The use of the MMPI in a chronic back pain rehabilitation program

Assessed the usefulness of the MMPI in predicting treatment outcome for chronic low back pain patients. One hundred and thirty-two chronic low back pain patients who participated in a 6-week rehabilitation program were differentiated according to "successful" outcome. Outcome was defined in three major ways: Vocational restoration, significantly improved physical mobility, and patients' subjective evaluations of improved functional level. Pretreatment MMPIs of all outcome groups were compared. Data were analyzed by examining individual scale scores and code-types and by applying multiple regression analyses to the data. Results demonstrate that the MMPI can predict successful outcome. However, the strength of the relationship varies according to the outcome measure employed and the type of analysis completed on the data. It is concluded that, though an interesting research tool, at this time the MMPI is not a consistently valid clinical tool with the chronic back pain population in terms of predicting response to rehabilitation.