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Background: Low Back Pain (LBP) is a major health and economic problem. The aim of this study is to compare pain, and disabling effects of chronic low back pain in NAJA-Vali Asr Hospital patients before and after a period of medical treatment. Materials and Methods: In this cross - sectional study of 167 patients with LBP attending NAJA Vali-e- Asr (A) Hospital, who were under treatment with NSAIDs for 6 weeks, based on physician’s diagnosis were selected availability and using Cochran formula. Severity and disability from LBP questionnaire of OSWESTRY collected from all patients before and after treatment. A mean change of less than 10% suggested as partial recovery, while the patients who reached more than 10% decrease suggested as significant recovery. Frequency, mean, Standard Deviation, t-test and chi-square test were performed using SPSS software. Results: The results indicated that there is a significant change in the mean score of pain-related disability before and after treatment (respectively 26.37 ± 7.89 and 34.76± 8.85, P =0.0001). Results also showed 32.3% of patients reached the recovery level of less than 10% after treatment, while 67.7% achieved 10% or more. Results showed a significant association between gender and the recovery rate (P =0.016) Conclusion: The findings showed that medications is effective in reducing disability from low back pain and Oswestry questionnaire also can be performed beside the medical diagnostic field to assess disability from back pain.

Keywords: Back pain, Disability from back pain, Remission, Oswestry questionnaire

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