Predicting acute maxillary sinusitis

doi:10.1136/bmj.311.7011.1022b

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Frank Dobbs

Regional research adviser in general practice Castletown Practice, Drumcliffe, County Sligo, Republic of Ireland

Trial may have lacked power

EDITOR,--Jens Georg Hansen and colleagues report a significant association of the C reactive protein concentration and erythrocyte sedimentation rate with acute maxillary sinusitis.1 Their conclusion that the symptoms and signs included in their logistic regression were not associated, however, is not warranted from their analysis. They do not report results of stepwise …