Table 1.

Late-fetal-, perinatal-, neonatal- and infant-mortality rates in four birth cohorts, Pelotas, Brazil

	Birth cohorts (years)
	1982	1993	2004	2015	p
Number of births*	6011	5304	4272	4311	–
Number of live births	5914	5249	4231	4275	–
Late-fetal deaths*
Number	97	55	41	36	<0.001
Fetal-mortality ratea (1000 total births)	16.1	10.4	9.6	8.4
95% CI	13.0–19.3	7.6–13.1	6.7–12.5	5.6–11.0
Early-neonatal deaths					<0.001
Number	97	62	38	27
Early-neonatal-mortality rateb (1000 live births)	16.4	11.8	9.0	6.3
95% CI	13.0–19.5	8.9–14.7	6.2–11.8	3.9–8.7
Perinatal deaths (fetal* + early-neonatal)					–
Number	194	117	79	63	<0.001
Perinatal-mortality rate (1000 total births)	32.3	22.1	18.5	14.6
95% CI	27.7–36.5	18.1–26.0	14.5–22.5	11.0–18.2
Neonatal deaths					<0.001
Number	119	75	52	37
Neonatal-mortality rate (1000 live births)c	20.1	14.3	12.3	8.7
95% CI	16.5–23.7	11.1–17.5	9.0–15.6	5.8–11.4
Late-neonatal deaths					0.317
Number	22	13	14	10
Late-neonatal-mortality rate (1000 live births)d	3.7	2.5	3.3	2.3
95% CI	2.2–5.3	1.1–3.8	1.6–5.0	0.9–3.8
Infant deaths					<0.001
Number	215	111	82	59
Infant-mortality rate (1000 live births)e	36.4	21.1	19.4	13.8
95% CI	31.6–41.1	17.3–25.0	15.2–23.5	10.3–17.3

*Gestational age ≥28 weeks; CI, confidence interval; total number of births considering gestational age ≥20 weeks is 4287 (2004) and 4329 (2015).

^aTotal stillbirths/total births.

^bTotal deaths before 7 full days of life/total births.

^cDeaths occurred from the first day to 28 incomplete days after birth/total live births.

^dDeaths occurred after 7 full days and before 28 full days of life/total live births.

^eDeaths during the first year of life/total live births.

p-value: χ² for trend.