(483) The Effect of BMI on Parotidectomy Outcomes - Retrospective Study

Introduction: Body mass index (BMI) is known to influence the prognosis of several surgical outcomes. The effect of BMI on the treatment of parotid tumors is still controversial and poorly understood. We aim to find the effect of BMI on a wide range of parotidectomy outcomes.

Methods: A single-center, multi-surgeon retrospective cohort study was performed on primary parotid tumor patients who underwent parotidectomy from 2004 to 2022. The primary focus was evaluating the association of BMI with parotidectomy complications. Univariate and logistic regression analysis tests were used to compare complications in the different BMI subgroups, adjusted logistic was finally performed to identify the factors associated with increase in overall complications. Spearman’s rank coefficient was used to see the correlation between BMI and number of complications.

Results: We accessed our database of 969 parotid cases. Of these, 589 patients met the inclusion criteria of primary parotid tumor. The mean age of the patients was 65.7 years (SD, 15.39). With respect to BMI: Patients with BMI of greater than 30 and normal BMI had no statistical difference in parotidectomy complication (OR: 1.07 95% CI 0.69 – 1.65, p=0.114) and patients with BMI of 25-29.9 and normal BMI patients also have no statistical significance difference in parotidectomy outcomes (OR: 1.26 95% CI, 0.81 – 1.97, p=0.276). The univariate and logistic regression analysis did not show a significant association between BMI and overall and each primary complication and adjusted multivariate analysis showed that diabetes mellitus (DM), hypertension (HT), and obstructive sleep apnea (OSA) are associated with increased complications (OR: 2.94 95% CI 1.50 – 5.7, p=0.002), (OR: 3.09 95% CI 1.94 – 4.94, p< 0.0001), (OR: 4.28 95% CI 1.97 – 9.2, p< 0.0001), respectively. There was no correlation between BMI and the number of complications (r= -0.028, p=0.494)

Conclusions: Hence evidence suggests that there is no association between BMI and overall complications. We found that patients with DM, HT and OSA have significantly greater chance of developing complications after parotidectomy.