Characteristics of chronic pain patients: factor analysis of the MMPI-2.

The Minnesota Multiphasic Personality Inventory (MMPI) has been used extensively in the assessment of chronic pain patients. More recent studies using cluster-analytic techniques, investigation of sub-scales, and factor analysis have refined its usefulness. The present study factor-analyzed MMPI-2 data from a sample of 114 chronic pain patients from two different treatment programs.

Comprehensive multidisciplinary treatment of chronic pain: a follow-up study of treated and non-treated groups.

There are relatively few outcome studies of multidisciplinary chronic pain programs which have utilized no-treatment comparison groups. The present study compared a group of chronic pain patients (N = 42) treated in a comprehensive multidisciplinary pain program with a group of patients (N = 15) who were evaluated but not treated. Comparisons were made at evaluation and at a follow-up period averaging 11 months later.