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- W2142302684 abstract "Background: Surveillance in patients with previous polypectomy was underused in the Medicare population in 1994. This study investigates whether expansion of Medicare reimbursement for colonoscopy screening in high-risk individuals has reduced the inappropriate use of surveillance.Methods: We used Kaplan-Meier analysis to estimate time to surveillance and polyp recurrence rates for Medicare beneficiaries with a colonoscopy with polypectomy between 1998 and 2003 who were followed through 2008 for receipt of surveillance colonoscopy. Generalized Estimating Equations were used to estimate risk factors for: 1) failing to undergo surveillance and 2) polyp recurrence among these individuals. Analyses were stratified into three 2-year cohorts based on baseline colonoscopy date.Results: Medicare beneficiaries undergoing a colonoscopy with polypectomy in the 1998- 1999 (n=4,136), 2000-2001 (n=3,538) and 2002-2003 (n=4,655) cohorts had respective probabilities of 30%, 26% and 20% (p<0.001) of subsequent surveillance events within 3 years. At the same time, 58%, 52% and 45% (p<0.001) of beneficiaries received a surveillance event within 5 years. Polyp recurrence rates after 5 years were 36%, 30% and 26% (p<0.001) respectively. Older age (≥ 70 years), female gender, later cohort (2000- 2001 & 2002-2003), and severe comorbidity were the most important risk factors for failure to undergo a surveillance event. Male gender and early cohort (1998-1999) were the most important risk factors for polyp recurrence.Conclusions: Expansion of Medicare reimbursement for colonoscopy screening in high- risk individuals has not reduced underutilization of surveillance in the Medicare population. It is important to take action now to improve this situation, because polyp recurrence is substantial in this population." @default.
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- W2142302684 date "2014-10-09" @default.
- W2142302684 modified "2023-10-17" @default.
- W2142302684 title "Utilization of surveillance after polypectomy in the Medicare population" @default.
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