies showed significantly improved academic performance …

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