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Silber JH, Bellini LM, Shea JA, Desai SV, Dinges DF, Basner M, Even-Shoshan O, Hill AS, Hochman LL, Katz JT, Ross RN, Shade DM, Small DS, Sternberg AL, Tonascia J, Volpp KG, Asch DA. Patient Safety Outcomes under Flexible and Standard Resident Duty-Hour Rules. N Engl J Med 2019; 380:905-914. [PMID: 30855740 PMCID: PMC6476299 DOI: 10.1056/nejmoa1810642] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
BACKGROUND Concern persists that extended shifts in medical residency programs may adversely affect patient safety. METHODS We conducted a cluster-randomized noninferiority trial in 63 internal-medicine residency programs during the 2015-2016 academic year. Programs underwent randomization to a group with standard duty hours, as adopted by the Accreditation Council for Graduate Medical Education (ACGME) in July 2011, or to a group with more flexible duty-hour rules that did not specify limits on shift length or mandatory time off between shifts. The primary outcome for each program was the change in unadjusted 30-day mortality from the pretrial year to the trial year, as ascertained from Medicare claims. We hypothesized that the change in 30-day mortality in the flexible programs would not be worse than the change in the standard programs (difference-in-difference analysis) by more than 1 percentage point (noninferiority margin). Secondary outcomes were changes in five other patient safety measures and risk-adjusted outcomes for all measures. RESULTS The change in 30-day mortality (primary outcome) among the patients in the flexible programs (12.5% in the trial year vs. 12.6% in the pretrial year) was noninferior to that in the standard programs (12.2% in the trial year vs. 12.7% in the pretrial year). The test for noninferiority was significant (P = 0.03), with an estimate of the upper limit of the one-sided 95% confidence interval (0.93%) for a between-group difference in the change in mortality that was less than the prespecified noninferiority margin of 1 percentage point. Differences in changes between the flexible programs and the standard programs in the unadjusted rate of readmission at 7 days, patient safety indicators, and Medicare payments were also below 1 percentage point; the noninferiority criterion was not met for 30-day readmissions or prolonged length of hospital stay. Risk-adjusted measures generally showed similar findings. CONCLUSIONS Allowing program directors flexibility in adjusting duty-hour schedules for trainees did not adversely affect 30-day mortality or several other measured outcomes of patient safety. (Funded by the National Heart, Lung, and Blood Institute and Accreditation Council for Graduate Medical Education; iCOMPARE ClinicalTrials.gov number, NCT02274818.).
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Affiliation(s)
- Jeffrey H Silber
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Lisa M Bellini
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Judy A Shea
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Sanjay V Desai
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - David F Dinges
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Mathias Basner
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Orit Even-Shoshan
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Alexander S Hill
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Lauren L Hochman
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Joel T Katz
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Richard N Ross
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - David M Shade
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Dylan S Small
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Alice L Sternberg
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - James Tonascia
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - Kevin G Volpp
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
| | - David A Asch
- From the Center for Outcomes Research, Children's Hospital of Philadelphia (J.H.S., O.E.-S., A.S.H., L.L.H., R.N.R.), the Departments of Pediatrics (J.H.S.), Anesthesiology and Critical Care (J.H.S.), and Medicine (L.M.B., J.A.S., K.G.V., D.A.A.), University of Pennsylvania School of Medicine, the Departments of Health Care Management (J.H.S., K.G.V., D.A.A.) and Statistics (D.S.S.), the Wharton School, the Leonard Davis Institute of Health Economics (J.H.S., J.A.S., D.S.S., K.G.V., D.A.A.), and the Department of Psychiatry (D.F.D., M.B.), University of Pennsylvania, and the Corporal Michael J. Crescenz Veterans Affairs Medical Center (K.G.V., D.A.A.) - all in Philadelphia; the Departments of Medicine (S.V.D.), Epidemiology (D.M.S., A.L.S., J.T.), and Biostatistics (J.T.), Johns Hopkins University, Baltimore; and the Department of Medicine, Brigham and Women's Hospital, Boston (J.T.K.)
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Patel MS, Volpp KG, Small DS, Hill AS, Even-Shoshan O, Rosenbaum L, Ross RN, Bellini L, Zhu J, Silber JH. Association of the 2011 ACGME resident duty hour reforms with mortality and readmissions among hospitalized Medicare patients. JAMA 2014; 312:2364-73. [PMID: 25490327 PMCID: PMC5546100 DOI: 10.1001/jama.2014.15273] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
IMPORTANCE Patient outcomes associated with the 2011 Accreditation Council for Graduate Medical Education (ACGME) duty hour reforms have not been evaluated at a national level. OBJECTIVE To evaluate the association of the 2011 ACGME duty hour reforms with mortality and readmissions. DESIGN, SETTING, AND PARTICIPANTS Observational study of Medicare patient admissions (6,384,273 admissions from 2,790,356 patients) to short-term, acute care, nonfederal hospitals (n = 3104) with principal medical diagnoses of acute myocardial infarction, stroke, gastrointestinal bleeding, or congestive heart failure or a Diagnosis Related Group classification of general, orthopedic, or vascular surgery. Of the hospitals, 96 (3.1%) were very major teaching, 138 (4.4%) major teaching, 442 (14.2%) minor teaching, 443 (14.3%) very minor teaching, and 1985 (64.0%) nonteaching. EXPOSURE Resident-to-bed ratio as a continuous measure of hospital teaching intensity. MAIN OUTCOMES AND MEASURES Change in 30-day all-location mortality and 30-day all-cause readmission, comparing patients in more intensive relative to less intensive teaching hospitals before (July 1, 2009-June 30, 2011) and after (July 1, 2011-June 30, 2012) duty hour reforms, adjusting for patient comorbidities, time trends, and hospital site. RESULTS In the 2 years before duty hour reforms, there were 4,325,854 admissions with 288,422 deaths and 602,380 readmissions. In the first year after the reforms, accounting for teaching hospital intensity, there were 2,058,419 admissions with 133,547 deaths and 272,938 readmissions. There were no significant postreform differences in mortality accounting for teaching hospital intensity for combined medical conditions (odds ratio [OR], 1.00; 95% CI, 0.96-1.03), combined surgical categories (OR, 0.99; 95% CI, 0.94-1.04), or any of the individual medical conditions or surgical categories. There were no significant postreform differences in readmissions for combined medical conditions (OR, 1.00; 95% CI, 0.97-1.02) or combined surgical categories (OR, 1.00; 95% CI, 0.98-1.03). For the medical condition of stroke, there were higher odds of readmissions in the postreform period (OR, 1.06; 95% CI, 1.001-1.13). However, this finding was not supported by sensitivity analyses and there were no significant postreform differences for readmissions for any other individual medical condition or surgical category. CONCLUSIONS AND RELEVANCE Among Medicare beneficiaries, there were no significant differences in the change in 30-day mortality rates or 30-day all-cause readmission rates for those hospitalized in more intensive relative to less intensive teaching hospitals in the year after implementation of the 2011 ACGME duty hour reforms compared with those hospitalized in the 2 years before implementation.
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Affiliation(s)
- Mitesh S Patel
- Center for Health Equity Research and Promotion, Veterans Administration Hospital, Philadelphia, Pennsylvania2Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia3Department of Health Care Management, The Wharton S
| | - Kevin G Volpp
- Center for Health Equity Research and Promotion, Veterans Administration Hospital, Philadelphia, Pennsylvania2Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia3Department of Health Care Management, The Wharton S
| | - Dylan S Small
- The Leonard Davis Institute, Center for Health Incentives and Behavioral Economics, University of Pennsylvania, Philadelphia6Department of Statistics, The Wharton School, University of Pennsylvania, Philadelphia
| | - Alexander S Hill
- Center for Outcomes Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Orit Even-Shoshan
- Center for Outcomes Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania8Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia
| | - Lisa Rosenbaum
- Department of Medicine, Brigham and Womens Hospital, Boston, Massachusetts
| | - Richard N Ross
- Center for Outcomes Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Lisa Bellini
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia
| | - Jingsan Zhu
- Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia4The Leonard Davis Institute, Center for Health Incentives and Behavioral Economics, University of Pennsylvania, Philadelphia
| | - Jeffrey H Silber
- Department of Health Care Management, The Wharton School, University of Pennsylvania, Philadelphia7Center for Outcomes Research, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania8Leonard Davis Institute of Health Economics, University of
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