• Mary Byrne, Ann Troy, Laurence A Bradley, Peter J Marchisello, Kurt F Geisinger, Laurie H Van der Heide, and Edward J Prieto.
• Department of Psychology, Fordham University, Bronx, N.Y. 10458, USA Section on Medical Psychology, Bowman Gray School of Medicine, Winston-Salem, N.C. 27103, USA Hospital for Special Surgery, New York Hospital-Cornell Medical Center, New York, N.Y. 10021 U.S.A.
• Pain. 1982 Jun 1; 13 (2): 193-201.

AbstractLow back pain patients' responses to the McGill Pain Questionnaire (MPQ) were factor analyzed using the principal factor method and direct oblique rotation procedures. Four factors were extracted that accounted for 55% of the total variance. Coefficients of congruence were computed in order to relate the current factors with those extracted in a previous factor analytic investigation. The results provided positive evidence that the sensory pressure, evaluative, and affective-sensory factors that were previously identified are stable dimensions underlying the MPQ responses of low back pain patients. However, it is necessary to conduct further cross-validation studies using patients from a wide variety of treatment settings.

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