Did migrants experience a COVID-19 mortality disadvantage in the Swedish care setting? An observational cohort study on type of care and mortality among older migrants in Sweden.

This study examines COVID-19 mortality across long-term care settings comparing migrants and Swedish-born during the first 2 years of the pandemic. Previous research shows that migrants faced higher risks of severe COVID-19 outcomes, contrasting with the observed Migrant Mortality Advantage. Using Swedish total population data (2019-22), we stratified participants aged 70+ by care setting and migration status. We analysed the first pandemic year (March 2020-February 2021) and the second year (March 2021-February 2022), alongside pre-pandemic mortality data for context. Outcome measures included all deaths from COVID-19 and other causes. Cox proportional hazards models were employed adjusting for sociodemographic and health variables. Our findings highlight the significant impact of care settings on COVID-19 mortality in the first pandemic year, exceeding that for other causes of death. Migrants born in low- or middle-income countries in institutional care had higher mortality rates (HR = 42.88, 95% CI = 36.69-50.13) than Swedish-born individuals in institutional care (HR = 25.83, 95% CI = 24.12-27.65) relative to Swedish-born with no care. This contrasts with mortality patterns for non-COVID causes before and during the pandemic, indicating a specific migrant disadvantage during the first year. In the second year, the excess COVID-19 mortality in care settings decreased yet continued to be higher for migrants than for Swedish-born, likely influenced by the equalizing effect of vaccinations. Despite mitigation efforts, a clear migrant mortality disadvantage persisted among those receiving home care or living in care homes.