How Chronic Back Pain Can Affect Quality of Life.
Nearly a third (32.9%) of patients receiving pharmaceutical treatment for chronic low back pain report that their current medication does not improve their pain, according to a study of over 3,000 chronic low back pain patients in South Korea. Among the patients surveyed, 67% classified their pain as moderate to severe, 43.5% had been in pain for more than two years, 32.4% had trouble sleeping because of their pain.
Asian Spine Journal, June 2014