Objective: To evaluate the potential factors affect quality of life and sleep quality in patients presented with low back pain in Phramongkutklao hospital.

Methods: A cross-sectional study enrolled patients who were diagnosed with low back pain.

Demographic characteristics, history and character of pain, medications were reviewed. Excessive daytime sleepiness (using Epworth Sleeping Scale [ESS]), and health-related quality of life (36-item Short Form Health Survey [SF-36]) questionnaires were completed.

Results: Among 103 patients, 36 (35%) were men and 67 (65%) were women. Mean age was 61.7 ± 14.5 years (range 19-87). The most common co-morbid health condition was hypertension in 48 patients (46.6%). The mean duration of back pain was 39.5 months, ranged 0.25-600 months. Most patients had back pain with radiating to below knee 49 patients (47.6%). The common etiologies of low back pain were lumbar spondylosis 37.9% and spinal stenosis 27.2%. History of back surgery was 28.2%. Antiepileptic drugs (84.5%) were the commonest prescribed medication. The long duration of low back pain showed

signifi cantly increased Epworth sleepiness scale, indicating poor sleep quality (p=0.043). Low back pain with neuropathic pain showed worse disability compared to back pain without this condition by SF-36, Physical Health domain (Physical functioning p-value = 0.047, Role limitation due to physical health p-value = 0.003).

Conclusions: The long duration of back pain was a strongly negative factor to sleep quality and neuropathic pain affected quality of life.