Low Back Pain of Mechanical Origin: Randomized Comparison of Chiropractic and Hospital Outpatient Treatment

Reprinted with permission from the British Medical Journal 300:1431-1437.1990. Objective - To compare chiropractic and hospital outpatient treatment for managing low back pain of mechanical origin.Design - Randomized controlled trial. Allocation to chiropractic or hospital management by minimization to establish groups for analysis of results according to initial referral clinic, length of current episode, history, and severity of back pain. Patients were followed up for up to two years.Setting - Chiropractic and hospital outpatient clinics in 11 centers.Patients - 741 patients aged 18-65 who had no contraindications to manipulation and who had not been treated within the past month.Interventions - Treatment at the discretion of the chiropractors, who used chiropractic manipulation in most patients, or of the hospital staff, who most commonly used Maitland mobilization or manipulation, or both.Main outcome measures - Changes in the score on the Oswestry pain disability questionnaire and in the results of tests of straight leg raising and lumbar flexion.Results - Chiropractic treatment was more effective than hospital outpatient management, mainly for patients with chronic or severe back pain. A benefit of about 7 percent points on the Oswestry scale was seen at two years. The benefit of chiropractic treatment became more evident throughout the follow-up period. Secondary outcome measures also showed that chiropractic was more beneficial.Conclusions - For patients with low back pain in whom manipulation is not contraindicated, chiropractic almost certainly confers worthwhile, long-term benefit in comparison with hospital outpatient management. The benefit is seen mainly in those with chronic or severe pain. Introducing chiropractic into NHS practice should be considered.J Orthop Sports Phys Ther 1991;13(6):278-287.