Table 5.
Anti-spike IgG levels according to the timing of serology, the timing and severity of maternal infection, and the mother’s vaccination status.
| Anti-Spike IgG Levels (UI/mL) | Coefficient | Standard Error | p-Value | |
|---|---|---|---|---|
| Age of serology determination | ||||
| Intercept | 583.648 | 85.223 | <0.001 | |
| 0–3 months | 398 (IQR 85.2–1256) | −1.647 | 0.572 | 0.007 |
| 3–6 months | 30 (IQR 5.75–110) | |||
| >6 months | 61.5 (IQR 13.2–318) | |||
| Moment of infection | ||||
| Intercept | 483.655 | 142.098 | 0.001 | |
| Age | −1.670 | 0.578 | 0.006 | |
| 1st trimester | 112 (IQR 27.5–165) | 71.402 | 75.549 | 0.349 |
| 2nd trimester | 118 (IQR 24–568) | |||
| 3rd trimester | 364 (IQR 27.8–916) | |||
| Delivery | 103 (IQR 8–390) | |||
| Severity of infection | ||||
| Intercept | 480.341 | 122.987 | <0.001 | |
| Age | −1.723 | 0.582 | 0.005 | |
| Asymptomatic | 30 (IQR 6–236) | 132.497 | 94.716 | 0.168 |
| Mild infection | 160 (IQR 37–977) | |||
| Moderate/severe pneumonia | 355 (IQR 6.5–634.5) | |||
| Vaccination status | ||||
| Intercept | 826.424 | 116.801 | <0.001 | |
| Age | −3.255 | 0.754 | <0.001 | |
| Not vaccinated (94) | 147 (IQR 24.5–862) | 1075.828 | 221.386 | <0.001 |
| Vaccinated (15) | 1245 (IQR 182–10044) |
Mixed-effects linear regression was used. Random effects associated with the mother and the patient were used.