Weight Loss Surgery Reduces Healthcare Resource Utilization and All-Cause Inpatient Mortality in Morbid Obesity: a Propensity-Matched Analysis

Somashekar G. Krishna, Varun Rawal, Claire Durkin, Rohan M. Modi, Alice Hinton, Zobeida Cruz-Monserrate, Darwin L. Conwell, Hisham Hussan

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Aims: There is a lack of population studies evaluating the impact of bariatric surgery (BRS) on all-cause inpatient mortality. We sought to determine the impact of prior BRS on all-cause mortality and healthcare utilization in hospitalized patients. Methods: We analyzed the National Inpatient Sample database from 2007 to 2013. Participants were adult (≥ 18 years) inpatients admitted with a diagnosis of morbid obesity or a history of BRS. Propensity score-matched analyses were performed to compare mortality and healthcare resource utilization (hospital length of stay and cost). Results: There were 9,044,103 patient admissions with morbid obesity and 1,066,779 with prior BRS. A propensity score-matched cohort analysis demonstrated that prior BRS was associated with decreased mortality (OR = 0.58; 95% CI [0.54, 0.63]), shorter length of stay (0.59 days; P < 0.001), and lower hospital costs ($2152; P < 0.001) compared to morbid obesity. A subgroup of propensity score-matched analysis among patients with high-risk of mortality (leading ten causes of mortality in morbid obesity) revealed a consistently significant reduction in odds of mortality for patients with prior BRS (OR = 0.82; 95% CI [0.72, 0.92]). Conclusion and Relevance: Hospitalized patients with a history of BRS have lower all-cause mortality and healthcare resource utilization compared to those who are morbidly obese. These observations support the continued application of BRS as an effective and resource-conscious treatment for morbid obesity.

Original languageEnglish
Pages (from-to)3213-3220
Number of pages8
JournalObesity Surgery
Issue number10
StatePublished - Oct 1 2018

Bibliographical note

Funding Information:
Funding Information This work was funded in part by the Ohio State University College of Medicine Roessler Medical Student Research Scholarship (VR).

Publisher Copyright:
© 2018, Springer Science+Business Media, LLC, part of Springer Nature.


  • Bariatric surgery
  • Inpatient mortality
  • Morbid obesity
  • National inpatient sample
  • Population database

ASJC Scopus subject areas

  • Surgery
  • Endocrinology, Diabetes and Metabolism
  • Nutrition and Dietetics


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