title: Relative risk is a relevant measure of association of left-handedness with inflammatory bowel disease.
abstract: A study of inflammatory bowel diseases and left-handedness was published in this Journal by Searlman and Fugagli (1987). We reanalysed the data and found that left-handedness was associated with relative risk of 2.5 for Crohn's disease and 2.9 for ulcerative colitis.
authors.affiliation: Department of Epidemiology, National Institute of Environmental Medicine, Stockholm, Sweden.
authors.forename: P G
authors.initials: PG
authors.lastname: Persson
authors.forename: A
authors.initials: A
authors.lastname: Ahlbom
mesh_terms: D001327:Autoimmune Diseases / Q000209:etiology; D003093:Colitis, Ulcerative / Q000209:etiology*; D003424:Crohn Disease / Q000209:etiology*; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D012307:Risk Factors