title: Association of body mass index with major cardiovascular events and with mortality after percutaneous coronary intervention.
abstract: BACKGROUND
  Conflicting data exist regarding the relation between body mass index (BMI) and cardiovascular events and mortality after percutaneous coronary intervention.
  
  
  RESULTS
  We performed pooled analyses to evaluate the association between BMI (weight in kilograms divided by the square of the height in meters) and the risks of major cardiovascular events (defined as death from cardiovascular causes, nonfatal myocardial infarction, stent thrombosis, or stroke) and death among 23 181 patients from 11 prospective percutaneous coronary intervention studies. Overall, mean (±SD) BMI was 24.9±3.0. During follow-up (median, 2.1 years), 2381 patients had a major cardiovascular event, and 1004 patients died. After adjusting covariates, there was an inverse relationship between BMI and adverse outcomes. With a BMI of 22.5 to 24.9 as the reference category, the risk of major cardiovascular events was elevated among patients with a lower BMI (by a factor of 1.52 for a BMI <18.5; 1.05 for a BMI of 18.5-19.9; 1.03 for a BMI of 20.0-22.4); by contrast, the risk declined among patients with a higher BMI (by a factor of 0.97 for a BMI of 25.0-27.4; 0.97 for a BMI of 27.5-29.9; and 0.78 for a BMI of ≥30.0). In general, the hazard ratios for deaths were similar.
  
  
  CONCLUSIONS
  Among patients undergoing percutaneous coronary intervention, a low BMI was associated with increased risks of major cardiovascular events and death. However, there were no excess risks of these events associated with a high BMI.
authors.affiliation: Department of Cardiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Duk-Woo
authors.initials: DW
authors.lastname: Park
authors.forename: Young-Hak
authors.initials: YH
authors.lastname: Kim
authors.forename: Sung-Cheol
authors.initials: SC
authors.lastname: Yun
authors.forename: Jung-Min
authors.initials: JM
authors.lastname: Ahn
authors.forename: Jong-Young
authors.initials: JY
authors.lastname: Lee
authors.forename: Won-Jang
authors.initials: WJ
authors.lastname: Kim
authors.forename: Soo-Jin
authors.initials: SJ
authors.lastname: Kang
authors.forename: Seung-Whan
authors.initials: SW
authors.lastname: Lee
authors.forename: Cheol Whan
authors.initials: CW
authors.lastname: Lee
authors.forename: Seong-Wook
authors.initials: SW
authors.lastname: Park
authors.forename: Seung-Jung
authors.initials: SJ
authors.lastname: Park
mesh_terms: D000368:Aged; D017130:Angioplasty / Q000009:adverse effects / Q000401:mortality*; D015992:Body Mass Index; D003328:Coronary Thrombosis / Q000401:mortality*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000401:mortality*; D009765:Obesity / Q000401:mortality; D016016:Proportional Hazards Models; D012307:Risk Factors; D015607:Stents / Q000009:adverse effects*; D020521:Stroke / Q000401:mortality*