There are significant differences in outcome associated with age, primary diagnosis, and type of surgical procedure. Administrative databases may underestimate the incidence of complications, but these population-based studies may provide information for comparison with surgical case series and help evaluate rare or severe complications.

In the elderly, adjusted rates of cervical spine fusions rose 206% from 1992 to 2005. Marked geographic variation was noted. Future studies should evaluate the efficacy and complications associated with these procedures in the elderly, and better define surgical indications and patient outcome.

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