title: Defining efficiency requires more fidelity.
authors.forename: D
authors.initials: D
authors.lastname: Sanders
authors.forename: M
authors.initials: M
authors.lastname: Grayling
authors.forename: H
authors.initials: H
authors.lastname: Lillie
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D017598:Efficiency, Organizational / Q000592:standards*; D004739:England; D006801:Humans; D009873:Operating Rooms / Q000458:organization & administration*; D011785:Quality Assurance, Health Care / Q000379:methods*; D013503:Surgery Department, Hospital / Q000458:organization & administration