The following excerpt shows Chiropractic care decreasing disability recurrence after injury.  It is one of the many research articles showing chiropractic to be the best treatment for reducing pain, reducing reocurrance, and best cost for back pain with people going to chiropractors decreasing health care cost vs. not going to a chiropractor

Health maintenance care in work-related low back pain and its association with disability recurrence.

J Occup Environ Med. 2011 Apr;53(4):396-404.

Cifuentes M, Willetts J, Wasiak R.
From the Center for Disability Research at the Liberty Mutual Research Institute for Safety (Dr Cifuentes and Ms Willetts) and University of Massachusetts Lowell (Dr Cifuentes), Hopkinton, Mass; and Center for Health Economics & Science Policy at United BioSource Corporation, London, United Kingdom (Dr Wasiak).

OBJECTIVES: To compare occurrence of repeated disability episodes across types of health care providers who treat claimants with new episodes of work-related low back pain (LBP).

METHOD: A total of 894 cases followed 1 year using workers’ compensation claims data. Provider types were defined for the initial episode of disability and subsequent episode of health maintenance care.

RESULTS: Controlling for demographics and severity, the hazard ratio [HR] of disability recurrence for patients of physical therapists (HR = 2.0; 95% confidence interval [CI] = 1.0 to 3.9) or physicians (HR = 1.6; 95% CI = 0.9 to 6.2) was higher than that of chiropractor (referent, HR = 1.0), which was similar to that of the patients non-treated after return to work (HR = 1.2; 95% CI = 0.4 to 3.8).

CONCLUSIONS: In work-related nonspecific LBP, the use of health maintenance care provided by physical therapist or physician services was associated with a higher disability recurrence than in chiropractic services or no treatment.