BACKGROUND: Disparities in postoperative nausea and vomiting and its prophylaxis may exist based on race, ethnicity, and socioeconomic status. The objective was to evaluate whether patients from racial and ethnic minority groups and patients from lower socioeconomic status backgrounds received less appropriate postoperative nausea and vomiting prophylaxis and experienced higher rates of postoperative and postdischarge nausea and vomiting. METHODS: This retrospective cohort study included 23,333 adults who underwent major surgeries (total knee arthroplasty, cholecystectomy, hysterectomy, and prostatectomy) from 2017 to 2022 in a single, multistate hospital system. Outcomes included prophylactic antiemetic administration according to consensus guidelines, as well as the occurrence of postoperative and postdischarge nausea and vomiting, with predictors being patient race and ethnicity, payor type, and community-level socioeconomic status. RESULTS: About 45% (n = 10,407) of patients received guideline-recommended postoperative nausea and vomiting prophylaxis. Regression models showed statistically significant differences in appropriate postoperative nausea and vomiting prophylaxis by race and ethnicity, as well as community-level socioeconomic status, with Black (odds ratio, 0.76
95% CI, 0.63 to 0.92) and Hispanic (odds ratio, 0.82
95% CI, 0.70 to 0.96) patients having lower odds of receiving appropriate antiemetic prophylaxis compared to non-Hispanic White patients. Approximately 11% of patients (n = 2,522) experienced postoperative nausea and vomiting in the postanesthesia care unit, and about 19.5% of patients (n = 4,540) experienced postdischarge nausea and vomiting. No significant differences in postoperative nausea and vomiting were observed in the postanesthesia care unit among different groups
however, Black, Hispanic, other races and ethnicities, and patients with Medicaid had higher odds of postdischarge nausea and vomiting. CONCLUSIONS: The study identified differences in appropriate postoperative nausea and vomiting prophylaxis by race and ethnicity, as well as community-level socioeconomic status. There were no differences in postoperative nausea and vomiting by the predictors, but there were higher odds of postdischarge nausea and vomiting by race and ethnicity and payor. This study underscores the importance of data stratification in quality measures to identify disparities in perioperative care
it can lead to changes in perioperative anesthetic management. Further research should explore these associations in a broader cohort and address potential confounding sources.