Objective: This study investigates whether two patient population groups, under resident or attending treatment, are equivalent or different in the distribution of patient characteristics, diagnoses, or pharmacotherapy. Methods: Demographic data, psychiatric diagnoses, and pharmacotherapy data were collected for 100 random patient charts of psychiatric residents, and were then compared with 100 random patient charts of attending psychiatrists. Results: Student's t test and chi square analysis suggested no statistically significant differences in the average number of comorbid Axis I diagnoses, percentages of patients with Axis II diagnoses, or major differences in the specific percentages of the 10 most common Axis I diagnoses. Furthermore, there were no statistically significant differences in the average number of psychiatric medications prescribed for pharmacological management of mental illness, or ratios of specific drug classes utilized. Conclusion: There seems to be no major differences in patient characteristics or in the treatment techniques that were utilized.