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Intel-correlation and Test-Retest Reliability of the Pain Disability Index (PDI) and the Oswestry Disability Questionnaire (ODQ) and Their Correlation with Pain Intensity in Low Back Pain Patients
Ist Teil von
The Clinical journal of pain, 1993-09, Vol.9 (3), p.189-195
Ort / Verlag
Lippincott-Raven Publishers
Erscheinungsjahr
1993
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
ObjectiveTo determine the intercorrelation between subjective disability, as assessed with the Pain Disability Index (PDI) and the Oswestry Disability Questionnaire (ODQ) and their correlation with visual analogue scale (VAS) pain intensity ratings.Design and SubjectsQuestionnaires were administered to 94 patients with chronic low back pain with or without radiation into the legs of at least 3 monthsʼ duration.SettingTertiary care center.ResultsHigh correlations were noted between the ODQ and PDI (r = 0.83) and PDI factor 1 (r = 0.84), a subscale of the PDI. Lower correlations were noted between pain intensity (VAS) scores and the ODQ (r = 0.62) and the PDI (r = 0.69). A weaker correlation (r = 0.41) was noted between the ODQ and PDI factor 2. Intraclass correlation coefficients (ICC) for test-retest reliability in 20 patients (time interval 1 week) were for the ODQ ICC = 0.83, PDI ICC = 0.91, PDI percentage score ICC = 0.91, PDI factor 1 ICC = 0.87, and PDI factor 2 ICC = 0.73, respectively.ConclusionsThe present results suggest that either the PDI or the percentage score PDI and also the even shorter-to-administer PDI factor 1 may be useful and reliable tests for the assessment of subjective disability in low back pain patients. As noted by the moderate intercorrelations with pain intensity scores, both the PDI and the ODQ address a broader concept of disability than that directly related to pain intensity.