The researchers, from the Northwest Center for Outcomes Research in Older Adults, performed a retrospective cohort study using a 20 percent sample of Medicare administrative claims submitted during the 2003 calendar year. The researchers analyzed data from 328,177 adults, 66 years old or older, who underwent outpatient colonoscopy examinations.
Independent predictors of anesthesia assistance included black race, female sex, and a non-screening indication; anesthesia assistance increased with median income and comorbidities. General and colorectal surgeons, fewer years in their practice, and non-hospital side of service were also significantly associated with anesthesia assistance.
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