Wilkey, Gregory, Byfield, & McCarthy (2008) studied randomized clinical trials comparing chiropractic care to medical care in a pain clinic. "The treatment regimens employed by the pain clinic in this study consisted of standard pharmaceutical therapy (nonsteroidal anti-inflammatory drugs, analgesics, and gabapentin), facet joint injection, and soft-tissue injection. Transcutaneous electrical nerve stimulation (TENS) machines were also employed. These modalities were used in isolation or in combination with any of the other treatments. Chiropractic group subjects followed an equally unrestricted and normal clinical treatment regimens for the treatment of [chronic low back pain] were followed. All techniques that were employed are recognized within the chiropractic profession as methods used for the treatment of [low back pain]. Many of the methods used are common to other manual therapy professions" (p. 466-467).
After 8 weeks of treatment, the 95% confidence intervals based on the raw scores showed improvement was 1.99 for medicine and 9.03 for the chiropractic group. This research indicates that chiropractic is 457% more effective than medicine for chronic low back pain. To say that the medical approach doesn't have a place in healthcare would be inaccurate and irresponsible, but based upon evidenced based outcome studies, research concludes that for chronic low back pain, the path is chiropractic first and drugs 457% second. Chiropractic is clinically indicated by "peer reviewed research" for chronic low back pain patients.
Reference: Wilkey, A., Gregory M., Byfield, D., & McCarthy, P. W.(2008). A comparison between chiropractic management and pain clinic management for chronic low-back pain in a national health service outpatient clinic. The Journal of Alternative and Complementary Medicine, 14(5), 465-473.