Class 3 obesity is not associated with same-day admission in obese patients undergoing parathyroidectomy.

Abstract Importance Rising rates of obesity and outpatient performance of parathyroidectomies are making it increasingly crucial to investigate the association of obesity with post-operative complications. Objective To determine whether Class 3 obesity is associated with increased same-day admission compared to lower obesity classes following outpatient parathyroidectomy. Design Retrospective cohort study. Setting Outpatient surgery. Patients 12,973 patients ≥18 years old who underwent outpatient parathyroidectomy between 2014 and 2016, per the American College of Surgeons National Surgical Quality Improvement Program registry. Interventions Primary exposure variable: body mass index (BMI), with patients assigned to one of six cohorts. Measurements Primary outcome measure: same-day admission. Secondary outcome measure: 30-day readmission. Logistic regression was used to calculate odds ratios (OR) and 95% confidence intervals (CI). Main results There was a final sample size of 12,973 adult patients who underwent parathyroidectomy from 2014 to 2016. The admission rate for BMI ≥30 and  Conclusions There is no significant difference in rates of same-day admission or 30-day readmission between any Class 3 (BMI ≥40 kg/m2) obesity cohort and the Class 1 and 2 (BMI ≥30 and