Serologic evolution and follow-up to IgG antibodies of infants born to mothers with gestational COVID

Table 1 Demographic and clinical characteristics of pregnant women

	Pregnant women n = 51
Age (years)	33.8 (29.5–36.4)
Ethnicity
- Caucasian - Latino American - Arabic	24 (47.1%) 25 (49.0%) 2 (3.9%)
Diagnostic test
- RT-PCR in NF swab - Serological test	42 (82.4) 9 (17.6%)
GA at diagnosis (w)	35.2 (28.2–38.4)
Any comorbidity	8 (15.7%)
Symptomatology	26 (51.0%)
Respiratory symptoms severity*
- Mild - Moderate - Severe	9 (64.3%) 5 (35.7%) 0 (0%)
Pneumonia COVID-19	5 (9.8%)
Specific treatment	4 (7.8%)
COVID hospitalization	5 (9.8%)
- ICU admission	0 (0%)
Days of admission	6 (6–6)
RT-PCR + at delivery	17 (33.3%)
Infection classification at delivery
- Acute infection - Recent infection - Past infection	5 (9.8%) 12 (23.5%) 34 (66.7%)

Severity of respiratory infection was stratified into mild (upper respiratory tract symptoms), moderate (pneumonia confirmed by chest X-ray without signs of severity) and severe (presence of hypoxemia with partial oxygen saturation [SatO2] < 90%, acute confusional state, or arterial hypotension)
Continuous variables are described as the median and interquartile range (IQR). Categorical variables as absolute frequencies and percentages
GA: gestational age, ICU: intensive care unit

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