Nurse anesthetists' evaluations of anesthesiologists' operating room performance are sensitive to anesthesiologists' years of postgraduate practice.

Study Objective: The first aim of this study was to test whether a 7 item evaluation scale developed by our department's certified registered nurse anesthetists (CRNAs) was psychometrically reliable. The second aim was to test whether anesthesiologists' performance changed with their years of postgraduate experience.

Design, Setting, Measurements: Sixty-two University of Iowa CRNAs evaluated 81 anesthesiologists during one weekend.