Cited by 4,668Bariatric Surgery and OutcomesObesity, Physical Activity, DietBody Contouring and Surgery

Effects of Bariatric Surgery on Mortality in Swedish Obese Subjects

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Sjöström, Lars, Narbro, Kristina, Sjöström, C. David, Karason, Kristjan, Larsson, Bo, Wedel, Hans, Lystig, Ted, Sullivan, Marianne +15 more·2007·New England Journal of Medicine

Abstract

BACKGROUND: Obesity is associated with increased mortality. Weight loss improves cardiovascular risk factors, but no prospective interventional studies have reported whether weight loss decreases overall mortality. In fact, many observational studies suggest that weight reduction is associated with increased mortality. METHODS: The prospective, controlled Swedish Obese Subjects study involved 4047 obese subjects. Of these subjects, 2010 underwent bariatric surgery (surgery group) and 2037 received conventional treatment (matched control group). We report on overall mortality during an average of 10.9 years of follow-up. At the time of the analysis (November 1, 2005), vital status was known for all but three subjects (follow-up rate, 99.9%). RESULTS: The average weight change in control subjects was less than +/-2% during the period of up to 15 years during which weights were recorded. Maximum weight losses in the surgical subgroups were observed after 1 to 2 years: gastric bypass, 32%; vertical-banded gastroplasty, 25%; and banding, 20%. After 10 years, the weight losses from baseline were stabilized at 25%, 16%, and 14%, respectively. There were 129 deaths in the control group and 101 deaths in the surgery group. The unadjusted overall hazard ratio was 0.76 in the surgery group (P=0.04), as compared with the control group, and the hazard ratio adjusted for sex, age, and risk factors was 0.71 (P=0.01). The most common causes of death were myocardial infarction (control group, 25 subjects; surgery group, 13 subjects) and cancer (control group, 47; surgery group, 29). CONCLUSIONS: Bariatric surgery for severe obesity is associated with long-term weight loss and decreased overall mortality.

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  1. [23]23. Steinbrook R. Surgery for severe obe- sity. N Engl J Med 2004;350:1075-9.
  2. [38]38. among Medicare beneficiaries undergo- ing bariatric surgical procedures. JAMA 2005;294:1903-8.

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Authors
Sjöström, L., Narbro, K., Sjöström, C. D., Karason, K., Larsson, B., Wedel, H., Lystig, T., Sullivan, M., Bouchard, C., Carlsson, B., Bengtsson, C., Dahlgren, S., Gummesson, A., Jacobson, P., Karlsson, J., Lindroos, A.-K., Lönroth, H., Näslund, I., Olbers, T., Stenlöf, K., Torgerson, J., Ågren, G., & Carlsson, L. M. S.
Affiliations
  • Pennington Biomedical Research Center (US)
  • University of Gothenburg (SE)
  • Nordic School of Public Health (SE)
  • MRC Elsie Widdowson Laboratory (GB)
  • Örebro University Hospital (SE)
  • Norra Älvsborgs Länssjukhus (SE)
Venue
New England Journal of Medicine
Published
2007-08-23
Volume
357
Issue
8
Pages
741-752
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
OpenAlex
W2104183837
Cited by
4,668
References
57
Citations by year
2026: 106 · 2025: 128 · 2024: 157 · 2023: 150 · 2022: 189 · 2021: 213 · 2020: 239 · 2019: 216 · 2018: 231 · 2017: 258 · 2016: 259 · 2015: 330 · 2014: 351 · 2013: 321 · 2012: 334
FWCI
280.20
Type
journal article
Language
en
Open access
Locations
  • New England Journal of Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Amgen
  • Bristol-Myers Squibb
  • Pfizer
  • AstraZeneca
  • GlaxoSmithKline
  • Sanofi
  • Novo Nordisk
  • Servier
  • Medical Research Council
Topics
  • Health Sciences › Medicine › Surgery › Bariatric Surgery and Outcomes
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
  • Health Sciences › Medicine › Surgery › Body Contouring and Surgery
Keywords
bariatric surgery, obesity, mortality, weight loss, gastric bypass, vertical banded gastroplasty, gastric banding, myocardial infarction, cancer mortality, Swedish Obese Subjects study
MeSH terms
Cardiovascular Diseases, Female, Follow-Up Studies, Humans, Male, Middle Aged, Obesity, Risk Factors, Sweden, Weight Loss, Body Mass Index, Multivariate Analysis, Case-Control Studies, Bariatric Surgery

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