Bivariate analysis of selected clinical and demographic variables and SARS-CoV-2 case classification (symptomatic vs asymptomatic) in newborns with confirmed SARS-CoV-2 infection during the first pandemic year in Colombia—March 2020 to February 2021
| Variable | Symptomatic (n) | Asymptomatic (n) | PR (95% CI) |
| Sex | |||
| Male | 296 | 133 | 0.9074 (0.8178 to 1.0070) |
| Female (ref) | 211 | 126 | |
| Birthweight category | |||
| ≥2500 g | 126 | 46 | 0.8342 (0.662 to 1.0511) |
| <2500 g (ref) | 33 | 21 | |
| Gestational age category | |||
| Preterm (<37 weeks) | 36 | 23 | 1.2056 (0.9651 to 1.5061) |
| Term (≥37 weeks) (ref) | 128 | 46 | |
| Low birth weight for gestational age* | |||
| No | 502 | 259 | 1.5159 (1.4405 to 1.5953) |
| Yes (ref) | 5 | 0 | |
| Presence of underlying conditions† | |||
| No | 465 | 253 | 1.331 (1.1397 to 1.5547) |
| Yes (ref) | 25 | 4 | |
In bold: with statistical significance
*Birth weight for gestational age and sex below the 10th percentile according to Fenton newborn growth standards.
†Grouped underlying conditions including respiratory disease, cardiac disease, malnutrition, tuberculosis, birth defects, congenital syphilis infection
PR, prevalence ratio.