Table 3.

Description of liveborn infants in the Jundiaí Zika cohort

Liveborn infants (n=712)
Twin pairs	3.5% (n=25)
Sex (female)	52.8% (n=376)
Delivery method
Vaginal	47.1 % (n = 330)
Caesarean section	50.3 % (n = 352)
Forceps	2.6 % (n = 18)
Unknown	1.7 % (n = 13)
Weight at birth in grams (mean and range)	3001 (590 – 4525)
Length at birth in cm (mean and range)	47.5 (28.5–58.5)
Head circumference at birth (mean and range)	33.7 (22–38.5)
Biological sample tested for ZIKV RT-PCR at<10 days	57.4% (n=409)
Positive urine ZIKV RT-PCR in first 10 days of life	4.6% (n=19)

Note: Percentages for all categories were calculated with exclusion of those with missing data from the denominator.

RT-PCR, reverse transcription polymerase chain reaction; ZIKV, Zika virus.