Fifty patients with neck and arm pain caused by an MRI-confirmed cervical disk herniation received chiropractic adjustments over a 90-day period. After two weeks, 55.3% of patients reported their pain had significantly improved. This number rose to 68.9% after one month and 85.7% after three months of care. No adverse events were reported.
Journal of Manipulative and Physiological Therapeutics, October 2013