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KMID : 1189320160100040719
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Asian Spine Journal
2016 Volume.10 No. 4 p.719 ~ p.727
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An Outcome Measure of Functionality and Pain in Patients with Low Back Disorder: A Validation Study of the Iranian version of Low Back Outcome Score
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Azimi Parisa
Aghaei Hossein Nayeb
Azhari Shirzad
Shazadi Sohrab
Kashany Hamid Khayat
Mohammadi Hassan Reza
Montazeri Ali
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Abstract
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Study Design: Cross-sectional study.
Purpose: This study aimed to cross-culturally translate and validate the low back outcome score (LBOS) in Iran.
Overview of Literature: Lumbar disc hernia (LDH) is the most common diagnoses of low back pain and imposes a heavy burden on both individual and society. Instruments measuring patient reported outcomes should satisfy cetain psychometric properties.
Methods: The translation and cross-cultural adaptation of the original questionnaire was performed using Beaton's guideline. A total of 163 patients with LDH were asked to respond to the questionnaire at three points in time: preoperative and twice within 1-week interval after surgery assessments. The Oswestry disabilty index (ODI) was also completed. The internal consistency, test-retest, convergent validity, and responsiveness to change were assessed. Responsiveness to change also was assessed comparing patients' pre- and postoperative scores.
Results: The mean age of the cohort was 49.8 years (standard deviation=10.1). The Cronbach's alpha coefficients for the LBOS at preoperative and postoperative assessments ranged from 0.77 to 0.79, indicating good internal consistency. Test-retest reliability as performed by intraclass correlation coefficient was found to be 0.82 (0.62?0.91). The instrument discriminated well between sub-groups of patients who differed in the Finneson-Cooper score. The ODI correlated strongly with the LBOS score, lending support to its good convergent validity (r=??0.83; p<0.001). Further analysis also indicated that the questionnaire was responsive to change (p<0.001).
Conclusions: The Iranian version of LBOS performed well and the findings suggest that it is a valid measure of back pain treatment evaluation among LDH patients.
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KEYWORD
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Iran, Low back outcome score, Validity, Low back pain
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