Table 2. Bivariate Association between Microcephaly and Subject Characteristic.
| Microcephaly, n (%) | p-value | Odds Ratio (95% CI) | ||
|---|---|---|---|---|
| Variable | No (n = 12) | Yes (n = 6) | ||
| Mother’s Age (year), Mean ± SD | 29 ± 5 | 26 ± 6 | 0.337 | 0.9 (0.7–1.1) |
| Gestational Age (week), Mean ± SD | 38 ± 1 | 38 ± 1 | 0.692 | 1.2 (0.5–2.6) |
| Gestational Age | 1.000 | |||
| Preterm (≤37 weeks) | 3 (25.0%) | 2 (33.3%) | 1.5 (0.2–12.8) | |
| Normal (38–42 weeks) | 9 (75.0%) | 4 (66.7%) | Reference | |
| Zika virus IgG | 0.083 | |||
| Present | 1 (8.3%) | 3 (50%) | 11.0 (0.8–147.9) | |
| Absent | 11 (91.7%) | 3 (50%) | Reference | |
| Zika virus IgM | 0.333 | |||
| Present | 0 (0%) | 1 (16.7%) | 6.8 (0.2–195.1) | |
| Absent | 12 (100%) | 5 (83.3%) | Reference | |
Column percentage. CI = confidence interval. SD = standard deviation.
Note: p-value was obtained by Fisher’s exact test for categorical variable or two sample t test for continuous variable. A correction of 0.5 was used to compute odds ratio in every cell that contains a zero.