Study design and settings
This study is part of a multicenter cohort study from Colombia and Spain, called EPICO (Epidemiological study of respiratory infections caused by SARS-CoV-2 infection in pediatric population). This cohort´s results included data collected between April 2020 and November 2021 from 13 institutions in Colombia (distributed in 5 cities) and 55 institutions in Spain (distributed in 13 provinces). From this cohort, a subsample of Colombian children was selected to examine the association between radiology findings (chest x-rays) and clinical presentation, treatment, and outcomes throughout their hospital course. After excluding institutions in which remote visualization of chest radiographs in a PACS (Picture Archiving Communication System) program was unavailable, a total of 7 hospitals were included. Most of these hospitals (6 out of 7) were located in Bogotá, and all of them were private institutions providing fourth level of care.