AIMS: Obesity has significant adverse effects on cardiovascular health. Conflicting results have been reported regarding relationships between body mass index (BMI) and outcomes after coronary artery bypass grafting (CABG). We compared outcomes of CABG patients by BMI categories. METHODS: Isolated CABG performed between July 2010-June 2012 at Auckland City Hospital were categorised into four groups of BMI ≤25 (normal), >25-30 (overweight), >30-35 (obese) and >35 kg/m² (morbidly obese) retrospectively for analyses. RESULTS: The four groups had 181(22.4%), 320 (39.6%), 205 (25.3%) and 103 (12.7%) patients respectively. Increasing BMI was associated with younger age (p<0.001) and increasing creatinine clearance (p<0.001). Obesity was associated with a higher proportion of patients of Maori or Pacific ethnicity and patients with more hypertension. Morbid obesity was associated with female sex, higher mean New Zealand Deprivation Index, diabetes, longer operation time and sternal wound infection. Thirty-day mortality (p=0.702), composite morbidity (p=0.904) and survival (p=0.112) during 1.4 ± 0.6 years of follow-up were similar across BMI categories. CONCLUSION: Obesity was common and was present in over a third of patients undergoing CABG with 13% of the entire cohort being morbidly obese. Mortality and morbidity rates did not differ across BMI categories. Obesity should not be considered a risk factor for adverse outcomes after CABG and should not be a contraindication for surgery.
AIMS: Obesity has significant adverse effects on cardiovascular health. Conflicting results have been reported regarding relationships between body mass index (BMI) and outcomes after coronary artery bypass grafting (CABG). We compared outcomes of CABG patients by BMI categories. METHODS: Isolated CABG performed between July 2010-June 2012 at Auckland City Hospital were categorised into four groups of BMI ≤25 (normal), >25-30 (overweight), >30-35 (obese) and >35 kg/m² (morbidly obese) retrospectively for analyses. RESULTS: The four groups had 181(22.4%), 320 (39.6%), 205 (25.3%) and 103 (12.7%) patients respectively. Increasing BMI was associated with younger age (p<0.001) and increasing creatinine clearance (p<0.001). Obesity was associated with a higher proportion of patients of Maori or Pacific ethnicity and patients with more hypertension. Morbid obesity was associated with female sex, higher mean New Zealand Deprivation Index, diabetes, longer operation time and sternal wound infection. Thirty-day mortality (p=0.702), composite morbidity (p=0.904) and survival (p=0.112) during 1.4 ± 0.6 years of follow-up were similar across BMI categories. CONCLUSION:Obesity was common and was present in over a third of patients undergoing CABG with 13% of the entire cohort being morbidly obese. Mortality and morbidity rates did not differ across BMI categories. Obesity should not be considered a risk factor for adverse outcomes after CABG and should not be a contraindication for surgery.
Authors: Hongran Moon; Yeonhee Lee; Sejoong Kim; Dong Ki Kim; Ho Jun Chin; Kwon Wook Joo; Yon Su Kim; Ki Young Na; Seung Seok Han Journal: J Korean Med Sci Date: 2018-11-09 Impact factor: 2.153