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首页> 外文期刊>Cadernos de Saúde Pública >Accuracy of gestational age assessment in Brazilian Information System on Live Birth (SINASC): a population studyPrecisión en la determinación de la edad gestacional en el Sistema de Información sobre Nacidos Vivos (SINASC): un estudio de base poblacional
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Accuracy of gestational age assessment in Brazilian Information System on Live Birth (SINASC): a population studyPrecisión en la determinación de la edad gestacional en el Sistema de Información sobre Nacidos Vivos (SINASC): un estudio de base poblacional

机译：巴西活产信息系统（SINASC）中胎龄评估的准确性：一项人口研究确定活产信息系统（SINASC）中胎龄的精确度：一项基于人群的研究

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The prevalence of preterm births has shown a growing trend in many countries, including developed ones. Studies in Brazil have shown that the Information System on Live Births (SINASC, in Portuguese), until 2010, underestimated the prevalence of preterm births, when compared with studies based on primary data. Starting in 2011, gestational age at birth has been calculated in SINASC according to the last menstrual period (LMP), when available. This study sought to evaluate the accuracy of the gestational age assessment using LMP, compared with two other estimates, and correlate it with birth weight. This is a population study with data from SINASC available from Brazilian Health Informatics Department between 2011 and 2015. Definitions of preterm birth, low birth weight and birth asphyxia were taken from the literature. Adequacy of birth weigh to gestational age was calculated based on Fenton and Intergrowth-21 curves. We compared weight means according to the presence or lack of preterm birth. gestational age assessment was based on LMP in 58.5% and 41.5% used another method. We found that the preterm proportion was 12% in the LMP group and 8.4% in the other method group, while low birth weight was 6.5% and 8.4%, respectively. Mean weight of preterm infants was higher in the LMP group. Use of LMP as a gestational age estimator overestimated the proportion of weight equal to or higher than 2,500g among preterm infants, which does not seem compatible with the expected distribution for this group. LMP favored “correction” of prematurity for the parameters that are comparable to those of primary data studies, though the distortions we found between gestational age and birth weigh may indicate that there are still problems with this estimator.
机译：在包括发达国家在内的许多国家，早产的流行率已显示出上升的趋势。巴西的研究表明，与基于原始数据的研究相比，到2010年为止，活产信息系统（葡萄牙语的SINASC）低估了早产的发生率。从2011年开始，SINASC已根据最近的月经期（LMP）计算出生时的胎龄。这项研究试图评估使用LMP进行的胎龄评估的准确性，并与其他两个估计值进行比较，并将其与出生体重相关联。这是一项人口研究，使用了SINASC的数据，该数据可从2011年至2015年从巴西健康信息部获得。早产，低出生体重和出生窒息的定义来自文献。根据Fenton和Intergrowth-21曲线计算出生体重对胎龄的适当性。我们根据早产的存在与否比较了体重平均值。胎龄评估是基于LMP的，占58.5％，而使用另一种方法的占41.5％。我们发现，LMP组的早产比例为12％，其他方法组为8.4％，而低出生体重分别为6.5％和8.4％。 LMP组中早产婴儿的平均体重较高。使用LMP作为胎龄估算者，高估了早产儿体重等于或大于2500 g的比例，这似乎与该组的预期分布不符。尽管我们发现胎龄和出生体重之间的偏差可能表明该估计量仍然存在问题，但LMP赞成对与原始数据研究相当的参数进行过早“校正”。

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