Hospitalisation for lower respiratory viral infections in older people in residential aged care facilities

Objective To quantify incidence, trends and outcomes associated with lower respiratory viral infection (LRVI) hospitalisations in Australian residential aged care facilities (RACFs). Methods A population-based cohort study of residents in RACFs aged >= 65 years from New South Wales (NSW), South Australia (SA) and Victoria (VIC) using data from the Registry of Senior Australians (2013-2016) was conducted. Age- and sex-standardised monthly and yearly LRVI hospitalisation incidences were calculated, and time trends and risk factors were assessed. Results Of 268 657 residents included over the study period, 12% had >= 1 LRVI hospitalisation. Average annual incidence/1000 residents was 7.1 [6.9-7.2] in 2013, increasing to 7.8 [7.7-8.1] in 2016. Males, increasing co-morbidity, presence of CHF, respiratory disease and hypertension had a higher incidence of LRVI hospitalisation. In-hospital mortality was 14%. Within 30 days following discharge, 15% died and 8% were readmitted. Conclusion Prior to COVID-19, incidence of hospitalisation for LRVI in Australia's residential aged care population was increasing and was associated with significant morbidity and mortality.