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BMJ 1995; 311 doi: https://doi.org/10.1136/bmj.311.7011.1022d (Published 14 October 1995) Cite this as: BMJ 1995;311:1022
  1. Jens Georg Hansen
  1. General practitioner General Practice, Lindenborgvej 93, DK-9200 Aalborg SV, Denmark

    EDITOR,--Frank Dobbs states that our results might have been different if we had used stepwise logistic regression; we used this as well as the method reported in our paper, but there were no significant changes in our conclusion.

    The purpose of van Duijn et al's study was to establish the incidence of both maxillary and frontal sinusitis in general practice as diagnosed by …

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