Utilization of Surveillance after Polypectomy in the Medicare Population – A Cohort Study

Iris Lansdorp-Vogelaar, Stacey Fedewa, Chun Chieh Lin, Katherine S Virgo and Ahmedin Jemal

PLOS ONE, 2014, vol. 9, issue 11, 1-8

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

Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0110937

DOI: 10.1371/journal.pone.0110937

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