Table 3. Comparison of Patient Characteristics (Odds Ratio for Group I^*:Group II^†Patients)^‡

* Cases involving mid-career, non–board-certified anesthesiologist.

† Cases involving all other anesthesiologists.

‡ Odds ratio denotes the odds of a covariate of interest observed in group I patients to that of group II patients.

DRG = diagnosis-related group; COPD = chronic obstructive pulmonary disease.