title: Statistics commentary series: commentary #4--relative risk and the number needed to treat.
authors.affiliation: From the Department of Psychiatry & Behavioural Neurosciences, McMaster University, Hamilton; and Department of Psychiatry, University of Toronto, Toronto, Ontario, Canada.
authors.forename: David L
authors.initials: DL
authors.lastname: Streiner
mesh_terms: D006801:Humans; D008960:Models, Psychological; D061366:Numbers Needed To Treat / Q000706:statistics & numerical data*; D012306:Risk