• Thomas Andersen, Cody Bünger, and Rikke Søgaard.
• Spine Section, Orthopaedic Research Laboratory, Building 1A Orthopaedic Department, Aarhus University Hospital, Nørrebrogade 44, 8000, Aarhus C, Denmark. tba@dadlnet.dk
• Eur Spine J. 2013 May 1;22(5):977-84.

PurposeSpinal fusion surgery rates in the elderly are increasing. Cost effectiveness analyses with relatively short-length follow-up have been performed. But the long-term effects in terms of health care use are largely unknown. The aim of the present study was to describe the long-term consequences of spinal fusion surgery in elderly patients on health care use and costs using a health care system perspective.Methods194 patients undergoing spinal fusion between 2001 and 2005 (70 men, 124 women) with a mean age of 70 years (range 59-88) at surgery were included. Average length of follow-up was 6.2 years (range 0.3-9.0 years). Data on resource utilisation and costs were obtained from national registers providing complete coverage of all reimbursed contacts with primary- and secondary health care providers. Data were available from 3 years prior fusion surgery until the end of 2009.ResultsUse of hospital-based health care increased in the year prior to and the first year following surgery. Hereafter it normalised to the level of the background population and was mainly composed of diseases unrelated to the spine. In contrast, the use of primary health care appeared to increase immediately after surgery and continued to increase to a level that significantly exceeded that of the background population. It could be demonstrated that the increase was mainly due to an increasing number of general practitioner consultations.ConclusionSpinal fusion surgery in older patients does not generate excess hospital-based health care use in the longer term as compared with the background population, but primary care use increases.

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