Table 2. Neonatal Outcomes According to Ultrasonographic Findings Among Women Diagnosed During Pregnancy With Zika Virus Infectiona.
| Neonatal Outcome | Prenatal Ultrasonographic Finding, No./Total No. (%) | P Valueb | |
|---|---|---|---|
| Normal (n = 55) | Abnormal (n = 36) | ||
| Gestational age at birth, median (IQR), wk | 38.7 (34.4-41.0) | 38.4 (32.7-42.0) | .06 |
| Preterm, <37 wk gestational age | 5 (9) | 7 (19) | .15 |
| Male sex | 29 (53) | 20 (56) | .79 |
| Cesarean delivery | 31/45 (69) | 24/31 (77) | .41 |
| Emergency cesarean delivery | 5/26 (19) | 6/16 (38) | .19 |
| Birth weight, mean (SD), g | 3175 (410) | 3154 (584) | .84 |
| Low birth weight, <2500 g | 4 (7) | 4 (11) | .71 |
| Macrosomia, >4000 g | 1 (2) | 2 (6) | .56 |
| Weight percentiles | |||
| Appropriate for gestational age | 45 (82) | 23 (64) | .05 |
| Small for gestational age | 4 (7) | 7 (19) | .11 |
| Large for gestational age | 6 (11) | 6 (17) | .43 |
| NICU admission | 7/54 (13) | 11/36 (31) | .04 |
| Preterm, 37 wk gestational age, (n = 12) | 3/5 (60) | 4/7 (57) | >.99 |
| Term, ≥37 wk gestational age, (n = 78) | 4/49 (8) | 7/29 (24) | .05 |
| NICU length of stay, median (IQR), d | 2.0 (2-10) | 6.5 (1-30) | .62 |
| Postnatal microcephaly | 0 | 6 (17) | .003 |
Abbreviations: IQR, interquartile range; NICU, neonatal intensive care unit.
a
Neonatal outcomes for all liveborn infants (n = 91). When data were missing, denominators are noted.
b
P values were 2-sided and calculated by the t test, Fisher exact, χ2, or Kruskal-Wallis test as appropriate. P values less than .05 were considered significant.