The effect of birthweight on childhood cognitive development in a middle-income country

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dc.contributor.authorTorche, Florencia
dc.contributor.authorEchevarria, Ghislaine
dc.date.accessioned2025-01-21T00:01:09Z
dc.date.available2025-01-21T00:01:09Z
dc.date.issued2011
dc.description.abstractMethods We merge birth registry information on birthweight with standardized Math and Spanish test scores for all fourth graders in Chile to create a prospective data set. Twin fixed-effects models are used to estimate the causal effect of intra-uterine growth on test scores. Fixed-effect estimates are compared with traditional regression results in a cross-section of births to gauge the omitted variable bias emerging from unobserved genetic, maternal and pregnancy-related factors in cross-sectional models.
dc.description.abstractResults Birthweight differences within twin pairs have a substantial effect on test scores. A 400-g increase in birthweight results in a 15% standard deviation increase in Math scores. The effect is larger among (estimated) monozygotic than dizygotic pairs, reaching > 20% standard deviation. The effect varies across family socioeconomic status. It is strong among disadvantaged families but it nearly disappears among advantaged ones.
dc.description.abstractConclusion Scarcity of uterine resources resulting in intra-uterine growth restriction has a detrimental effect on cognitive development in childhood. This effect interacts with family socioeconomic status (SES), so that low-SES families reinforce the effect of low birthweight and high-SES families fully compensate for it. Findings are particularly relevant in the developing world, where intra-uterine growth restriction is the main determinant of low birthweight.
dc.fuente.origenWOS
dc.identifier.doi10.1093/ije/dyr030
dc.identifier.eissn1464-3685
dc.identifier.issn0300-5771
dc.identifier.urihttps://doi.org/10.1093/ije/dyr030
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95375
dc.identifier.wosidWOS:000294108700028
dc.issue.numero4
dc.language.isoen
dc.pagina.final1018
dc.pagina.inicio1008
dc.revistaInternational journal of epidemiology
dc.rightsacceso restringido
dc.subjectBirthweight
dc.subjecttwin studies
dc.subjectzygosity
dc.subjectfixed-effects
dc.subjectcognitive development
dc.subjectdeveloping countries
dc.subject.ods05 Gender Equality
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa05 Igualdad de género
dc.subject.odspa03 Salud y bienestar
dc.titleThe effect of birthweight on childhood cognitive development in a middle-income country
dc.typeartículo
dc.volumen40
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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