The Growing Trend of Moderate Preterm Births: An Ecological Study in One Region of Brazil.

Behavioral analysis of the different stages of prematurity—calculating the percentages in relation to all preterm births—showed a negative trend for extreme premature births (-0.43% per year) and very premature births (-0.15%), and a growing trend for moderately premature births (0.73% per year) ( Table 1 ).

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Premature births of children with congenital malformations showed an increasing trend (0.20% per year).

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Table 3 further shows a decreasing trend of preterm births for children with Apgar score below 7 at 5 minutes (-0.19% per year) and low birth weight (-1.43% per year).

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