Background: The quality of life in patients with chronic low-back pain is lower in comparison with that in general population. This seriously affects the functional ability and working status of young and adult population. The aim of this study was to determine the level of disability and the health-related quality of life in patients with chronic non-specific low back pain. Methods: We performed a cross-sectional study in 187 patients (45.5 % of men, mean age 50.1 years) with chronic non-specific low back pain attending physical therapy program. We used Visual Analog Pain Scale (VAS), Euroqol questionnaire (EQq), and Oswestry Disability Index (ODI). Results: Mean ODI score SD was 14.6 9.0. Mean score of EQ-5D was 3.6 1.6 points and of E...