Variables that correlate with scores on the National Certifying Examination (NCE) for Physician's Assistants (PAs) were investigated. It is noted that NCE scores represent professional entry-level performance for PAs and that identification of variables related to PA performance may promote the development of standardized selection criteria. The following variables were assessed: science grade point average, nonscience grade point average, overall grade point average, Scholastic Aptitude Test-Math, and Scholastic Aptitude Test-Verbal. NCE scores that were assessed were as follows: multiple choice questions, patient management problems--data gathering, patient management problems--management and therapy, clinical skills problems, and composite. The study sample consisted of 59 graduates of the Physician's Assistant Program of the Medical College of Georgia. No significant correlations were found between the independent variables and the NCE scores. An extensive review of studies concerning the prediction of success of applicants to allied health education programs as well as medical school and professional programs is included. (SW)