ISSN : 1301-5680
e-ISSN : 2149-8156
Turkish Journal of Thoracic and Cardiovascular Surgery     
Effects of body mass index on the early surgical outcomes after coronary artery bypass grafting
Jamshid Bagheri1, Fereshteh Rezakhanloo1, Ali Kord Valeshabad2, Amin Bagheri1
Cardiac Surgery and Transplantation Research Center (CTRC), Tehran University of Medical Sciences, Tehran, Iran
1Cardiac Surgery and Transplantation Research Center (CTRC), Tehran University of Medical Sciences, Tehran, Iran
2Farzan Clinical Research Institute, Tehran, Iran
3Postdoctoral Research Fellow, Department of Ophthalmology and Visual Sciences, University of Illinois at Chicago, Chicago, IL, USA
DOI : 10.5606/tgkdc.dergisi.2014.8680
Background: This study aims to investigate the effects of body mass index (BMI) on early surgical outcomes of coronary artery bypass grafting (CABG).

Methods: Between August 2007 and March 2011, a total of 1,673 consecutive patients (1,209 males, 464 females; mean age 58.6±9.9 years; range 21 to 87 years) who underwent isolated CABG at Shariati Hospital, Tehran, Iran were retrospectively analyzed. The patients were classified into four groups based on the BMI values: underweight (BMI ≤19 kg/m2, n=55), normal/overweight (BMI 20-29 kg/m2, n=523), obese (BMI 30-39 kg/m2, n=739) and morbidly obese (BMI ≥40 kg/m2, n=356). Preoperative characteristics were compared among the four groups. Effects of BMI on postoperative mortality and morbidity were evaluated using the stepwise multivariate logistic regression analysis.

Results: There was no significant difference in the mortality rate among the groups. Intra-aortic balloon pump (IABP) was the only independent predictor of postoperative mortality in the multivariate logistic regression analysis (OR=20.5, 95% CI=8.6-50.5; p<0.001). Body mass index was independently associated with postoperative pulmonary complications (OR=1.6, 95% CI=1.2-2.1; p=0.001).

Conclusion: Our study results suggest that BMI is an independent predictor of post-CABG pulmonary complications, but not of post-CABG mortality.

Keywords : Body mass index; coronary artery bypass grafting; mortality
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