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Gestational age at birth in weeks of live-born infants in the Jundiaí Zika Cohort March 2016 to August 2017, Jundiaí, São Paulo, Brazil.
| Gestational age (completed weeks) | ZIKV exposed (n = 44) | ZIKV unexposed (n = 513) | Crude RR (95% CI) |
|---|---|---|---|
| < 37 (preterm) | 4 (9.1%) | 68 (13.3%) | 0.7 (0.3–1.8) |
| 37–38 (early term) | 21 (47.7%) | 222 (43.4%) | 1.1 (0.8–1.5) |
| ≥ 39 (term and post-term) | 19 (43.2%) | 222 (43.4%) | 1.0 (0.7–1.4) |
| Missing | 0 | 1 (0.2%) |
