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Original Investigation |

Understanding Variation in 30-Day Surgical Readmission in the Era of Accountable Care Effect of the Patient, Surgeon, and Surgical Subspecialties

Faiz Gani, MBBS1; Donald J. Lucas, MD, MPH2; Yuhree Kim, MD, MPH1; Eric B. Schneider, PhD1; Timothy M. Pawlik, MD, MPH, PhD1
[+] Author Affiliations
1Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
2Department of Surgery, Walter Reed National Military Medical Center, Bethesda, Maryland
JAMA Surg. 2015;150(11):1042-1049. doi:10.1001/jamasurg.2015.2215.
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Importance  Readmission is a target area of quality improvement in surgery. While variation in readmission is common, to our knowledge, no study has specifically examined the underlying etiology of this variation among a variety of surgical procedures performed in a large academic medical center.

Objective  To quantify the variability in 30-day readmission attributable to patient, surgeon, and surgical subspecialty levels in patients undergoing a major surgical procedure.

Design, Setting, and Participants  Retrospective analysis of administrative claims data of patients discharged following a major surgical procedure at a tertiary care center between January 1, 2009, and, December 31, 2013. A total of 22 559 patients were included in this study and underwent a major surgical procedure performed by 56 surgeons practicing in 8 surgical subspecialties.

Main Outcomes and Measures  In-hospital morbidity, 30-day readmission, and proportional variation in 30-day readmission at patient, surgeon, and surgical subspecialty levels.

Results  Among the 22 559 patients in this study, patient age, race/ethnicity, and payer type differed across surgical subspecialties. Preoperative comorbidity was common and noted in 65.1% of patients. Postoperative complications were noted in 21.6% of patients varying from 2.1% following breast, melanoma or endocrine surgery to 37.0% following cardiac surgery. The overall 30-day readmission was 13.2% (n = 2975). Readmission varied considerably across the 8 different surgical subspecialties, ranging from 24.8% following transplant surgery (n = 557) to 2.1% following breast, melanoma, or endocrine surgery (n = 32). After adjusting for patient- and surgeon-level variables, factors associated with readmission included African American race/ethnicity (odds ratio, 1.23; 95% CI, 1.11-1.36; P < .001), increasing comorbidity (Charlson Comorbidity Index score of 1: odds ratio, 1.16; 95% CI, 1.02-1.32; P = .02; and a Charlson Comorbidity Index score of ≥2 : odds ratio, 1.38; 95% CI, 1.24-1.53; P < .001), postoperative complication (odds ratio, 1.19; 95% CI, 1.08-1.32; P = .001), and an extended length of stay (odds ratio, 1.78; 95% CI, 1.61-1.96; P < .001). The majority of the variation in readmission was attributable to patient-related factors (82.8%) while surgical subspecialty accounted for 14.5% of the variability, and individual surgeon-level factors accounted for 2.8%.

Conclusions and Relevance  Readmission occurred in more than 1 in 10 patients, with considerable variation across surgical subspecialties. Variation in readmission was overwhelmingly owing to patient-level factors while only a minority of the variation was attributable to factors at the surgical subspecialty and individual surgeon levels.

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Figure.
Proportions of Patients Readmitted Within 30 Days Following Discharge From the Index Hospitalization by Surgical Subspecialty and Individual Surgeon
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