Effect of Hamstring Tightness, Back Pain and Disability on Sleep Quality

Background: Chronic low back pain (CLBP), defined as pain persisting for more than three months, is associated with disability, functional limitations, musculoskeletal issues, and sleep disturbances in many individuals worldwide. Objective: The main objective of this study was to determine the effect of hamstring tightness, pain intensity, and disability on sleep quality in patients with chronic low back pain. Methods: This cross-sectional study included 387 individuals aged 25-55 years, recruited from various orthopedic units. Data were collected using the Roland-Morris Questionnaire (RMQ) for disability, the Pittsburgh Sleep Quality Index (PSQI) for sleep quality, the Active Knee Extension (AKE) test for hamstring tightness, and the Numeric Pain Rating Scale (NPRS) for pain intensity. Statistical analysis was conducted using SPSS version 25. Descriptive statistics, including means and standard deviations, were calculated for quantitative variables, while frequencies and percentages were calculated for qualitative variables. Chi-square tests were performed to examine the associations between NPRS, RMQ, AKE scores, and PSQI scores, with a p-value of less than 0.05 considered statistically significant. Results: The mean age of the 387 participants was 41.67 ± 13.38 years; 233 were females (60.2%), and 154 were males (39.8%). The mean RMQ score was 11.45 ± 2.34, the mean PSQI score was 8.58 ± 2.60, and the mean NPRS score was 4.97 ± 1.37. The AKE test was positive in 34.6% of participants. Chi-square tests showed a significant positive association between NPRS and PSQI scores (p = 0.001), and between RMQ and PSQI scores (p = 0.048). However, the association between AKE scores and PSQI scores was not significant (p = 0.400). Conclusion: This study highlights the significant association between pain intensity, disability, and sleep quality in patients with chronic nonspecific low back pain. Pain and disability adversely affect sleep quality, while hamstring tightness does not appear to have a significant impact. These findings underscore the importance of addressing pain and disability to manage sleep disturbances in this patient population.