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This review concludes that there is no evidence-based definition of maintenance care and the indications for and nature of its use remains to be clearly stated. The prevalence with which maintenance care is used has not been established. Efficacy and cost-effectiveness of maintenance care for various types of conditions are unknown. This conclusion is identical to that of a similar review published in 1996, namely that maintenance care is not well researched and that it needs to be investigated from several angles before the method is subjected to a multi-centre trial. Charlotte Leboeuf-Yde and Lise Hestbaek, Chiropractic and Osteopathy (8th May 2008)