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The Association of Intrapair Birth-Weight Differences With Internalizing and Externalizing Behavior Problems

机译：内部化和外化行为问题的内部内化和外化的内化和外部化的关联

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摘要

Problem behaviors are of increasing public health concern. Twin studies have revealed substantial genetic and environmental influences on children's behavior, and examining birth-weight difference could allow the identification of the specific contribution of multiple non-shared prenatal environmental factors. The Twins and Multiple Births Association Heritability Study, a UK, volunteer-based study, recruited mothers of twins aged 18 months to 5 years; 960 twins (480 pairs) were included in the analysis. Twins’ mothers answered questions relative to their pregnancy and their twins’ characteristics, and completed the Child Behavior Checklist (CBCL) 1?–5. The association between the absolute birth-weight difference and each CBCL scale's score difference was analyzed by means of multiple linear regressions. Expected mean CBCL score differences were calculated. In monozygotic (MZ) twins, statistically and clinically significant associations were found between intrapair birth-weight difference and difference in total problems, internalizing problems, and emotional reactiveness. No significant results were observed neither in dizygotic (DZ) twins when analyzed as a separate group nor in MZ and DZ twins combined. The results of the present study suggest that with increasing the absolute birth-weight difference, the intrapair difference in total problems, internalizing behaviors and emotionality increases, with smaller twins being at major risk for later behavior problems. Moreover, these results suggest a causal association between birth weight and behavior development.
机译：问题行为越来越多的公共卫生问题。双语研究揭示了对儿童行为的大量遗传和环境影响，并检查出生体重差可能识别多个非共用产前环境因素的具体贡献。双胞胎和多个诞生协会遗传性研究，英国，志愿者为本的研究，招募了18个月至5年的双胞胎母亲;分析中包含960双胞胎（480对）。双胞胎母亲回答了他们怀孕的问题及其双胞胎的特征，并完成了儿童行为清单（CBCL）1？-5。通过多元线性回归分析绝对的出生体重差和每个CBCL比分差之间的关联。预期的平均CBCL评分差异计算。在单一程度（MZ）双胞胎中，统计和临床上显着的关联在内部出生体重差和总问题的差异，内部化问题和情绪反应之间存在。当分析为单独的群体或MZ和DZ双胞胎中，既不观察到Dizygotic（DZ）双胞胎中没有显着的结果。本研究的结果表明，随着绝对的出生体重差异，少量问题，内化行为和情感性增加的内部差异，较小的双胞胎是后期行为问题的主要风险。此外，这些结果表明出生体重与行为发展之间的因果关系。

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