title: Excess mortality can be explained by case mix selection.
authors.forename: Steffen J
authors.initials: SJ
authors.lastname: Breusch
authors.forename: Colin R
authors.initials: CR
authors.lastname: Howie
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D015207:Osteoarthritis, Hip / Q000401:mortality* / Q000601:surgery*