title: Investigations using clinical data registries: observational studies and risk adjustment.
authors.affiliation: Department of Surgery, John Cochran Veterans Affairs Medical Center and the Department of Surgery, School of Medicine, Washington University in St. Louis, St. Louis, MO, USA.
authors.forename: Bruce L
authors.initials: BL
authors.lastname: Hall
authors.forename: Karl Y
authors.initials: KY
authors.lastname: Bilimoria
authors.forename: Clifford Y
authors.initials: CY
authors.lastname: Ko
mesh_terms: D016022:Case-Control Studies; D015331:Cohort Studies; D019348:Empiricism; D006801:Humans; D019370:Observation / Q000379:methods; D011897:Random Allocation; D016032:Randomized Controlled Trials as Topic / Q000592:standards; D012042:Registries; D012044:Regression Analysis; D015203:Reproducibility of Results; D012106:Research / Q000592:standards*; D020379:Risk Adjustment / Q000592:standards*; D012680:Sensitivity and Specificity