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Familial confounding of the association between maternal smoking during pregnancy and ADHD in offspring / Charlotte SKOGLUND in Journal of Child Psychology and Psychiatry, 55-1 (January 2014)
[article]
Titre : Familial confounding of the association between maternal smoking during pregnancy and ADHD in offspring Type de document : Texte imprimé et/ou numérique Auteurs : Charlotte SKOGLUND, Auteur ; Qi CHEN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Paul LICHTENSTEIN, Auteur ; Henrik LARSSON, Auteur Article en page(s) : p.61-68 Langues : Anglais (eng) Mots-clés : Maternal smoking during pregnancy attention-deficit/hyperactivity disorder confounding sibling comparisons Index. décimale : PER Périodiques Résumé : Background Maternal Smoking During Pregnancy (SDP) has consistently been associated with increased risk of attention-deficit/hyperactivity disorder (ADHD) in offspring, but recent studies indicate that this association might be due to unmeasured familial confounding. Methods A total of 813,030 individuals born in Sweden between 1992 and 2000 were included in this nationwide population-based cohort study. Data on maternal SDP and ADHD diagnosis were obtained from national registers and patients were followed up from the age of 3 to the end of 2009. Hazard Ratios (HRs) were estimated using stratified Cox regression models. Cousin and sibling data were used to control for unmeasured familial confounding. Results At the population level maternal SDP predicted ADHD in offspring (HRModerateSDP = 1.89; HRHighSDP = 2.50). This estimate gradually attenuated toward the null when adjusting for measured confounders (HRModerateSDP = 1.62; HRHighSDP = 2.04), unmeasured confounders shared within the extended family (i.e., cousin comparison) (HRModerateSDP = 1.45; HRHighSDP = 1.69), and unmeasured confounders within the nuclear family (i.e., sibling comparison) (HRModerateSDP = 0.88; HRHighSDP = 0.84). Conclusions Our results suggest that the association between maternal SDP and offspring ADHD are due to unmeasured familial confounding. En ligne : http://dx.doi.org/10.1111/jcpp.12124 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220
in Journal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.61-68[article] Familial confounding of the association between maternal smoking during pregnancy and ADHD in offspring [Texte imprimé et/ou numérique] / Charlotte SKOGLUND, Auteur ; Qi CHEN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Paul LICHTENSTEIN, Auteur ; Henrik LARSSON, Auteur . - p.61-68.
Langues : Anglais (eng)
in Journal of Child Psychology and Psychiatry > 55-1 (January 2014) . - p.61-68
Mots-clés : Maternal smoking during pregnancy attention-deficit/hyperactivity disorder confounding sibling comparisons Index. décimale : PER Périodiques Résumé : Background Maternal Smoking During Pregnancy (SDP) has consistently been associated with increased risk of attention-deficit/hyperactivity disorder (ADHD) in offspring, but recent studies indicate that this association might be due to unmeasured familial confounding. Methods A total of 813,030 individuals born in Sweden between 1992 and 2000 were included in this nationwide population-based cohort study. Data on maternal SDP and ADHD diagnosis were obtained from national registers and patients were followed up from the age of 3 to the end of 2009. Hazard Ratios (HRs) were estimated using stratified Cox regression models. Cousin and sibling data were used to control for unmeasured familial confounding. Results At the population level maternal SDP predicted ADHD in offspring (HRModerateSDP = 1.89; HRHighSDP = 2.50). This estimate gradually attenuated toward the null when adjusting for measured confounders (HRModerateSDP = 1.62; HRHighSDP = 2.04), unmeasured confounders shared within the extended family (i.e., cousin comparison) (HRModerateSDP = 1.45; HRHighSDP = 1.69), and unmeasured confounders within the nuclear family (i.e., sibling comparison) (HRModerateSDP = 0.88; HRHighSDP = 0.84). Conclusions Our results suggest that the association between maternal SDP and offspring ADHD are due to unmeasured familial confounding. En ligne : http://dx.doi.org/10.1111/jcpp.12124 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=220 Familial confounding of the association between maternal smoking in pregnancy and autism spectrum disorder in offspring / Amy E. KALKBRENNER in Autism Research, 13-1 (January 2020)
[article]
Titre : Familial confounding of the association between maternal smoking in pregnancy and autism spectrum disorder in offspring Type de document : Texte imprimé et/ou numérique Auteurs : Amy E. KALKBRENNER, Auteur ; Sandra M. MEIER, Auteur ; Paul MADLEY-DOWD, Auteur ; Christine LADD-ACOSTA, Auteur ; Margaret Daniele FALLIN, Auteur ; Erik T. PARNER, Auteur ; Diana SCHENDEL, Auteur Article en page(s) : p.134-144 Langues : Anglais (eng) Mots-clés : attention deficit hyperactivity disorder autism autism spectrum disorder confounding family-based designs intellectual disability maternal smoking neurodevelopment tobacco Index. décimale : PER Périodiques Résumé : Evidence supports no link between maternal smoking in pregnancy and autism spectrum disorder (autism) overall. To address remaining questions about the unexplained heterogeneity between study results and the possibility of risk for specific autism sub-phenotypes, we conducted a whole-population cohort study in Denmark. We followed births 1991-2011 (1,294,906 persons, including 993,301 siblings in 728,271 families), from 1 year of age until an autism diagnosis (13,547), death, emigration, or December 31, 2012. Autism, with and without attention deficit hyperactivity disorder (ADHD) and with and without intellectual disability (ID) were based on ICD-8 and ICD-10 codes from Danish national health registers, including 3,319 autism + ADHD, 10,228 autism - no ADHD, 2,205 autism + ID, and 11,342 autism - no ID. We estimated hazard ratios (HRs) and 95% confidence intervals (95% CIs) between any maternal smoking (from birth records) and autism (or sub-phenotypes) using survival models with robust standard errors, stratifying by birth year and adjusting for child sex, parity, and parental age, education, income, and psychiatric history. To additionally address confounding using family designs, we constructed a maternal cluster model (adjusting for the smoking proportion within the family), and a stratified sibling model. Associations with maternal smoking and autism were elevated in conventional adjusted analyses (HR of 1.17 [1.13-1.22]) but attenuated in the maternal cluster (0.98 [0.88-1.09]) and sibling (0.86 [0.64-1.15]) models. Similarly, risks of autism sub-phenotypes with maternal smoking were attenuated in the family-based models. Together these results support that smoking in pregnancy is not linked with autism or select autism comorbid sub-phenotypes after accounting for familial confounding. Autism Res 2020, 13: 134-144. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Smoking during pregnancy has many harmful impacts, which may include harming the baby's developing brain. However, in a study of thousands of families in Denmark, it does not appear that smoking in pregnancy leads to autism or autism in combination with intellectual problems or attention deficits, once you account for the way smoking patterns and developmental disabilities run in families. En ligne : http://dx.doi.org/10.1002/aur.2196 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=415
in Autism Research > 13-1 (January 2020) . - p.134-144[article] Familial confounding of the association between maternal smoking in pregnancy and autism spectrum disorder in offspring [Texte imprimé et/ou numérique] / Amy E. KALKBRENNER, Auteur ; Sandra M. MEIER, Auteur ; Paul MADLEY-DOWD, Auteur ; Christine LADD-ACOSTA, Auteur ; Margaret Daniele FALLIN, Auteur ; Erik T. PARNER, Auteur ; Diana SCHENDEL, Auteur . - p.134-144.
Langues : Anglais (eng)
in Autism Research > 13-1 (January 2020) . - p.134-144
Mots-clés : attention deficit hyperactivity disorder autism autism spectrum disorder confounding family-based designs intellectual disability maternal smoking neurodevelopment tobacco Index. décimale : PER Périodiques Résumé : Evidence supports no link between maternal smoking in pregnancy and autism spectrum disorder (autism) overall. To address remaining questions about the unexplained heterogeneity between study results and the possibility of risk for specific autism sub-phenotypes, we conducted a whole-population cohort study in Denmark. We followed births 1991-2011 (1,294,906 persons, including 993,301 siblings in 728,271 families), from 1 year of age until an autism diagnosis (13,547), death, emigration, or December 31, 2012. Autism, with and without attention deficit hyperactivity disorder (ADHD) and with and without intellectual disability (ID) were based on ICD-8 and ICD-10 codes from Danish national health registers, including 3,319 autism + ADHD, 10,228 autism - no ADHD, 2,205 autism + ID, and 11,342 autism - no ID. We estimated hazard ratios (HRs) and 95% confidence intervals (95% CIs) between any maternal smoking (from birth records) and autism (or sub-phenotypes) using survival models with robust standard errors, stratifying by birth year and adjusting for child sex, parity, and parental age, education, income, and psychiatric history. To additionally address confounding using family designs, we constructed a maternal cluster model (adjusting for the smoking proportion within the family), and a stratified sibling model. Associations with maternal smoking and autism were elevated in conventional adjusted analyses (HR of 1.17 [1.13-1.22]) but attenuated in the maternal cluster (0.98 [0.88-1.09]) and sibling (0.86 [0.64-1.15]) models. Similarly, risks of autism sub-phenotypes with maternal smoking were attenuated in the family-based models. Together these results support that smoking in pregnancy is not linked with autism or select autism comorbid sub-phenotypes after accounting for familial confounding. Autism Res 2020, 13: 134-144. (c) 2019 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Smoking during pregnancy has many harmful impacts, which may include harming the baby's developing brain. However, in a study of thousands of families in Denmark, it does not appear that smoking in pregnancy leads to autism or autism in combination with intellectual problems or attention deficits, once you account for the way smoking patterns and developmental disabilities run in families. En ligne : http://dx.doi.org/10.1002/aur.2196 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=415