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Percent change in Roland Morris Disability Questionnaire Pain Scale from day 1 to day 28. Ibu n = 43, AAB n = 41, and combination n = 38. Roland Morris Disability Index fell 63.1% between baseline and day 28 in the combination therapy group, and fell 50.3% in the AAB-alone group, while there was no significant effect on chronic back pain in the ibuprofen-alone treatment group.
