Validity of maternal report on birth weight 11 years after delivery: the 1993 Pelotas Birth Cohort Study, Rio Grande do Sul State, Brazil
Validity of maternal report on birth weight 11 years after delivery: the 1993 Pelotas Birth Cohort Study, Rio Grande do Sul State, Brazil
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DOI：
10.1590/s0102-311x2007001000017
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发表时间：
2007-10-01
期刊：
影响因子：
--
通讯作者：
Hallal, Pedro C.
中科院分区：
文献类型：
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作者：
Araújo, Cora L. P.;Dutra, Carmem L. C.;Hallal, Pedro C.
出生体重对健康有短期和长期的影响。一些研究使用了由受试者或父母报告的关于出生体重的回溯性数据。本文使用巴西南里奥格兰德州1993年Pelotas出生队列研究的数据，将研究小组在1993年测量的出生体重数据与母亲在2004-2005年报告的出生体重数据进行了比较。在探讨出生体重对特定结局的影响时，我们也评估了错误分类的作用。两个变量之间的平均差值为20g(SD=288.3)。总体样本中检测低出生体重的符合率为95.2%(kappa=0.73)，但在低学历母亲中的符合率较低。孩子出生时体重低于3500克的母亲倾向于高估孩子的出生体重。相反，体重较大的孩子的母亲往往低估了这些价值。每四位母亲中就有一位报告称，与1993年的测量结果相比，出生体重至少相差200克。与测量的出生体重相比，使用报告的出生体重淡化了11岁时与身体质量指数之间的关联程度。报告的出生体重应该非常谨慎地使用，如果有的话。
Birth weight has short and long-term effects on health. Some studies have used retrospective data on birth weight, reported by the subject or by the parents. This paper compares data on birth weight measured by the research team in 1993 with birth weight reported by the mother in 2004-2005, using data from the 1993 Pelotas Birth Cohort Study, Rio Grande do Sul State, Brazil. We also evaluate the role of misclassification when exploring the effect of birth weight on a given outcome. Mean difference between the two variables was 20g (SD = 288.3). Agreement for detecting low birth weight was 95.2% in the sample as a whole (kappa = 0.73), but was lower among low-schooling mothers. Mothers of children weighing less than 3,500g at birth tended to overestimate the child's birth weight. Inversely, mothers of heavier children tended to underestimate the values. One out of four mothers reported a difference of at least 200g in birth weight as compared to that measured in 1993. Use of reported birth weight diluted the magnitude of the association with body mass index at 11 years in comparison with measured birth weight. Reported birth weight should be used with great caution, if at all.