Adverse family life events during pregnancy and ADHD symptoms in five-year-old offspring / Mina A. ROSENQVIST in Journal of Child Psychology and Psychiatry, 60-6 (June 2019)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 60-6 (June 2019) . - p.665-675 Titre : Adverse family life events during pregnancy and ADHD symptoms in five-year-old offspring Type de document : texte imprimé Auteurs : Mina A. ROSENQVIST, Auteur ; A. SJOLANDER, Auteur ; Eivind YSTRØM, Auteur ; Henrik LARSSON, Auteur ; Ted REICHBORN-KJENNERUD, Auteur Article en page(s) : p.665-675 Langues : Anglais (eng) Mots-clés : Adhd  MoBa  adverse life events  antenatal stress  delayed effects  prenatal exposures  the Norwegian Mother and Child Cohort Study Index. décimale : PER Périodiques Résumé : BACKGROUND: Prenatal exposure to maternal adverse life events has been associated with offspring ADHD, but the role of familial confounding is unclear. We aimed to clarify if adverse life events during pregnancy are related to ADHD symptoms in offspring, taking shared familial factors into account. METHOD: Data were collected on 34,751 children (including 6,427 siblings) participating in the population-based Norwegian Mother and Child Cohort Study. During pregnancy, mothers reported whether they had experienced specific life events. We assessed ADHD symptoms in five-year-old children with the Conners' Parent Rating Scale-Revised: short form. We modeled the associations between life events and mean ADHD scores with ordinary linear regression in the full cohort, and with fixed-effect linear regression in sibling comparisons to adjust for familial confounding. RESULTS: Children exposed to adverse life events had higher ADHD scores at age 5, with the strongest effect observed for financial problems (mean differences 0.10 [95% CI: 0.09, 0.11] in adjusted model), and the weakest for having lost someone close (0.02 [95% CI 0.01, 0.04] in adjusted model). Comparing exposure-discordant siblings resulted in attenuated estimates that were no longer statistically significant (e.g. mean difference for financial problems -0.03 [95% CI -0.07, 0.02]). ADHD scores increased if the mother had experienced the event as painful or difficult, and with the number of events, whereas sibling-comparison analyses resulted in estimates attenuated toward the null. CONCLUSIONS: These results suggest that the association between adverse life events during pregnancy and offspring ADHD symptoms is largely explained by familial factors. En ligne : http://dx.doi.org/10.1111/jcpp.12990 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=397 [article] Adverse family life events during pregnancy and ADHD symptoms in five-year-old offspring [texte imprimé] / Mina A. ROSENQVIST, Auteur ; A. SJOLANDER, Auteur ; Eivind YSTRØM, Auteur ; Henrik LARSSON, Auteur ; Ted REICHBORN-KJENNERUD, Auteur . - p.665-675. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 60-6 (June 2019) . - p.665-675 Mots-clés : Adhd  MoBa  adverse life events  antenatal stress  delayed effects  prenatal exposures  the Norwegian Mother and Child Cohort Study Index. décimale : PER Périodiques Résumé : BACKGROUND: Prenatal exposure to maternal adverse life events has been associated with offspring ADHD, but the role of familial confounding is unclear. We aimed to clarify if adverse life events during pregnancy are related to ADHD symptoms in offspring, taking shared familial factors into account. METHOD: Data were collected on 34,751 children (including 6,427 siblings) participating in the population-based Norwegian Mother and Child Cohort Study. During pregnancy, mothers reported whether they had experienced specific life events. We assessed ADHD symptoms in five-year-old children with the Conners' Parent Rating Scale-Revised: short form. We modeled the associations between life events and mean ADHD scores with ordinary linear regression in the full cohort, and with fixed-effect linear regression in sibling comparisons to adjust for familial confounding. RESULTS: Children exposed to adverse life events had higher ADHD scores at age 5, with the strongest effect observed for financial problems (mean differences 0.10 [95% CI: 0.09, 0.11] in adjusted model), and the weakest for having lost someone close (0.02 [95% CI 0.01, 0.04] in adjusted model). Comparing exposure-discordant siblings resulted in attenuated estimates that were no longer statistically significant (e.g. mean difference for financial problems -0.03 [95% CI -0.07, 0.02]). ADHD scores increased if the mother had experienced the event as painful or difficult, and with the number of events, whereas sibling-comparison analyses resulted in estimates attenuated toward the null. CONCLUSIONS: These results suggest that the association between adverse life events during pregnancy and offspring ADHD symptoms is largely explained by familial factors. En ligne : http://dx.doi.org/10.1111/jcpp.12990 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=397

Age effects on autism heritability and etiological stability of autistic traits / Agnieszka BUTWICKA ; Ebba DU RIETZ ; Aleksandra KANINA ; Mina A. ROSENQVIST ; Henrik LARSSON ; Paul LICHTENSTEIN ; Mark J. TAYLOR in Journal of Child Psychology and Psychiatry, 65-9 (September 2024)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 65-9 (September 2024) . - p.1135-1144 Titre : Age effects on autism heritability and etiological stability of autistic traits Type de document : texte imprimé Auteurs : Agnieszka BUTWICKA, Auteur ; Ebba DU RIETZ, Auteur ; Aleksandra KANINA, Auteur ; Mina A. ROSENQVIST, Auteur ; Henrik LARSSON, Auteur ; Paul LICHTENSTEIN, Auteur ; Mark J. TAYLOR, Auteur Article en page(s) : p.1135-1144 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Background Autism and autistic traits onset in childhood but persist into adulthood. Little is known about how genetic and environmental factors influence autism and autistic traits into adulthood. We aimed to determine age effects on the heritability of clinically diagnosed autism and the etiological stability of autistic traits from childhood to adulthood using twin methods. Methods From 23,849 twin pairs in the Swedish Twin Register born between 1959 and 2010, we identified 485 individuals (1.01%, 31.5% female) with a clinical autism diagnosis. We estimated and compared the relative contribution of genetic, shared, and nonshared environmental influences to autism in childhood and adulthood. We further used multivariate twin analysis with four measurement points among 1,348 twin pairs in the longitudinal Twin Study of Child and Adolescent Development to assess the phenotypic and etiological stability of autistic traits - measured with three scales from the Child Behavior Checklist - from childhood to adulthood. Results Autism heritability was comparable from childhood, (96% [95% CI, 76-99%]) to adulthood (87% [67-96%]). Autistic traits were moderately stable (phenotypic correlation = 0.35-0.61) from childhood to adulthood, and their heritability varied between 52 and 71%. We observed stable as well as newly emerging genetic influences on autistic traits from ages 8-9 to 19-20, and unique nonshared environmental influences at each age. Conclusions Genetic factors are important for autism and autistic traits in adulthood and separate genetic studies in adults are warranted. En ligne : https://doi.org/10.1111/jcpp.13949 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=534 [article] Age effects on autism heritability and etiological stability of autistic traits [texte imprimé] / Agnieszka BUTWICKA, Auteur ; Ebba DU RIETZ, Auteur ; Aleksandra KANINA, Auteur ; Mina A. ROSENQVIST, Auteur ; Henrik LARSSON, Auteur ; Paul LICHTENSTEIN, Auteur ; Mark J. TAYLOR, Auteur . - p.1135-1144. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 65-9 (September 2024) . - p.1135-1144 Index. décimale : PER Périodiques Résumé : Background Autism and autistic traits onset in childhood but persist into adulthood. Little is known about how genetic and environmental factors influence autism and autistic traits into adulthood. We aimed to determine age effects on the heritability of clinically diagnosed autism and the etiological stability of autistic traits from childhood to adulthood using twin methods. Methods From 23,849 twin pairs in the Swedish Twin Register born between 1959 and 2010, we identified 485 individuals (1.01%, 31.5% female) with a clinical autism diagnosis. We estimated and compared the relative contribution of genetic, shared, and nonshared environmental influences to autism in childhood and adulthood. We further used multivariate twin analysis with four measurement points among 1,348 twin pairs in the longitudinal Twin Study of Child and Adolescent Development to assess the phenotypic and etiological stability of autistic traits - measured with three scales from the Child Behavior Checklist - from childhood to adulthood. Results Autism heritability was comparable from childhood, (96% [95% CI, 76-99%]) to adulthood (87% [67-96%]). Autistic traits were moderately stable (phenotypic correlation = 0.35-0.61) from childhood to adulthood, and their heritability varied between 52 and 71%. We observed stable as well as newly emerging genetic influences on autistic traits from ages 8-9 to 19-20, and unique nonshared environmental influences at each age. Conclusions Genetic factors are important for autism and autistic traits in adulthood and separate genetic studies in adults are warranted. En ligne : https://doi.org/10.1111/jcpp.13949 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=534

Maternal infection requiring hospitalization during pregnancy and attention-deficit hyperactivity disorder in offspring: a quasi-experimental family-based study / Ylva GINSBERG in Journal of Child Psychology and Psychiatry, 60-2 (February 2019)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 60-2 (February 2019) . - p.160-168 Titre : Maternal infection requiring hospitalization during pregnancy and attention-deficit hyperactivity disorder in offspring: a quasi-experimental family-based study Type de document : texte imprimé Auteurs : Ylva GINSBERG, Auteur ; Brian M. D'ONOFRIO, Auteur ; Martin E. RICKERT, Auteur ; Quetzal A. CLASS, Auteur ; Mina A. ROSENQVIST, Auteur ; Catarina ALMQVIST, Auteur ; Paul LICHTENSTEIN, Auteur ; Henrik LARSSON, Auteur Article en page(s) : p.160-168 Langues : Anglais (eng) Mots-clés : Maternal infection during pregnancy  attention-deficit/hyperactivity disorder  cousin comparisons  familial confounding  quasi-experimental  sibling comparisons Index. décimale : PER Périodiques Résumé : BACKGROUND: Maternal infection during pregnancy (IDP) has been associated with increased risk of attention-deficit/hyperactivity disorder (ADHD) in offspring. However, infection is associated with social adversity, poor living conditions and other background familial factors. As such, there is a need to rule out whether the observed association between maternal IDP and ADHD might be attributed to such confounding. METHODS: This nationwide population-based cohort study using a family-based, quasi-experimental design included 1,066,956 individuals born in Sweden between 1992 and 2002. Data on maternal IDP (bacterial or viral) requiring hospitalization and ADHD diagnosis in offspring were gathered from Swedish National Registers, with individuals followed up through the end of 2009. Ordinary and stratified Cox regression models were used for estimation of hazard ratios (HRs) and several measured covariates were considered. Cousin- and sibling-comparisons accounted for unmeasured genetic and environmental factors shared by cousins and siblings. RESULTS: In the entire population, maternal IDP was associated with ADHD in offspring (HR = 2.31, 95% CI = 2.04-2.61). This association was attenuated when accounting for measured covariates (HR = 1.86, 95% CI = 1.65-2.10). The association was further attenuated when adjusting for unmeasured factors shared between cousins (HR = 1.52, 95% CI = 1.12-2.07). Finally, the association was fully attenuated in sibling comparisons (HR = 1.03, 95% CI = 0.76-1.41). CONCLUSIONS: This study suggests that the association between maternal IDP and offspring ADHD is largely due to unmeasured familial confounding. Our results underscore the importance of adjusting for unobserved familial risk factors when exploring risk factors for ADHD. En ligne : http://dx.doi.org/10.1111/jcpp.12959 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=381 [article] Maternal infection requiring hospitalization during pregnancy and attention-deficit hyperactivity disorder in offspring: a quasi-experimental family-based study [texte imprimé] / Ylva GINSBERG, Auteur ; Brian M. D'ONOFRIO, Auteur ; Martin E. RICKERT, Auteur ; Quetzal A. CLASS, Auteur ; Mina A. ROSENQVIST, Auteur ; Catarina ALMQVIST, Auteur ; Paul LICHTENSTEIN, Auteur ; Henrik LARSSON, Auteur . - p.160-168. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 60-2 (February 2019) . - p.160-168 Mots-clés : Maternal infection during pregnancy  attention-deficit/hyperactivity disorder  cousin comparisons  familial confounding  quasi-experimental  sibling comparisons Index. décimale : PER Périodiques Résumé : BACKGROUND: Maternal infection during pregnancy (IDP) has been associated with increased risk of attention-deficit/hyperactivity disorder (ADHD) in offspring. However, infection is associated with social adversity, poor living conditions and other background familial factors. As such, there is a need to rule out whether the observed association between maternal IDP and ADHD might be attributed to such confounding. METHODS: This nationwide population-based cohort study using a family-based, quasi-experimental design included 1,066,956 individuals born in Sweden between 1992 and 2002. Data on maternal IDP (bacterial or viral) requiring hospitalization and ADHD diagnosis in offspring were gathered from Swedish National Registers, with individuals followed up through the end of 2009. Ordinary and stratified Cox regression models were used for estimation of hazard ratios (HRs) and several measured covariates were considered. Cousin- and sibling-comparisons accounted for unmeasured genetic and environmental factors shared by cousins and siblings. RESULTS: In the entire population, maternal IDP was associated with ADHD in offspring (HR = 2.31, 95% CI = 2.04-2.61). This association was attenuated when accounting for measured covariates (HR = 1.86, 95% CI = 1.65-2.10). The association was further attenuated when adjusting for unmeasured factors shared between cousins (HR = 1.52, 95% CI = 1.12-2.07). Finally, the association was fully attenuated in sibling comparisons (HR = 1.03, 95% CI = 0.76-1.41). CONCLUSIONS: This study suggests that the association between maternal IDP and offspring ADHD is largely due to unmeasured familial confounding. Our results underscore the importance of adjusting for unobserved familial risk factors when exploring risk factors for ADHD. En ligne : http://dx.doi.org/10.1111/jcpp.12959 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=381

A twin study of genetic and environmental contributions to attention-deficit/hyperactivity disorder over time / Mark J. TAYLOR in Journal of Child Psychology and Psychiatry, 64-11 (November 2023)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 64-11 (November 2023) . - p.1608-1616 Titre : A twin study of genetic and environmental contributions to attention-deficit/hyperactivity disorder over time Type de document : texte imprimé Auteurs : Mark J. TAYLOR, Auteur ; Joanna MARTIN, Auteur ; Agnieszka BUTWICKA, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Sebastian LUNDSTROM, Auteur ; Henrik LARSSON, Auteur ; Mina A. ROSENQVIST, Auteur Article en page(s) : p.1608-1616 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) is an increasingly commonly diagnosed neurodevelopmental condition. One possibility is that this reflects a genuine increase in the prevalence of ADHD due to secular environmental changes, yet this hypothesis remains untested. We therefore investigated whether the genetic and environmental variance underlying ADHD, and traits of ADHD, has changed over time. Methods We identified twins born from 1982 to 2008 from the Swedish Twin Registry (STR). We linked the STR with the Swedish National Patient Register and Prescribed Drug Register to identify diagnoses of ADHD and prescriptions of ADHD medication for these twins. We also utilized data collected from participants in the Child and Adolescent Twin Study in Sweden (CATSS), born from 1992 to 2008. Their parents completed a structured ADHD screening tool, which was used to measure traits of ADHD and assign broad screening diagnoses of ADHD. We used the classical twin design to test whether the degree to which variation in these measures was influenced by genetic and environmental variation changed over time. Results We included 22,678 twin pairs from the STR and 15,036 pairs from CATSS. The heritability of ADHD in the STR ranged from 66% to 86% over time, although these fluctuations were not statistically significant. We observed a modest increase in variance in ADHD traits, from 0.98 to 1.09. This was driven by small increases in the underlying genetic and environmental variance, with heritability estimated as 64%-65%. No statistically significant changes in variance in screening diagnoses were observed. Conclusions The relative contribution of genetic and environmental factors to ADHD has remained stable over time, despite its increasing prevalence. Thus, changes in the underlying etiology of ADHD over time are unlikely to explain the increase in ADHD diagnoses. En ligne : https://doi.org/10.1111/jcpp.13854 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=512 [article] A twin study of genetic and environmental contributions to attention-deficit/hyperactivity disorder over time [texte imprimé] / Mark J. TAYLOR, Auteur ; Joanna MARTIN, Auteur ; Agnieszka BUTWICKA, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Sebastian LUNDSTROM, Auteur ; Henrik LARSSON, Auteur ; Mina A. ROSENQVIST, Auteur . - p.1608-1616. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 64-11 (November 2023) . - p.1608-1616 Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) is an increasingly commonly diagnosed neurodevelopmental condition. One possibility is that this reflects a genuine increase in the prevalence of ADHD due to secular environmental changes, yet this hypothesis remains untested. We therefore investigated whether the genetic and environmental variance underlying ADHD, and traits of ADHD, has changed over time. Methods We identified twins born from 1982 to 2008 from the Swedish Twin Registry (STR). We linked the STR with the Swedish National Patient Register and Prescribed Drug Register to identify diagnoses of ADHD and prescriptions of ADHD medication for these twins. We also utilized data collected from participants in the Child and Adolescent Twin Study in Sweden (CATSS), born from 1992 to 2008. Their parents completed a structured ADHD screening tool, which was used to measure traits of ADHD and assign broad screening diagnoses of ADHD. We used the classical twin design to test whether the degree to which variation in these measures was influenced by genetic and environmental variation changed over time. Results We included 22,678 twin pairs from the STR and 15,036 pairs from CATSS. The heritability of ADHD in the STR ranged from 66% to 86% over time, although these fluctuations were not statistically significant. We observed a modest increase in variance in ADHD traits, from 0.98 to 1.09. This was driven by small increases in the underlying genetic and environmental variance, with heritability estimated as 64%-65%. No statistically significant changes in variance in screening diagnoses were observed. Conclusions The relative contribution of genetic and environmental factors to ADHD has remained stable over time, despite its increasing prevalence. Thus, changes in the underlying etiology of ADHD over time are unlikely to explain the increase in ADHD diagnoses. En ligne : https://doi.org/10.1111/jcpp.13854 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=512

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