title: Simpson's paradox and the analysis of operating room metrics.
authors.affiliation: University of Miami Hospital and Sylvester Comprehensive Cancer Center, Miami, FL., dsinclair@med.miami.edu.
authors.forename: David
authors.initials: D
authors.lastname: Sinclair
mesh_terms: D000556:Ambulatory Surgical Procedures; D015986:Confounding Factors, Epidemiologic; D017598:Efficiency, Organizational; D006760:Hospitalization; D006785:Hospitals, University / Q000458:organization & administration; D006801:Humans; D009873:Operating Rooms / Q000458:organization & administration*