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Table 2 Rates of preterm births by period in Chile

From: Sociodemographic characteristics of mother’s population and risk of preterm birth in Chile

Periods

1991-1995

1996-2000

2001-2008

 

N = 4 392 427

 
 

Rate %

95% CIa

(n)

Rate %

95% CI

(n)

Rate %

95% CI

(n)

P b

Preterm Birthsc

4.42

[4.38,4.45]

1 323 021

4.71

[4.67,4.75]

1 232 824

5.65

[5.62,5.69]

1 836 582

< 0.001

  1. Singletons Live Births, 1991–2008.
  2. a 95% Confidence interval.
  3. bPearson’s chi-square test between periods.
  4. cPreterm births in weeks of gestational age (WGA).
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Reproductive Health

ISSN: 1742-4755