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Article: Three estimates of the association between linear growth failure and cognitive ability

TitleThree estimates of the association between linear growth failure and cognitive ability
Authors
KeywordsBody height
Child development
Cognition
Statistical models
Stunting
Issue Date2009
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/TMI
Citation
Tropical Medicine And International Health, 2009, v. 14 n. 9, p. 1020-1024 How to Cite?
AbstractObjectives To compare three estimators of association between growth stunting as measured by height-for-age Z-score and cognitive ability in children, and to examine the extent statistical adjustment for covariates is useful for removing confounding due to socio-economic status. Methods Three estimators, namely random-effects, within- and between-cluster estimators, for panel data were used to estimate the association in a survey of 1105 pairs of siblings who were assessed for anthropometry and cognition. Furthermore, a 'combined' model was formulated to simultaneously provide the within- and between-cluster estimates. Results Random-effects and between-cluster estimators showed strong association between linear growth and cognitive ability, even after adjustment for a range of socio-economic variables. In contrast, the within-cluster estimator showed a much more modest association: For every increase of one Z-score in linear growth, cognitive ability increased by about 0.08 standard deviation (P < 0.001). The combined model verified that the between-cluster estimate was significantly larger than the within-cluster estimate (P = 0.004). Conclusion Residual confounding by socio-economic situations may explain a substantial proportion of the observed association between linear growth and cognition in studies that attempt to control the confounding by means of multivariable regression analysis. The within-cluster estimator provides more convincing and modest results about the strength of association. © 2009 Blackwell Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/82931
ISSN
2015 Impact Factor: 2.519
2015 SCImago Journal Rankings: 1.497
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorCheung, YBen_HK
dc.contributor.authorLam, KFen_HK
dc.date.accessioned2010-09-06T08:35:01Z-
dc.date.available2010-09-06T08:35:01Z-
dc.date.issued2009en_HK
dc.identifier.citationTropical Medicine And International Health, 2009, v. 14 n. 9, p. 1020-1024en_HK
dc.identifier.issn1360-2276en_HK
dc.identifier.urihttp://hdl.handle.net/10722/82931-
dc.description.abstractObjectives To compare three estimators of association between growth stunting as measured by height-for-age Z-score and cognitive ability in children, and to examine the extent statistical adjustment for covariates is useful for removing confounding due to socio-economic status. Methods Three estimators, namely random-effects, within- and between-cluster estimators, for panel data were used to estimate the association in a survey of 1105 pairs of siblings who were assessed for anthropometry and cognition. Furthermore, a 'combined' model was formulated to simultaneously provide the within- and between-cluster estimates. Results Random-effects and between-cluster estimators showed strong association between linear growth and cognitive ability, even after adjustment for a range of socio-economic variables. In contrast, the within-cluster estimator showed a much more modest association: For every increase of one Z-score in linear growth, cognitive ability increased by about 0.08 standard deviation (P < 0.001). The combined model verified that the between-cluster estimate was significantly larger than the within-cluster estimate (P = 0.004). Conclusion Residual confounding by socio-economic situations may explain a substantial proportion of the observed association between linear growth and cognition in studies that attempt to control the confounding by means of multivariable regression analysis. The within-cluster estimator provides more convincing and modest results about the strength of association. © 2009 Blackwell Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/TMIen_HK
dc.relation.ispartofTropical Medicine and International Healthen_HK
dc.rightsTropical Medicine and International Health. Copyright © Blackwell Publishing Ltd.en_HK
dc.subjectBody heighten_HK
dc.subjectChild developmenten_HK
dc.subjectCognitionen_HK
dc.subjectStatistical modelsen_HK
dc.subjectStuntingen_HK
dc.titleThree estimates of the association between linear growth failure and cognitive abilityen_HK
dc.typeArticleen_HK
dc.identifier.emailLam, KF: hrntlkf@hkucc.hku.hken_HK
dc.identifier.authorityLam, KF=rp00718en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-3156.2009.02321.xen_HK
dc.identifier.pmid19552644-
dc.identifier.scopuseid_2-s2.0-69249188303en_HK
dc.identifier.hkuros157335en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-69249188303&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume14en_HK
dc.identifier.issue9en_HK
dc.identifier.spage1020en_HK
dc.identifier.epage1024en_HK
dc.identifier.isiWOS:000269263800007-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridCheung, YB=7202111441en_HK
dc.identifier.scopusauthoridLam, KF=8948421200en_HK
dc.identifier.citeulike5656827-

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