RT Journal Article SR Electronic T1 Risk Factors for ICU Admission for Respiratory Syncytial Virus in Young Children in the COVID Era: A Meta-Analysis JF The Annals of Family Medicine JO Ann Fam Med FD American Academy of Family Physicians SP 7139 DO 10.1370/afm.22.s1.7139 VO 22 IS Supplement 1 A1 Ssentongo, Anna A1 Parent, Leslie A1 Ssentongo, Paddy A1 Paul, Ian A1 Rabago, David YR 2024 UL http://www.annfammed.org/content/22/Supplement_1/7139.abstract AB Context Respiratory syncytial virus (RSV) is associated with substantial morbidity and mortality in young children. Established risk factors for ICU admission include congenital heart disease, prematurity, age <3 months, and chronic lung disease. With the emergence of the novel virus, SARS-COV-2 (COVID-19), and vaccines to prevent RSV, risk factors for ICU admission may be evolving.Objective To assess risk factors for RSV ICU admission during and after the emergence of COVID-19.Study Design and Analysis Systematic review and meta-analysis (Prospero registration CRD573007) that explored multiple databases for observational and randomized controlled studies assessing comorbidities as risk factors for ICU admission or proxies (mortality or the need for mechanical ventilation) before July 2024. Case reports, reviews and expert opinions were excluded. Data were analyzed using random-effects models.Setting or Dataset Hospital settingPopulation Studied Children younger than18 years old hospitalized with RSVIntervention/Instrument Not applicableOutcome Measures ICU admission or proxies (mortality or the need for mechanical ventilation).Results Among the 42 studies meeting inclusion/exclusion criteria, Down syndrome was the strongest risk factor for ICU admission in patients hospitalized for RSV (RR: 8.50, 95% CI: 3.32-21.76), followed by bronchopulmonary dysplasia/ chronic lung disease (RR: 5.05, 95% CI: 1.10-23.05), HIV (RR: 3.3, 95% CI: 1.2-4.8), congenital heart disease (RR: 3.67, 95% CI: 2.10-6.42), age <3 months (RR: 3.10, 95% CI: 1.38-6.93), prematurity (RR: 3.07, 95%CI 2.01-4.59), and malnutrition or underweight (RR: 1.51, 95%CI: 1.25-1.85). SARS-CoV-2 co-infection and tobacco smoke exposure were not associated with ICU admissions. Conversely, currently breastfeeding was associated with an 87% reduction in the risk of ICU admission from RSV (RR: 0.13, 95%CI 0.04-0.39).Conclusions SARS-CoV-2 co-infection did not influence RSV outcomes. Down syndrome and bronchopulmonary dysplasia/ chronic lung disease were the strongest predictors of admission to an ICU while current breast feeding was associated with an 87% reduction in ICU admission from RSV.