Özet:

Purpose: The purpose of this study was to investigate the Turkish adaptation, validity and reliability of the Functional Back Pain Scale (FBAS) in patients with back pain. Methods: One-hundred and twenty subjects were included in the study, who were able to read and write Turkish, who were diagnosed as non-specific back pain and were between 18 and 79 years of age. FBAS, Visual Analog Scale (VAS), Roland Morris Disability Questionnaire (RMDA), Oswestry Disability Index (OOI) and SF-36 Quality of Life Questionnaire (SF-36) were performed to all patients. Test retest reliability and internal consistency analyzes were conducted for reliability. The construct validity was examined by exploratory and confirmatory factor analysis while the criterion validity of FBAS was examined by correlation analysis between RMDA, OOI and SF-36 sub-group of physical function. Results: Test-retest correlation coefficient was r=0.87; p<0.01, Cronbach’s alpha 0.899, and total item correlation coefficients were between 0.484 and 0.710. In explanatory factor analysis, the scale was found to be a one-factor structure and explained 48.172% of the variance. The one-factor model of the scale was confirmed by confirmatory factor analysis. FBAS showed moderate correlation with RMDA (r=-0.693, p<0.001), OÖI (r=-0.794, p<0.001) and physical function subgroup of SF-36 (r=0.607, p<0.001). Conclusion: The Turkish version of FBAS is a valid and reliable measurement tool that can be used tomeasure loss of function in patients with back pain. 

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