Advancing paternal age and offspring violent offending: A sibling-comparison study / Ralf KUJA-HALKOLA in Development and Psychopathology, 24-3 (August 2012)  

Public ISBD [article]  inDevelopment and Psychopathology > 24-3 (August 2012) . - p.739-53 Titre : Advancing paternal age and offspring violent offending: A sibling-comparison study Type de document : Texte imprimé et/ou numérique Auteurs : Ralf KUJA-HALKOLA, Auteur ; Yudi PAWITAN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Niklas LANGSTROM, Auteur ; Paul LICHTENSTEIN, Auteur Année de publication : 2012 Article en page(s) : p.739-53 Langues : Anglais (eng) Index. décimale : PER Périodiques Résumé : Children born to older fathers are at higher risk to develop severe psychopathology (e.g., schizophrenia and bipolar disorder), possibly because of increased de novo mutations during spermatogenesis with older paternal age. Because severe psychopathology is correlated with antisocial behavior, we examined possible associations between advancing paternal age and offspring violent offending. Interlinked Swedish national registers provided information on fathers' age at childbirth and violent criminal convictions in all offspring born from 1958 to 1979 (N = 2,359,921). We used ever committing a violent crime and number of violent crimes as indices of violent offending. The data included information on multiple levels; we compared differentially exposed siblings in within-family analyses to rigorously test causal influences. In the entire population, advancing paternal age predicted offspring violent crime according to both indices. Congruent with a causal effect, this association remained for rates of violent crime in within-family analyses. However, in within-family analyses, we found no association with ever committing a violent crime, suggesting that factors shared by siblings (genes and environment) confounded this association. Life-course persistent criminality has been proposed to have a partly biological etiology; our results agree with a stronger biological effect (i.e., de novo mutations) on persistent violent offending. En ligne : http://dx.doi.org/10.1017/S095457941200034X Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=177 [article] Advancing paternal age and offspring violent offending: A sibling-comparison study [Texte imprimé et/ou numérique] / Ralf KUJA-HALKOLA, Auteur ; Yudi PAWITAN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Niklas LANGSTROM, Auteur ; Paul LICHTENSTEIN, Auteur . - 2012 . - p.739-53. Langues : Anglais (eng) in Development and Psychopathology > 24-3 (August 2012) . - p.739-53 Index. décimale : PER Périodiques Résumé : Children born to older fathers are at higher risk to develop severe psychopathology (e.g., schizophrenia and bipolar disorder), possibly because of increased de novo mutations during spermatogenesis with older paternal age. Because severe psychopathology is correlated with antisocial behavior, we examined possible associations between advancing paternal age and offspring violent offending. Interlinked Swedish national registers provided information on fathers' age at childbirth and violent criminal convictions in all offspring born from 1958 to 1979 (N = 2,359,921). We used ever committing a violent crime and number of violent crimes as indices of violent offending. The data included information on multiple levels; we compared differentially exposed siblings in within-family analyses to rigorously test causal influences. In the entire population, advancing paternal age predicted offspring violent crime according to both indices. Congruent with a causal effect, this association remained for rates of violent crime in within-family analyses. However, in within-family analyses, we found no association with ever committing a violent crime, suggesting that factors shared by siblings (genes and environment) confounded this association. Life-course persistent criminality has been proposed to have a partly biological etiology; our results agree with a stronger biological effect (i.e., de novo mutations) on persistent violent offending. En ligne : http://dx.doi.org/10.1017/S095457941200034X Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=177

Adverse clinical outcomes among youths with nonsuicidal self-injury and suicide attempts: a longitudinal cohort study / Johan BJUREBERG in Journal of Child Psychology and Psychiatry, 63-8 (August 2022)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 63-8 (August 2022) . - p.921-928 Titre : Adverse clinical outcomes among youths with nonsuicidal self-injury and suicide attempts: a longitudinal cohort study Type de document : Texte imprimé et/ou numérique Auteurs : Johan BJUREBERG, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Anna OHLIS, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Clara HELLNER, Auteur ; Martin CEDERLOF, Auteur Article en page(s) : p.921-928 Langues : Anglais (eng) Mots-clés : Adolescent  Cohort Studies  Humans  Longitudinal Studies  Risk Factors  Self-Injurious Behavior/epidemiology/psychology/therapy  Substance-Related Disorders/epidemiology/therapy  Suicidal Ideation  Suicide, Attempted/psychology  Self-injury  self-harm  suicidal behaviour Index. décimale : PER Périodiques Résumé : BACKGROUND: More knowledge about risks of clinical outcomes associated with nonsuicidal self-injury (NSSI) and suicide attempts (SAs) is needed to inform risk assessment and intervention. METHODS: Longitudinal cohort study based on 1,855 youths was clinically assessed for NSSI and SA, and followed up (from December, 2011 to December 2013) for the outcomes; diagnosed self-injury, alcohol/substance use disorder, and psychiatric inpatient care data derived from Swedish registers. Hazard ratios (HRs) and 95% confidence intervals (CIs) of the outcomes were estimated with Cox regressions, and additionally adjusted for the potential effect of sex and the number of clinical assessments. NSSI and SA were treated as time-varying covariates. RESULTS: Youths with NSSI had elevated risks of all outcomes, compared with youths without NSSI or SA; the HR was 2.3, 95% confidence interval [1.6, 3.4] for self-injury, 1.4 [0.9, 2.1] for alcohol/substance use disorder, and 1.3 [1.0, 1.7] for psychiatric inpatient care. Youths with SA displayed higher risks for the outcomes than the NSSI group; the HR was 5.5 [2.4, 12.6] for self-injury, 2.0 [0.9, 4.4] for alcohol/substance use disorder, and 2.6 [1.5, 4.5] for psychiatric inpatient care. Youths with both NSSI and SA showed similar risks as youths with SA; HR 4.1 [2.0, 8.3] for self-injury, 2.0 [1.1, 4.1] for alcohol/substance use disorder, but a higher risk of psychiatric inpatient care; HR 5.0 [3.1, 7.9]. All results remained virtually unchanged in the adjusted analyses. CONCLUSIONS: Youths with NSSI and/or SA had higher risks for subsequent adverse clinical outcomes. These excess risks were more pronounced among youths with SA and youths with both NSSI and SA, and the risk for psychiatric inpatient care was particularly high in youths with both NSSI and SA. Our findings suggest that early interventions for youths with NSSI or SA should not exclusively focus on suicide prevention, but also consider the risk of subsequent alcohol/substance use disorder. En ligne : http://dx.doi.org/10.1111/jcpp.13544 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=486 [article] Adverse clinical outcomes among youths with nonsuicidal self-injury and suicide attempts: a longitudinal cohort study [Texte imprimé et/ou numérique] / Johan BJUREBERG, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Anna OHLIS, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Clara HELLNER, Auteur ; Martin CEDERLOF, Auteur . - p.921-928. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 63-8 (August 2022) . - p.921-928 Mots-clés : Adolescent  Cohort Studies  Humans  Longitudinal Studies  Risk Factors  Self-Injurious Behavior/epidemiology/psychology/therapy  Substance-Related Disorders/epidemiology/therapy  Suicidal Ideation  Suicide, Attempted/psychology  Self-injury  self-harm  suicidal behaviour Index. décimale : PER Périodiques Résumé : BACKGROUND: More knowledge about risks of clinical outcomes associated with nonsuicidal self-injury (NSSI) and suicide attempts (SAs) is needed to inform risk assessment and intervention. METHODS: Longitudinal cohort study based on 1,855 youths was clinically assessed for NSSI and SA, and followed up (from December, 2011 to December 2013) for the outcomes; diagnosed self-injury, alcohol/substance use disorder, and psychiatric inpatient care data derived from Swedish registers. Hazard ratios (HRs) and 95% confidence intervals (CIs) of the outcomes were estimated with Cox regressions, and additionally adjusted for the potential effect of sex and the number of clinical assessments. NSSI and SA were treated as time-varying covariates. RESULTS: Youths with NSSI had elevated risks of all outcomes, compared with youths without NSSI or SA; the HR was 2.3, 95% confidence interval [1.6, 3.4] for self-injury, 1.4 [0.9, 2.1] for alcohol/substance use disorder, and 1.3 [1.0, 1.7] for psychiatric inpatient care. Youths with SA displayed higher risks for the outcomes than the NSSI group; the HR was 5.5 [2.4, 12.6] for self-injury, 2.0 [0.9, 4.4] for alcohol/substance use disorder, and 2.6 [1.5, 4.5] for psychiatric inpatient care. Youths with both NSSI and SA showed similar risks as youths with SA; HR 4.1 [2.0, 8.3] for self-injury, 2.0 [1.1, 4.1] for alcohol/substance use disorder, but a higher risk of psychiatric inpatient care; HR 5.0 [3.1, 7.9]. All results remained virtually unchanged in the adjusted analyses. CONCLUSIONS: Youths with NSSI and/or SA had higher risks for subsequent adverse clinical outcomes. These excess risks were more pronounced among youths with SA and youths with both NSSI and SA, and the risk for psychiatric inpatient care was particularly high in youths with both NSSI and SA. Our findings suggest that early interventions for youths with NSSI or SA should not exclusively focus on suicide prevention, but also consider the risk of subsequent alcohol/substance use disorder. En ligne : http://dx.doi.org/10.1111/jcpp.13544 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=486

Codevelopment of ADHD and externalizing behavior from childhood to adulthood / Ralf KUJA-HALKOLA in Journal of Child Psychology and Psychiatry, 56-6 (June 2015)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 56-6 (June 2015) . - p.640-647 Titre : Codevelopment of ADHD and externalizing behavior from childhood to adulthood Type de document : Texte imprimé et/ou numérique Auteurs : Ralf KUJA-HALKOLA, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Henrik LARSSON, Auteur Article en page(s) : p.640-647 Langues : Anglais (eng) Mots-clés : ADHD  antisocial behavior  longitudinal studies  comorbidity  genetics  behavioral Index. décimale : PER Périodiques Résumé : Background Attention-Deficit/Hyperactivity Disorder (ADHD) frequently co-occurs with externalizing disorders, but a clear understanding of the etiologic underpinnings is hampered by the limited understanding of the codevelopment of the traits from childhood into early adulthood. Methods Using a birth cohort of 2600 twins, the Swedish Twin study of Child and Adolescent Development study, assessed at ages 8–9, 13–14, 16–17, and 19–20, we investigated the codevelopment of ADHD and externalizing behavior from childhood to adulthood. The analyses examined ADHD-like and externalizing traits, as rated by twins and their parents using the Attention Problems scale and Externalizing scale of the Child Behavior Checklist, and estimated cross-lagged effects (one trait at one time-point predicting the other at the next). The covariation between the traits were decomposed into stable (effects carried over from the prior time-points) and innovative (new effects for each time-point) sources; each source was further decomposed into additive genetics, shared and nonshared environment. Results The analysis suggested that externalizing traits in middle childhood (age 8–9) predicted ADHD-like traits in early adolescence (age 13–14), whereas the reverse association was nonsignificant. In contrast, ADHD-like traits in lateadolescence (age 16–17) predicted externalizing traits in early adulthood (age 19–20). The correlation between ADHD-like and externalizing traits increased over time. At all time-points, innovative sources contributed substantially to maintained comorbidity. Genetic effects explained 67% of the covariation at each time-point; importantly, nearly 50% of these effects were innovative. Conclusions This study challenges the belief that ADHD generally precedes externalizing behaviors; rather, change in the etiologic factors across the development is the rule. The effects were due to both new genetic and environmental factors emerging up to young adulthood. Clinicians and researchers needs to consider complex etiologic and developmental models for the comorbidity between ADHD and externalizing behaviors. En ligne : http://dx.doi.org/10.1111/jcpp.12340 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260 [article] Codevelopment of ADHD and externalizing behavior from childhood to adulthood [Texte imprimé et/ou numérique] / Ralf KUJA-HALKOLA, Auteur ; Paul LICHTENSTEIN, Auteur ; Brian M. D'ONOFRIO, Auteur ; Henrik LARSSON, Auteur . - p.640-647. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 56-6 (June 2015) . - p.640-647 Mots-clés : ADHD  antisocial behavior  longitudinal studies  comorbidity  genetics  behavioral Index. décimale : PER Périodiques Résumé : Background Attention-Deficit/Hyperactivity Disorder (ADHD) frequently co-occurs with externalizing disorders, but a clear understanding of the etiologic underpinnings is hampered by the limited understanding of the codevelopment of the traits from childhood into early adulthood. Methods Using a birth cohort of 2600 twins, the Swedish Twin study of Child and Adolescent Development study, assessed at ages 8–9, 13–14, 16–17, and 19–20, we investigated the codevelopment of ADHD and externalizing behavior from childhood to adulthood. The analyses examined ADHD-like and externalizing traits, as rated by twins and their parents using the Attention Problems scale and Externalizing scale of the Child Behavior Checklist, and estimated cross-lagged effects (one trait at one time-point predicting the other at the next). The covariation between the traits were decomposed into stable (effects carried over from the prior time-points) and innovative (new effects for each time-point) sources; each source was further decomposed into additive genetics, shared and nonshared environment. Results The analysis suggested that externalizing traits in middle childhood (age 8–9) predicted ADHD-like traits in early adolescence (age 13–14), whereas the reverse association was nonsignificant. In contrast, ADHD-like traits in lateadolescence (age 16–17) predicted externalizing traits in early adulthood (age 19–20). The correlation between ADHD-like and externalizing traits increased over time. At all time-points, innovative sources contributed substantially to maintained comorbidity. Genetic effects explained 67% of the covariation at each time-point; importantly, nearly 50% of these effects were innovative. Conclusions This study challenges the belief that ADHD generally precedes externalizing behaviors; rather, change in the etiologic factors across the development is the rule. The effects were due to both new genetic and environmental factors emerging up to young adulthood. Clinicians and researchers needs to consider complex etiologic and developmental models for the comorbidity between ADHD and externalizing behaviors. En ligne : http://dx.doi.org/10.1111/jcpp.12340 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=260

Familial aggregation of attention-deficit/hyperactivity disorder / Qi CHEN in Journal of Child Psychology and Psychiatry, 58-3 (March 2017)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 58-3 (March 2017) . - p.231-239 Titre : Familial aggregation of attention-deficit/hyperactivity disorder Type de document : Texte imprimé et/ou numérique Auteurs : Qi CHEN, Auteur ; Isabell BRIKELL, Auteur ; Paul LICHTENSTEIN, Auteur ; Eva SERLACHIUS, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Sven SANDIN, Auteur ; Henrik LARSSON, Auteur Article en page(s) : p.231-239 Langues : Anglais (eng) Mots-clés : Attention-deficit/hyperactivity disorder  diagnosis  family factor  sex differences  adulthood Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) aggregates in families. To date, the strength, pattern, and characteristics of the familial aggregation have not been thoroughly assessed in a population-based family sample. Methods In this cohort study, we identified relative pairs of twins, full and half-siblings, and full and half cousins from 1,656,943 unique individuals born in Sweden between 1985 and 2006. The relatives of index persons were followed from their third birthday to 31 December 2009 for ADHD diagnosis. Birth year adjusted hazard ratio (HR), that is, the rate of ADHD in relatives of ADHD-affected index persons compared with the rate of ADHD in relatives of unaffected index persons, was estimated in the different types of relatives using Cox proportional hazards model. Results During the follow-up, 31,865 individuals were diagnosed with ADHD (male to female ratio was 3.7). The birth year adjusted HRs were as follows: 70.45 for monozygotic twins; 8.44 for dizygotic twins; 8.27 for full siblings; 2.86 for maternal half-siblings; 2.31 for paternal half-siblings; 2.24 for full cousins; 1.47 for half cousins. Maternal half-siblings had significantly higher HR than in paternal half-siblings. The HR did not seem to be affected by index person's sex. Full siblings of index persons with ADHD diagnosis present at age 18 or older had a higher rate of ADHD (HR: 11.49) than full siblings of index persons with ADHD diagnosis only before age 18 (HR: 4.68). Conclusions Familial aggregation of ADHD increases with increasing genetic relatedness. The familial aggregation is driven by not only genetic factors but also a small amount of shared environmental factors. Persistence of ADHD into adulthood indexes stronger familial aggregation of ADHD. En ligne : http://dx.doi.org/10.1111/jcpp.12616 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=303 [article] Familial aggregation of attention-deficit/hyperactivity disorder [Texte imprimé et/ou numérique] / Qi CHEN, Auteur ; Isabell BRIKELL, Auteur ; Paul LICHTENSTEIN, Auteur ; Eva SERLACHIUS, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Sven SANDIN, Auteur ; Henrik LARSSON, Auteur . - p.231-239. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 58-3 (March 2017) . - p.231-239 Mots-clés : Attention-deficit/hyperactivity disorder  diagnosis  family factor  sex differences  adulthood Index. décimale : PER Périodiques Résumé : Background Attention-deficit/hyperactivity disorder (ADHD) aggregates in families. To date, the strength, pattern, and characteristics of the familial aggregation have not been thoroughly assessed in a population-based family sample. Methods In this cohort study, we identified relative pairs of twins, full and half-siblings, and full and half cousins from 1,656,943 unique individuals born in Sweden between 1985 and 2006. The relatives of index persons were followed from their third birthday to 31 December 2009 for ADHD diagnosis. Birth year adjusted hazard ratio (HR), that is, the rate of ADHD in relatives of ADHD-affected index persons compared with the rate of ADHD in relatives of unaffected index persons, was estimated in the different types of relatives using Cox proportional hazards model. Results During the follow-up, 31,865 individuals were diagnosed with ADHD (male to female ratio was 3.7). The birth year adjusted HRs were as follows: 70.45 for monozygotic twins; 8.44 for dizygotic twins; 8.27 for full siblings; 2.86 for maternal half-siblings; 2.31 for paternal half-siblings; 2.24 for full cousins; 1.47 for half cousins. Maternal half-siblings had significantly higher HR than in paternal half-siblings. The HR did not seem to be affected by index person's sex. Full siblings of index persons with ADHD diagnosis present at age 18 or older had a higher rate of ADHD (HR: 11.49) than full siblings of index persons with ADHD diagnosis only before age 18 (HR: 4.68). Conclusions Familial aggregation of ADHD increases with increasing genetic relatedness. The familial aggregation is driven by not only genetic factors but also a small amount of shared environmental factors. Persistence of ADHD into adulthood indexes stronger familial aggregation of ADHD. En ligne : http://dx.doi.org/10.1111/jcpp.12616 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=303

Familial risk and heritability of intellectual disability: a population-based cohort study in Sweden / Paul LICHTENSTEIN in Journal of Child Psychology and Psychiatry, 63-9 (September 2022)  

Public ISBD [article]  inJournal of Child Psychology and Psychiatry > 63-9 (September 2022) . - p.1092-1102 Titre : Familial risk and heritability of intellectual disability: a population-based cohort study in Sweden Type de document : Texte imprimé et/ou numérique Auteurs : Paul LICHTENSTEIN, Auteur ; Magnus TIDEMAN, Auteur ; Patrick F. SULLIVAN, Auteur ; Eva SERLACHIUS, Auteur ; Henrik LARSSON, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Agnieszka BUTWICKA, Auteur Article en page(s) : p.1092-1102 Langues : Anglais (eng) Mots-clés : Child  Cohort Studies  Genetic Predisposition to Disease  Humans  Intellectual Disability/epidemiology/genetics  Male  Registries  Risk Factors  Sweden/epidemiology  Intellectual disability  family factors  genetics  siblings  twins Index. décimale : PER Périodiques Résumé : BACKGROUND: Intellectual disability (ID) aggregates in families, but factors affecting individual risk and heritability estimates remain unknown. METHODS: A population-based family cohort study of 4,165,785 individuals born 1973-2013 in Sweden, including 37,787 ID individuals and their relatives. The relative risks (RR) of ID with 95% confidence intervals (95% CI) were obtained from stratified Cox proportional-hazards models. Relatives of ID individuals were compared to relatives of unaffected individuals. Structural equation modeling was used to estimate heritability. RESULTS: Relatives of ID individuals were at increased risk of ID compared to individuals with unaffected relatives. The RR of ID among relatives increased proportionally to the degree of genetic relatedness with ID probands; 256.70(95% CI 161.30-408.53) for monozygotic twins, 16.47(13.32-20.38) for parents, 14.88(12.19-18.16) for children, 7.04(4.67-10.61) for dizygotic twins, 8.38(7.97-8.83) for full siblings, 4.56(4.02-5.16) for maternal, 2.90(2.49-3.37) for paternal half-siblings, 3.03(2.61-3.50) for nephews/nieces, 2.84(2.45-3.29) for uncles/aunts, and 2.04(1.91-2.20) for cousins. Lower RRs were observed for siblings of probands with chromosomal abnormalities (RR 5.53, 4.74-6.46) and more severe ID (mild RR 9.15, 8.55-9.78, moderate RR 8.13, 7.28-9.08, severe RR 6.80, 5.74-8.07, and profound RR 5.88, 4.52-7.65). Male sex of relative and maternal line of relationship with proband was related to higher risk (RR 1.33, 1.25-1.41 for brothers vs. sisters and RR 1.49, 1.34-1.68 for maternal vs. paternal half-siblings). ID was substantially heritable with 0.95(95% CI 0.93-0.98) of the variance in liability attributed to genetic influences. CONCLUSIONS: The risk estimates will benefit researchers, clinicians, families in understanding the risk of ID in the family and the whole population. The higher risk of ID related to male sex and maternal linage will be of value for planning and interpreting etiological studies in ID. En ligne : http://dx.doi.org/10.1111/jcpp.13560 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=486 [article] Familial risk and heritability of intellectual disability: a population-based cohort study in Sweden [Texte imprimé et/ou numérique] / Paul LICHTENSTEIN, Auteur ; Magnus TIDEMAN, Auteur ; Patrick F. SULLIVAN, Auteur ; Eva SERLACHIUS, Auteur ; Henrik LARSSON, Auteur ; Ralf KUJA-HALKOLA, Auteur ; Agnieszka BUTWICKA, Auteur . - p.1092-1102. Langues : Anglais (eng) in Journal of Child Psychology and Psychiatry > 63-9 (September 2022) . - p.1092-1102 Mots-clés : Child  Cohort Studies  Genetic Predisposition to Disease  Humans  Intellectual Disability/epidemiology/genetics  Male  Registries  Risk Factors  Sweden/epidemiology  Intellectual disability  family factors  genetics  siblings  twins Index. décimale : PER Périodiques Résumé : BACKGROUND: Intellectual disability (ID) aggregates in families, but factors affecting individual risk and heritability estimates remain unknown. METHODS: A population-based family cohort study of 4,165,785 individuals born 1973-2013 in Sweden, including 37,787 ID individuals and their relatives. The relative risks (RR) of ID with 95% confidence intervals (95% CI) were obtained from stratified Cox proportional-hazards models. Relatives of ID individuals were compared to relatives of unaffected individuals. Structural equation modeling was used to estimate heritability. RESULTS: Relatives of ID individuals were at increased risk of ID compared to individuals with unaffected relatives. The RR of ID among relatives increased proportionally to the degree of genetic relatedness with ID probands; 256.70(95% CI 161.30-408.53) for monozygotic twins, 16.47(13.32-20.38) for parents, 14.88(12.19-18.16) for children, 7.04(4.67-10.61) for dizygotic twins, 8.38(7.97-8.83) for full siblings, 4.56(4.02-5.16) for maternal, 2.90(2.49-3.37) for paternal half-siblings, 3.03(2.61-3.50) for nephews/nieces, 2.84(2.45-3.29) for uncles/aunts, and 2.04(1.91-2.20) for cousins. Lower RRs were observed for siblings of probands with chromosomal abnormalities (RR 5.53, 4.74-6.46) and more severe ID (mild RR 9.15, 8.55-9.78, moderate RR 8.13, 7.28-9.08, severe RR 6.80, 5.74-8.07, and profound RR 5.88, 4.52-7.65). Male sex of relative and maternal line of relationship with proband was related to higher risk (RR 1.33, 1.25-1.41 for brothers vs. sisters and RR 1.49, 1.34-1.68 for maternal vs. paternal half-siblings). ID was substantially heritable with 0.95(95% CI 0.93-0.98) of the variance in liability attributed to genetic influences. CONCLUSIONS: The risk estimates will benefit researchers, clinicians, families in understanding the risk of ID in the family and the whole population. The higher risk of ID related to male sex and maternal linage will be of value for planning and interpreting etiological studies in ID. En ligne : http://dx.doi.org/10.1111/jcpp.13560 Permalink : https://www.cra-rhone-alpes.org/cid/opac_css/index.php?lvl=notice_display&id=486

Health, behavior, and social outcomes among offspring of parents with criminal convictions: a register-based study from Sweden / Aurora JÄRVINEN in Journal of Child Psychology and Psychiatry, 65-12 (December 2024)  

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Machine-Learning prediction of comorbid substance use disorders in ADHD youth using Swedish registry data / Yanli ZHANG-JAMES in Journal of Child Psychology and Psychiatry, 61-12 (December 2020)  

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Melatonin use and the risk of self-harm and unintentional injuries in youths with and without psychiatric disorders / Marica LEONE in Journal of Child Psychology and Psychiatry, 64-7 (July 2023)  

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Perceived child impairment and the 'autism epidemic' / Sebastian LUNDSTROM in Journal of Child Psychology and Psychiatry, 63-5 (May 2022)  

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Research Review: The strength of the genetic overlap between ADHD and other psychiatric symptoms - a systematic review and meta-analysis / Anneli ANDERSSON in Journal of Child Psychology and Psychiatry, 61-11 (November 2020)  

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Shared familial risk factors between attention-deficit/hyperactivity disorder and overweight/obesity – a population-based familial coaggregation study in Sweden / Qi CHEN in Journal of Child Psychology and Psychiatry, 58-6 (June 2017)  

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The role of general anesthesia on traits of neurodevelopmental disorders in a Swedish cohort of twins / Albert CASTELLHEIM in Journal of Child Psychology and Psychiatry, 59-9 (September 2018)  

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Trajectories of healthcare utilization and costs of psychiatric and somatic multimorbidity in adults with childhood ADHD: a prospective register-based study / Ebba DU RIETZ in Journal of Child Psychology and Psychiatry, 61-9 (September 2020)  

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Use of medication for attention-deficit/hyperactivity disorder and risk of unintentional injuries in children and adolescents with co-occurring neurodevelopmental disorders / Laura GHIRARDI in Journal of Child Psychology and Psychiatry, 61-2 (February 2020)  

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