b'Scientific Session Abstracts SUNDAY APRIL 21, 2024Table II: Associations of Patient BMI Categories with Short-Term Complicationsand Mortality After Open Lower Extremity Arterial Bypass Surgery: The VascularQuality Initiative (2003- 2020)Patient BMI CategoriesUnderweightNon-obeseOverweightClass 1Class 2 Class 3(n=2540) (n=19,118 (n=20,680 ObeseObeseObese (n=11,893) (n=4,451 (n=1,906)Outcome:30-day1.581 (ref) 0.640.650.660.61 Mortality (1.16-2.13) (0.53-0.78) (0.52-0.81) (0.48-0.90) (0.39-0.97)P-value 0.003 - 0.001 0.001 0.010 0.035Surgical Site0.971 (ref) 1.251.371.712.10 Infection (0.70-1.34) (1.08-1.46) (1.15-1.62) (1.38-2.12) (1.60-2.76)P-value 0.858 - 0.004 0.001 0.001 0.001Cardiovascular EventHeart Failure 1.171 (ref) 0.870.800.801.01 (0.80-1.70) (0.72-1.05) (0.64-1.00) (0.59-1.09) (0.68-1.48)P-value 0.419 - 0.143 0.055 0.154 0.971Postoperative1.021 (ref) 1.100.790.810.78 Stroke (0.54-1.92) (0.83-1.46) (0.55-1.12) (0.50-1.32) (0.39-1.57)P-value 0.951 - 0.502 0.187 0.394 0.491Myocardi al1.021 (ref) 0.820.780.660.74 Infarction (0.72-1.44) (0.71-0.96) (0.65-0.93) (0.51-0.86) (0.52-1.06)P-value 0.930 - 0.014 0.006 0.002 0.102Dysrhythmia 1.011 (ref) 0.930.910.860.85 (0.78-1.32) (0.82-1.06) (0.78-1.06) (0.69-1.06) (0.63-1.16)P-value 0.937 - 0.291 0.219 0.161 0.299*Reported are odds ratios (95% confidence interval) from regression models adjusting for age, sex, race, , procedure length, estimated blood loss, functional status, diabetes, dialysis, heart failure,prior CABG, smoking, prior peripheral stenting/bypass, preoperative use of aspirin, statin, and preoperative hemoglobin. Bold indicates p 0.05.106SOUTHERN CALIFORNIA VASCULAR SURGICAL SOCIETY'