Extended Data Table 2.
Underlying conditions associated with severe COVID-19 illness in the study cohort of children aged 3–5 years affiliated to FONASAa
| Comorbidity | Number of cases | |
|---|---|---|
| Female | Male | |
| Total participants | 241,429 | 249,265 |
| Chronic kidney disease | 5 | 3 |
| Congenital heart disease | 3,168 | 3,230 |
| Cancer | 318 | 385 |
| Diabetes mellitus types 1 and 2 | 114 | 144 |
| HIV | 534 | 575 |
| Epilepsy | 935 | 1,082 |
| Hemophilia | 68 | 154 |
| Asthma | 15,172 | 21,641 |
| Cystic fibrosis | 24 | 28 |
| Juvenile idiopathic arthritis | 34 | 12 |
| Systemic lupus erythematosus | 0 | 0 |
aThe study cohort included children 3–5 years of age affiliated to FONASA. We excluded children who had probable or confirmed COVID-19 according to RT–PCR assay for SARS-CoV-2 or antigen test before 6 December 2021.