– Nyiendo et al (2000), Journal of Manipulative and Physiological Therapeutics http://www.spicerwellness.com/gpage22.html

In a Randomized controlled trial, 183 patients with neck pain were randomly allocated to manual therapy (spinal mobilization), physiotherapy (mainly exercise) or general practitioner care (counseling, education and drugs) in a 52-week study. The clinical outcomes measures showed that manual therapy resulted in faster recovery than physiotherapy and general practitioner care. Moreover, total costs of the manual therapy-treated patients were about one-third of the costs of physiotherapy or general practitioner care.

-- Korthals-de Bos et al (2003), British Medical Journal http://britishmedicaljournal.com/