Phedy Phedy1, Yoshi Pratama Djaja2, Singkat Dohar Apul Lumban Tobing3, Luthfi Gatam1, Didik Librianto1, Asrafi Rizki Gatam1, Nicko Perdana Hardiansyah4. 1. Department of Orthopaedic and Traumatology, Fatmawati Central General Hospital, Jl. Fatmawati No. 1, Jakarta Selatan, DKI Jakarta, Indonesia. 2. Department of Orthopaedic and Traumatology, Fatmawati Central General Hospital, Jl. Fatmawati No. 1, Jakarta Selatan, DKI Jakarta, Indonesia. yoshipratamadjaja@yahoo.com. 3. Department of Orthopedic, Rumah Sakit Cipto Mangunkusumo, Jakarta, Indonesia. 4. Department of Orthopaedic, Soelianti Saroso General Hospital, Jakarta, Indonesia.
Abstract
PURPOSE: The Oswestry Disability Index (ODI) is one of the most common patient-reported outcome measures used for low back pain (LBP). Since it was not available in Indonesian, this study aimed to perform a cross-cultural adaptation of ODI to Indonesian and evaluate its psychometric properties. METHODS: We performed a cross-cultural adaptation of ODI v2.1a into Indonesian language (ODI-ID) and determined its internal consistency, test-retest reliability, measurement error, confirmatory factor analysis, floor-ceiling effect, and construct validity by hypotheses testing of its correlation with Short Form-36 (SF-36) and visual analog scale (VAS). Adults (> 17 years of age) diagnosed with low back pain were included. RESULTS: A total of 96 subjects were included in this study. The original ODI questionnaire was translated into an Indonesian version and showed a good internal consistency (Cronbach's alpha = 0.90) and good reliability (intraclass correlation = 0.97). The standard error of measurement values of 3.35 resulted in a minimal detectable change score of 9. Nine out of nine (100%) a priori hypotheses were met, confirming the construct validity. A strong correlation was found with the physical component of SF-36 (0.77 and 0.76 for pain and physical function, respectively) and VAS (0.79). Confirmatory factor analysis resulted in a poor but significant fit to the original one-factor structure and the static-dynamic two-factor structure. Floor-ceiling effects were not found. CONCLUSIONS: The Indonesian version of ODI displayed similar reliability, validity, and psychometric characteristics to the original ODI. This questionnaire will be a suitable instrument for assessing LBP-related disability for Indonesian-speaking patients.
PURPOSE: The Oswestry Disability Index (ODI) is one of the most common patient-reported outcome measures used for low back pain (LBP). Since it was not available in Indonesian, this study aimed to perform a cross-cultural adaptation of ODI to Indonesian and evaluate its psychometric properties. METHODS: We performed a cross-cultural adaptation of ODI v2.1a into Indonesian language (ODI-ID) and determined its internal consistency, test-retest reliability, measurement error, confirmatory factor analysis, floor-ceiling effect, and construct validity by hypotheses testing of its correlation with Short Form-36 (SF-36) and visual analog scale (VAS). Adults (> 17 years of age) diagnosed with low back pain were included. RESULTS: A total of 96 subjects were included in this study. The original ODI questionnaire was translated into an Indonesian version and showed a good internal consistency (Cronbach's alpha = 0.90) and good reliability (intraclass correlation = 0.97). The standard error of measurement values of 3.35 resulted in a minimal detectable change score of 9. Nine out of nine (100%) a priori hypotheses were met, confirming the construct validity. A strong correlation was found with the physical component of SF-36 (0.77 and 0.76 for pain and physical function, respectively) and VAS (0.79). Confirmatory factor analysis resulted in a poor but significant fit to the original one-factor structure and the static-dynamic two-factor structure. Floor-ceiling effects were not found. CONCLUSIONS: The Indonesian version of ODI displayed similar reliability, validity, and psychometric characteristics to the original ODI. This questionnaire will be a suitable instrument for assessing LBP-related disability for Indonesian-speaking patients.
Entities:
Keywords:
Cross-cultural adaptation; Indonesian; Low back pain; Oswestry Disability Index
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