title: Relationship between MMPI-2 cluster profiles and surgical outcome in low-back pain patients.
abstract: The purpose of this study was to investigate back surgery outcome differences based on Minnesota Multiphasic Personality Inventory-2 (MMPI-2) profile types. Four homogenous subgroups were found from a hierarchical cluster analysis of 201 MMPI-2 profiles. These four clusters consisted of a Depressed-pathological profile, a conversion V profile (V-type), a neurotic Triad profile, and a within normal limit (WNL) profile. Patients in the WNL and Triad subgroups reported significantly more satisfaction with postsurgical improvement than did patients in the Depressed-pathological or V-type subgroups. The Triad subgroup also gave a more favorable subjective rating of surgical outcome than did patients in the Depressed-pathological or V-type subgroups. These groups also differed on measures of work status and nonwork-related physical activity levels but not on indices of pain.
authors.affiliation: Department of Clinical and Health Psychology, University of Florida, Gainesville 32610, USA.
authors.forename: J L
authors.initials: JL
authors.lastname: Riley
authors.forename: M E
authors.initials: ME
authors.lastname: Robinson
authors.forename: M E
authors.initials: ME
authors.lastname: Geisser
authors.forename: V T
authors.initials: VT
authors.lastname: Wittmer
authors.forename: A G
authors.initials: AG
authors.lastname: Smith
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D017116:Low Back Pain / Q000523:psychology / Q000601:surgery*; D008950:MMPI / Q000706:statistics & numerical data; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D016896:Treatment Outcome