Assessing the Functional Status of Patients with Chronic Pain—Cross Cultural Adaptation and Psychometric Properties of the Serbian Version of the Pain Disability Questionnaire

Aleksandar Knežević, Petar Čolović, Milica Jeremić-Knežević, Čila Demeši-Drljan, Dušica Simić-Panić and Randy Neblett
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Aleksandar Knežević: Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
Petar Čolović: Department of Psychology, Faculty of Philosophy, University of Novi Sad, 21000 Novi Sad, Serbia
Milica Jeremić-Knežević: Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
Čila Demeši-Drljan: Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
Dušica Simić-Panić: Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
Randy Neblett: PRIDE Research Foundation, Dallas, TX 75235, USA

IJERPH, 2021, vol. 18, issue 13, 1-13

Abstract: The Pain Disability Questionnaire (PDQ) has established itself as a leading patient-reported outcome measure for assessing both mental and physical components of pain-related disability. The current study aimed to translate the PDQ into Serbian and validate its psychometric properties. Following a standard translation process, a total of 554 chronic pain patients (average age 55.37 ± 12.72 years; 375 (67.5%) females) completed the PDQ-Serb, Oswestry Disability Index (ODI), Short Form-36 (SF-36), pain intensity rating and a six-minute walk test (6MWT). Responsiveness was examined in a subsample of 141 patients who completed an inpatient rehabilitation program. The internal consistency of the PDQ-Serb was excellent (Cronbach ? = 0.92) and test-retest reliability was favorable (ICC = 0.87). Factor analyses found a bifactor model to be the best fit (CFI = 0.97: TLI = 0.96: RMSEA = 0.05; SRMR = 0.03). Statistically significant Pearson’s coefficient correlations ( p < 0.001) were found between the PDQ-Serb and ODI (r = 0.786), SF-36 Physical Components summary (r = ?0.659), SF-36 Mental Components summary (r = ?0.493), pain intensity rating (r = 0.572), and 6MWT (r = ?0.571). Significant post-treatment improvements following inpatient rehabilitation were found with the PDQ-Serb ( p < 0.001; effect size 0.431) and other clinical variables ( p < 0.001; effect sizes from 0.367 to 0.536). The PDQ-Serb was shown to be a reliable and valid self-report instrument for the evaluation of pain-related disability.

Keywords: chronic pain; disability; disability evaluation; quality of life; psychosocial distress; function; physical functional performance; Pain Disability Questionnaire (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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