The results of a prospective controlled study designed to evaluate the performance of a computerized diagnostic aid in the clinical setting are reported herein. Two hundred and fifty patients referred to an outpatient clinic for gastrointestinal complaints were entered into the study. The diagnostic aid program was used routinely and the findings elicited from patients' medical histories and physical examinations were entered into the computer at the time of initial evaluation. The accuracy of the program's diagnoses was measured and compared with the accuracy of diagnoses made by a control group of physicians. The overall diagnostic accuracy of the program was found to be 69.2% (P much less than .0000001), a value significantly greater (P = .0005) than the overall accuracy of the control group of physicians, which was found to be 52%. A high agreement rate between program and physicians was also observed. These preliminary results seem to indicate a practical use for the program as a support in the initial screening of patients presenting with gastrointestinal complaints.
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