Table 2. Mortality risk by age group among singleton live births in the cohort-linked data, Brazil, 2015-2018.

Live births	Live births with CZS	Live births without CZS	HR for mortality (95% CI)
Neonatal mortality (up to 27 days)
Neonatal deaths	163	80,006	7.2 (6.2-8.4)
Deaths per 1,000 PY	696.5 (597.3 -812.0)	95.7 (95.0 - 96.3)
Post-neonatal mortality (28-364 days)
Post-neonatal deaths	163	32,175	17.4 (14.9-20.3)
Deaths per 1,000 PY	59.4 (51.0 - 69.3)	3.5 (3.5 - 3.6)
Infant mortality (up to 364 days)
Infant deaths	326	112,181	10.2 (9.1-11.3)
Deaths per 1,000 PY	109.2 (98.0 - 121.8)	11.3 (11.2 - 11.3)
Mortality after one year (12-36 months)
Deaths after 1 year	72	8,448	21.9 (17.3-27.6)
Deaths per 1,000 PY	15.7(12.4-19.7)	0.7 (0.7-0.8)
Total mortality (up to 36 months)
Total Deaths	398	120,629	11.3 (10.2-12.4)
Deaths per 1,000 PY	52.6 (47.6-58.0)	5.6 (5.6-5.7)

PY= person years

CZS = congenital Zika syndrome