Normal Personality Correlates of Chronic Pain Subgroups

A heterogeneous sample of chronic pain patients was first classified into one of three previously identified subgroups (i.e., dysfunctional, interpersonally distressed, adaptive) using the Multidimensional Pain Inventory (R. D. Kerns, D. C. Turk, & T. E. Rudy, 1985). Multiple differences at the domain and facet levels of the Revised NEO PI-R Personality Inventory (P. T. Costa, Jr. & R. R. McCrae, 1992) were found among the three subgroups of patients. In particular, the interpersonally distressed patients showed a greater degree of Neuroticism and were more introverted. Further analyses revealed that this group had tendencies toward feeling more vulnerable, being less trustful, and experiencing less positive emotions than the other groups. The dysfunctional group of patients was notable in terms of their low activity level and lower Openness (to new experience). Adaptive copers reported being emotionally stable, having a moderate degree of Extraversion, and being open to a wider variety of experiences. These differences may act as mediating influences in differing patient responsiveness to pain management programs.