Relation of Bariatric Surgery to Inpatient Cardiovascular Outcomes (From the National Inpatient Sample).

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Approximately one in three individuals in the United States are obese. There is a strong association between obesity and an increased rate of cardiovascular disease (CVD)-related mortality. Bariatric surgery (BS) has emerged as an effective strategy to achieve reduction of excess weight. Our study aims to explore the relationship between BS and major adverse cardiovascular events (MACE) among obese hospitalized patients in the United States. This is a retrospective study of all obese adult patients with BMI ≥35 kg/m2 (n= 1,700,943) in the National Inpatient Sample between 2012 to 2016. Differences in the clinical characteristics of obese patients with a history of BS versus obese patients without a history of BS were analyzed as well as the association between BS and MACE after adjusting for CVD risk factors. Among 50,296 obese patients with a history of BS (2.96%), the mean age was 53 ± 12 years with the majority being female (75.32%) and Caucasian (71.85%). Multivariate analysis revealed that obese patients with a history of BS had a1.6-fold decrease odds of MACE compared to patients without BS (OR 0.62; 95% CI, 0.60-0.65; P<0.001). In conclusion, this study illustrates that among obese patients with BMI ≥35 kg/m2, history of BS was associated with a significantly lower odds of inpatient MACE, after adjusting for CVD risk factors.

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