Table 4.
Antibody positivity throughout the follow-up according to the time of serology, time and severity of maternal infection, and the mother’s vaccination status.
| IgG Negative (n = 62) | IgG Positive (n = 56) | Coefficient | Standard Error | p-Value | |
|---|---|---|---|---|---|
| Age of serology determination | |||||
| Intercept | −0.960 | 1.795 | 0.593 | ||
| 0–3 months | 38/82 (46.34%) | 44/82 (53.66%) | −6.451 | 1.249 | <0.001 |
| 3–6 months | 9/13 (69.23%) | 4/13 (30.77%) | |||
| >6 months | 15/23 (65.22%) | 8/23 (34.78%) | |||
| Moment of infection | |||||
| Intercept | 13.296 | 3.353 | <0.001 | ||
| Age | −10.988 | 2.645 | <0.001 | ||
| 1st trimester | 8/11 (72.73%) | 3/11 (27.27%) | −10.930 | 2.602 | <0.001 |
| 2nd trimester | 14/38 (36.84%) | 24/38 (63.16%) | |||
| 3rd trimester | 25/51 (49.02%) | 26/51 (50.98%) | |||
| Delivery | 15/16 (93.75%) | 1/16 (6.25%) | |||
| Association between time of infection and IgG positivity, excluding time of delivery | 0.429 | 2.335 | 0.854 | ||
| Severity of infection | |||||
| Intercept | −8.704 | 3.156 | <0.001 | ||
| Age | −6.552 | 1.452 | <0.001 | ||
| Asymptomatic | 25/32 (78.12%) | 7/32 (21.88%) | 9.747 | 3.114 | 0.002 |
| Mild infection | 28/68 (41.18%) | 40/68 (58.82%) | |||
| Moderate/severe pneumonia | 5/12 (62.5%) | 7/12 (58.3%) | |||
| Vaccination status | |||||
| Intercept | −1.091 | 1.745 | 0.532 | ||
| Age | −6.238 | 1.062 | <0.001 | ||
| Not vaccinated | 62/118 (52.54%) | 56/118 (47.46%) | 19.465 | 4.906 | <0.001 |
| Vaccinated | 1/15 (6.67%) | 14/15 (93.33%) | |||
Mixed-effects logistic regression was used.