HHS Public Access Author manuscript Author Manuscript
Cancer. Author manuscript; available in PMC 2017 September 01. Published in final edited form as: Cancer. 2016 September 1; 122(17): 2739–2746. doi:10.1002/cncr.30111.
Early impact of Medicare Accountable Care Organizations on cancer surgery outcomes Lindsey A. Herrel, MD MS1, Edward C. Norton, PhD2,3,4, Scott R. Hawken, MS1, Zaojun Ye, MS1, Brent K. Hollenbeck, MD MS1, and David C. Miller, MD MPH1 1Dow
Division for Urological Health Services Research, Department of Urology, University of Michigan, Ann Arbor
Author Manuscript
2Department
of Health Management and Policy, University of Michigan, Ann Arbor
3Department
of Economics, University of Michigan, Ann Arbor
4National
Bureau of Economic Research
Abstract Background—Accountable Care Organizations (ACOs) were established to improve care and outcomes for beneficiaries requiring highly coordinated, complex care. Our objective was to evaluate the association between hospital ACO participation and outcomes of major surgical oncology procedures.
Author Manuscript
Methods—We performed a retrospective cohort study of Medicare beneficiaries >65 years old undergoing a major surgical resection for colorectal, bladder, esophageal, kidney, liver, ovarian, pancreatic, lung or prostate cancer from 2011 through 2013. We implemented a difference-indifferences analysis comparing the post-implementation period (January 2013 through December 2013) to the baseline period (January 2011 through December 2012), to assess the impact of hospital ACO participation on 30-day mortality, complications, readmissions and length of stay. Results—Among 384,519 patients undergoing major cancer surgery at 106 ACO hospitals and 2,561 control hospitals, we identified a 30-day mortality rate of 3.4%, readmission rate of 12.5%,
Author Manuscript
Corresponding author: David C. Miller MD, MPH, Associate Professor, Department of Urology, University of Michigan, NCRC Building 16, Room 108E, 2800 Plymouth Road, Ann Arbor, MI 48109-2800, Phone: (734) 936-0054, Fax: (734) 232-2400, [email protected]. Author Contributions Conceptualization: LAH, ECN, SRH, ZY, DCM Methodology: LAH, ECN, SRH, ZY, DCM Software: LAH, ECN, ZY Validation: LAH, ECN, ZY, DCM Formal analysis: LAH, ECN, Investigation: LAH, ECN, ZY, DCM Resources: LAH, ECN, ZY, DCM Data curation: LAH, ECN, SRH, ZY, DCM Writing (original draft): LAH, ECN, DCM Writing (review and editing): LAH, ECN, SRH, ZY, DCM Visualization: LAH, ECN, SRH, ZY, DCM Supervision: LAH, ECN, DCM Project administration: ECN, DCM Funding acquisition: LAH, DCM No conflicts of interest.
Herrel et al.
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complication rate of 43.8% and prolonged LOS rate of 10.0% in control hospitals, with similar rates in ACO hospitals. We noted secular trends, with reductions in perioperative adverse events in control hospitals between the baseline and post-implementation periods: mortality (0.1% percentage point reduction, p=0.19), readmissions (0.4%, p=0.001), complications (1.0%, p
Cancer. Author manuscript; available in PMC 2017 September 01. Published in final edited form as: Cancer. 2016 September 1; 122(17): 2739–2746. doi:10.1002/cncr.30111.
Early impact of Medicare Accountable Care Organizations on cancer surgery outcomes Lindsey A. Herrel, MD MS1, Edward C. Norton, PhD2,3,4, Scott R. Hawken, MS1, Zaojun Ye, MS1, Brent K. Hollenbeck, MD MS1, and David C. Miller, MD MPH1 1Dow
Division for Urological Health Services Research, Department of Urology, University of Michigan, Ann Arbor
Author Manuscript
2Department
of Health Management and Policy, University of Michigan, Ann Arbor
3Department
of Economics, University of Michigan, Ann Arbor
4National
Bureau of Economic Research
Abstract Background—Accountable Care Organizations (ACOs) were established to improve care and outcomes for beneficiaries requiring highly coordinated, complex care. Our objective was to evaluate the association between hospital ACO participation and outcomes of major surgical oncology procedures.
Author Manuscript
Methods—We performed a retrospective cohort study of Medicare beneficiaries >65 years old undergoing a major surgical resection for colorectal, bladder, esophageal, kidney, liver, ovarian, pancreatic, lung or prostate cancer from 2011 through 2013. We implemented a difference-indifferences analysis comparing the post-implementation period (January 2013 through December 2013) to the baseline period (January 2011 through December 2012), to assess the impact of hospital ACO participation on 30-day mortality, complications, readmissions and length of stay. Results—Among 384,519 patients undergoing major cancer surgery at 106 ACO hospitals and 2,561 control hospitals, we identified a 30-day mortality rate of 3.4%, readmission rate of 12.5%,
Author Manuscript
Corresponding author: David C. Miller MD, MPH, Associate Professor, Department of Urology, University of Michigan, NCRC Building 16, Room 108E, 2800 Plymouth Road, Ann Arbor, MI 48109-2800, Phone: (734) 936-0054, Fax: (734) 232-2400, [email protected]. Author Contributions Conceptualization: LAH, ECN, SRH, ZY, DCM Methodology: LAH, ECN, SRH, ZY, DCM Software: LAH, ECN, ZY Validation: LAH, ECN, ZY, DCM Formal analysis: LAH, ECN, Investigation: LAH, ECN, ZY, DCM Resources: LAH, ECN, ZY, DCM Data curation: LAH, ECN, SRH, ZY, DCM Writing (original draft): LAH, ECN, DCM Writing (review and editing): LAH, ECN, SRH, ZY, DCM Visualization: LAH, ECN, SRH, ZY, DCM Supervision: LAH, ECN, DCM Project administration: ECN, DCM Funding acquisition: LAH, DCM No conflicts of interest.
Herrel et al.
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Author Manuscript
complication rate of 43.8% and prolonged LOS rate of 10.0% in control hospitals, with similar rates in ACO hospitals. We noted secular trends, with reductions in perioperative adverse events in control hospitals between the baseline and post-implementation periods: mortality (0.1% percentage point reduction, p=0.19), readmissions (0.4%, p=0.001), complications (1.0%, p
