title: Combining randomized and nonrandomized patients in the statistical analysis of clinical trials.
authors.affiliation: Institut für Medizinische Biometrie und Informatik, Universität Freiburg, FRG.
authors.forename: M
authors.initials: M
authors.lastname: Schumacher
authors.forename: K
authors.initials: K
authors.lastname: Davis
mesh_terms: D002986:Clinical Trials as Topic / Q000706:statistics & numerical data*; D015331:Cohort Studies; D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000401:mortality / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D011183:Postoperative Complications / Q000401:mortality; D011897:Random Allocation; D012107:Research Design