Disparities in Postoperative Opioid Prescribing by Race and Ethnicity: An Electronic Health Records-Based Observational Study

Abstract

Background: Prior studies on disparities in postoperative opioid prescribing have focused primarily on in-hospital opioid administration or long-term opioid use, with fewer studies examining discharge opioid prescribing for adults, and no studies looking across different surgical subspecialties or service lines. We sought to examine racial and ethnic disparities in postoperative opioid prescribing to test the hypothesis that racial and ethnic minority groups receive opioid prescriptions at postoperative discharge with lower morphine milligram equivalents (MME) than non-Hispanic whites (NHW). Methods: We utilized electronic health records (EHR) data across 24 hospitals from a healthcare delivery system in northern California from January 1, 2015 to February 2, 2020 (study period). The sample included adult patients undergoing a procedure during the study period, discharged to home with an opioid prescription. Cross-sectional, secondary data analyses were conducted to examine differences by race and ethnicity in opioid prescribing, measured as MME, among patients who underwent select, but commonly performed, surgical procedures. Linear regression models included adjustment for factors that would likely influence prescribing decisions and race and ethnicity-specific propensity weights. Opioid prescribing, overall and by race and ethnicity, was also compared to postoperative opioid guidelines. Results: Among 61,564 patients, on adjusted regression analysis, non-Hispanic Black (NHB) patients received prescriptions with higher mean MME than NHW patients (+6.4% [95% confidence interval: 4.4%, 8.3%]), whereas Hispanic and non-Hispanic Asian patients received lower mean MME (-4.2% [-5.1%, -3.2%] and -3.6% [-4.8%, -2.3%], respectively). Nevertheless, 72.8% of all patients received prescriptions above guidelines, ranging from 71.0% to 80.3% by race and ethnicity. Disparities in prescribing were eliminated among Hispanic and NHB patients versus NHW patients when prescriptions were written within guideline recommendations. Conclusions: Racial and ethnic disparities in opioid prescribing exist in the postoperative setting, yet all groups received prescriptions above guideline recommendations. Policies encouraging guideline-based postoperative prescribing can reduce disparities and overall excess prescribing.