title: How to work with a subgroup analysis.
authors.affiliation: Division of Orthopaedic Surgery, McMaster University, Hamilton, Ont.
authors.forename: Bernadette
authors.initials: B
authors.lastname: Dijkman
authors.forename: Bauke
authors.initials: B
authors.lastname: Kooistra
authors.forename: Mohit
authors.initials: M
authors.lastname: Bhandari
mesh_terms: D006801:Humans; D011364:Professional Practice; D016032:Randomized Controlled Trials as Topic / Q000379:methods*; D012107:Research Design