A study examined the feasibility of using the Comprehensive Nursing Achievement Test as a predictor of nursing students' eventual success on the National Council Licensure Examination (NCLEX-RN). The predictive validity of other factors, such as age, college entrance test scores, and grades in second-year nursing courses, was also examined. Seventy-one graduates of the 1986 registered nursing class from Long Beach City College (California) constituted the study sample. Data collected for each person in the sample included their NCLEX-RN score, their Comprehensive Nursing Achievement Test score, their age when they took the comprehensive test, their math and reading college admission scores, and their grade-point average (calculated on the basis of courses taken during the second year of the nursing program). A two-tailed independent T-test was used on the means for both tests. No significant difference between the two means was found. This confirmed the usefulness of the Comprehensive Nursing Achievement Test as a predictor of success on the NCLEX-RN. In addition to the Comprehensive Nursing Achievement Test score, the best indicator of success on the NCLEX-RN was the student's performance in second-year nursing courses. Age and math and reading admission scores did not predict success on the NCLEX-RN. It was therefore recommended that the practice of administering the Comprehensive Nursing Achievement Test be continued and that the test be used for curriculum review. (MN)