Background: The study was planned to determine the relationship of the Functional Rating Index (FRI) with
disability, pain, and quality of life in patients with low back pain.
Material/Methods: A total of 84 patients with low back pain, of whom 58 were women and 26 were men, with average age of 47.8±12.0 years participated in this study. The Functional Rating Index was used to determine the functional status of the patients. Disability was evaluated using the Roland-Morris Disability Questionnaire (RMQ), pain intensity was evaluated with the Visual Analog Scale (VAS), and the
Short Form-36 (SF-36) was used to assess quality of life. The Pearson correlation coeffi cient was
used for correlation of the FRI with the RMQ, VAS, and SF-36. The internal consistency for testretest
reproducibility of FRI was assessed with Cronbach’s a.
Results: There was a strong positive correlation between the FRI and the RMQ (p

Keywords: Disability Evaluation, Low Back Pain - physiopathology, Pain Measurement, Quality of Life, Questionnaires, Reproducibility of Results, Statistics as Topic