title: Expressing the magnitude of adverse effects in case-control studies: "the number of patients needed to be treated for one additional patient to be harmed".
authors.affiliation: Department of Epidemiology and Biostatistics, Faculty of Medicine, McGill University, Montreal, Canada H3A 1A2.
authors.forename: L M
authors.initials: LM
authors.lastname: Bjerre
authors.forename: J
authors.initials: J
authors.lastname: LeLorier
mesh_terms: D016022:Case-Control Studies; D006801:Humans; D007049:Iatrogenic Disease / Q000453:epidemiology; D016017:Odds Ratio; D016032:Randomized Controlled Trials as Topic; D018570:Risk Assessment; D018401:Sample Size