From the establishment of in-patient chiropractic sanitariums to publication of a text with contributions from two Nobel Laureates, doctors of chiropractic have a long history of providing care for persons with mental health issues. The PRISM (Psychological response in spinal manipulation) study was a systematic review of psychological outcomes in twelve randomised controlled trials. The authors reported a small improvement in mental health after spinal manipulation compared with verbal interventions and other physical treatments, with small and medium sized standardized mean differences (SMDs) in favor of manipulation compared to primary care and advice. The potential of chiropractic care to improve psychological outcomes deserves further exploration.
Williams NH1, Hendry M, Lewis R, Russell I, Westmoreland A, Wilkinson C: Psychological response in spinal manipulation (PRISM): a systematic review of psychological outcomes in randomised controlled trials. Complement Ther Med. 2007 Dec;15(4):271-83. Epub 2007 Mar 8.