Racial and ethnic disparities in ED use among older adults with asthma and primary care nurse practitioner work environments.

Background Nurse practitioners (NPs) increasingly deliver primary care in the United States. Yet, poor working conditions strain NP care. We examined whether racial/ethnic health disparities in ED visits among older adults with asthma are moderated by primary care NP work environments. Methods Survey data on NP work environments in six states were collected from 1,244 NPs in 2018-2019. 2018 Medicare claims data from 46,658 patients with asthma was merged with survey data to assess the associations of all-cause and ambulatory care sensitive conditions (ACSC) ED visits with NP work environment and race/ethnicity using logistic regression. Results NP work environment moderated the association of race (Black patients versus White patients) with all-cause (odds ratio [OR]: 0.91; p-value = 0.045) and ACSC (OR: 0.90; p-value = 0.033) ED visits. Conclusions Disparities in ED visits between Black and White patients with asthma decrease when these patients receive care in care clinics with favorable NP work environments.