Racial, ethnic, and sex disparities in buprenorphine treatment from emergency departments by discharge diagnosis.

OBJECTIVES

Racial and sex disparities are noted in the administration and prescribing of buprenorphine from emergency departments (EDs) nationally. It is unknown whether disparities persist when accounting for the specific discharge diagnosis addressed during encounters such as opioid overdose or withdrawal.

METHODS

We conducted a cross-sectional analysis of opioid-related ED encounters from January 2020 through December 2023 using a national database, Epic Cosmos. We analyzed the effect of opioid encounter subtype-overdose or withdrawal-on receipt of buprenorphine using multivariable logistic regression adjusting for demographics and measured confounding variables. Encounter subtypes were defined by diagnosis codes and buprenorphine receipt was defined as administration or prescribing. We evaluated for racial, ethnic, and sex disparities within encounter subtypes for withdrawal and overdose.

RESULTS

We examined 1,088,033 opioid-related encounters. Adjusted odds for buprenorphine receipt were greater for encounters involving withdrawal (odds ratio [OR] 2.22, 95% CI 2.18-2.26), though reduced for overdose (OR 0.52, 95% CI 0.51-0.53) and other opioid complications (OR 0.69, 95% CI 0.64-0.70). Males were more likely to receive buprenorphine (OR 1.18, 95% CI 1.16-1.19) than females. All racial minorities excepting American Indian/Native American patients (OR 1.04, 95% CI 1.00-1.08) were less likely to receive buprenorphine than White patients (Asian OR 0.85, 95% CI 0.79-0.81; Black OR 0.80, 95% CI 0.79-0.81; Native Hawaiian/Pacific Islander OR 0.79, 95% CI 0.71-0.89). Subtype analyses indicated decreased odds for buprenorphine receipt for female patients across all subtypes. An increased odds for buprenorphine receipt among Black patients (OR 1.04, 95% CI 1.01-1.07; ref. White race) was noted in encounters involving opioid withdrawal but disparities persisted for opioid overdose.

CONCLUSIONS

The administration and prescribing of buprenorphine in the ED is heavily influenced by the presence of opioid withdrawal. Disparities disadvantage female patients and racial minorities. Some racial disparities, particularly among Black patients, are not evident when solely considering encounters involving opioid withdrawal. System-level interventions are needed to address disparities and improve the equitable uptake of ED-initiated buprenorphine.