• J L Louks, C W Freeman, and D A Calsyn.
• J Pers Assess. 1978 Apr 1; 42 (2): 152-7.

AbstractThe MMPI profiles of 74 low back pain patients who had previously been classified as "functional,""organic," or "mixed" were sorted into six profile groups. The six profile groups were those used by Pichot, Perse, Lekous, Dureau, Perez, and Rychewaert (1972); denial, "conversion V" without defensiveness, "conversion V" with defensiveness, depressed/anxious, psychotic and normal. Results indicate that all six profile types are well represented in the low back pain group. Evidence is also presented which shows that each of the pathological MMPI profile types examined across "functional," "organic," and "mixed" classification is significantly more elevated than a normal profile group on two scales (Lb, DOR) designed to measure functional aspects of pain. Pathological MMPI profile groups did not differ significantly from each other on the "functional" pain scales. The data presented in this study point to the relationship of various forms of psychopathology with "functional pain." The findings of this study would not support a homogeneous "pain personality" for low back pain patients. However, combined "conversion V" profiles accounted for 58% of the "functional" group, 45% of the "mixed" group and 35% of the "organic" group.

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