Interestingly they did find differences. For example, they found that patients with private health insurance were more likely to have an anterior (operation from the front of the neck) than a posterior (operation from the back of the neck) procedure.
At present there is no definite evidence that outcomes are effected by the direction from which surgery is performed. In fact a large study published in 2013 found they were equally effective.
The significance of these findings therefore are unclear. But regardless, the identification that factors such as insurance status might influence a patient's care, are disappointing.
1. McClelland et al Impact of Race and Insurance Status on Surgical Approach for Cervical Spondylotic Myelopathy in the United States: a Population-Based Analysis. Spine (Phil) May 2016
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