Table 2. Motor Behavior at 3 to 5 Months’ Postterm Age in the Rio de Janeiro Cohort (Excluding 2 Infants With Microcephaly) by Maternal Positive vs Negative Real-time RT-PCR Assays.
| Variable | Positive for ZIKV by RT-PCR Assay (n = 56) | Negative for ZIKV by RT-PCR Assay (n = 20) | P Value |
|---|---|---|---|
| Weeks of gestation at the time of infection, wk, No. (%) | |||
| ≤13 | 20 (35.7) | 2 (10.0) | .03a |
| 14-28 | 26 (46.4) | 16 (80.0) | |
| ≥29 | 10 (17.9) | 2 (10.0) | |
| Fidgety movements, No. (%) | |||
| Normal | 47 (83.9) | 17 (85.0) | .93a |
| Abnormal exaggerated | 2 (3.6) | 1 (5.0) | |
| Absent | 7 (12.5) | 2 (10.0) | |
| Motor Optimality Score | |||
| Median (IQR) [range] | 23 (18-26) [7-28] | 23 (21-26) [7-27] | .57b |
| Optimal range of 25-28, No. (%) | 16 (28.6) | 6 (30.0) | .90a |
| Reduced ≤24, No. (%) | 40 (71.4) | 14 (70.0) |
Abbreviations: IQR, interquartile range; RT-PCR, reverse transcriptase–polymerase chain reaction; ZIKV, Zika virus.
a
Pearson χ2 test or Fisher exact test.
b
Mann-Whitney test.