Study confounded by lack of correction for social class

doi:10.1136/bmj.311.7013.1167a

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Steinar Westin, Professor

Department of Community Medicine and General Practice, University of Trondheim, Medical University Centre, N-7005 Trondheim, Norway

EDITOR,--Morten Gronbaek and colleagues' paper on the possible health benefits of drinking wine1 attracted wide attention in the media in Norway. It might be wise to obey the slogan “never check a good story.” However, the reporting of associations between risk factors and health outcomes in the …