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• W2098889073 abstract "Abstract Background and Purpose. Quebec Task Force Classification (QTFC) and pain pattern classification (PPC) procedures, including centralization and noncentralization, are common classification procedures. Classification was done to estimate validity of data obtained with QTFC and PPC procedures for differentiating patient subgroups at intake and for use in predicting rehabilitation outcomes at discharge and work status at 1 year after discharge from rehabilitation. Subjects. Patients (n=171, 54% male; mean age=37 years, SD=10, range=18–62) with acute work-related low back pain referred for physical therapy were analyzed. Methods. Patients completed pain and psychosocial questionnaires at initial examination and discharge and pain diagrams throughout intervention. Physical therapists classified patients using QTFC and PPC data at intake. Patients were classified again at discharge by PPC (time-dependent PPC). Results. Analysis of variance of showed QTFC and PPC data could be used to differentiate patients by pain intensity or disability at intake. Analysis of covariance showed that intake PPC predicted pain intensity and disability at discharge, but QTFC did not. Logistic regression showed that PPC predicted work status at 1 year, but QTFC did not. Classifying patients over time using time-dependent PPC data reduced the false positive rate by 31% and increased percentage of change in pretest-posttest probability of return to work by 16% compared with classifying patients at intake. Discussion and Conclusion. Results support the discriminant validity of the QTFC data at intake and predictive validity of the PPC data at intake. Tracking PPC over time increases predictive validity for 1-year work status." @default.
• W2098889073 created "2016-06-24" @default.
• W2098889073 creator A5063473002 @default.
• W2098889073 creator A5081916462 @default.
• W2098889073 date "2004-03-01" @default.
• W2098889073 modified "2023-10-18" @default.
• W2098889073 title "Categorizing Patients With Occupational Low Back Pain by Use of the Quebec Task Force Classification System Versus Pain Pattern Classification Procedures: Discriminant and Predictive Validity" @default.
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• W2098889073 doi "https://doi.org/10.1093/ptj/84.3.243" @default.
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