Abstract 13403: Relationship Between Body Mass Index and In-hospital Outcomes After Percutaneous Coronary Intervention Among Patients With Acute Myocardial Infarction: A National In-Patient Analysis

Abstract

Background: Body mass index (BMI), has been shown to be related to major adverse cardiovascular events, and overall mortality after percutaneous coronary intervention (PCI). However, the relationship between BMI, and important cardiovascular outcomes, as well as healthcare utilization have not been extensively explored in a national sample. Objectives: Examine the relationship between BMI and in-hospital mortality, cardiogenic shock, cardiac arrest, length of hospital stay (LOS), and cost of hospitalization. Methods: Adults who had a primary diagnosis of Acute Myocardial Infarction (AMI) who underwent a PCI were identified from the 2016 and 2017 National Inpatient Sample using ICD10 codes. BMI was classified BMI into: <20 kg/m 2 , 20-29.9 kg/m 2 (reference), 30-34.9 kg/m 2 (Obesity class I), 35-39.9 kg/m 2 (Obesity class II) and ≥40 kg/m 2 (Obesity class III). Weighted multivariable logistic and linear regression models were used as appropriate. Results: Among 22,953 patients who had AMI and PCI done with reported BMI, 67.9% were male, and 76.2% were Non-Hispanic White. Compared to the reference group, obesity class I, II and III, showed an incremental higher odd of mortality, while patients with BMI <20 kg/m 2 had non-significant lower odds of mortality (Table). Obesity class I and II had lower odds of cardiogenic shock compared to the reference group, while those in the extremes i.e. <20 kg/m 2 and ≥40 kg/m 2 showed no significant difference (Table).The odds of cardiac arrest were not significantly different across the various BMI categories (Table). Obesity class III patients had significantly higher mean LOS and cost of hospitalization compared to the reference group (Table). Conclusion: Our study highlights the relationship between BMI and important clinical outcomes after PCI. These findings buttress the need for healthcare providers to identify high risk patients for worse outcomes after PCI and institute targeted interventions for improved clinical outcomes.