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  • Resultat 1-10 av 464
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1.
  • Sujan, Ayesha C., et al. (författare)
  • A Genetically Informed Study of the Associations Between Maternal Age at Childbearing and Adverse Perinatal Outcomes
  • 2016
  • Ingår i: Behavior Genetics. - New York, USA : Springer. - 0001-8244 .- 1573-3297. ; 46:3, s. 431-456
  • Tidskriftsartikel (refereegranskat)abstract
    • We examined associations of maternal age at childbearing (MAC) with gestational age and fetal growth (i.e., birth weight adjusting for gestational age), using two genetically informed designs (cousin and sibling comparisons) and data from two cohorts, a population-based Swedish sample and a nationally representative United States sample. We also conducted sensitivity analyses to test limitations of the designs. The findings were consistent across samples and suggested that, associations observed in the population between younger MAC and shorter gestational age were confounded by shared familial factors; however, associations of advanced MAC with shorter gestational age remained robust after accounting for shared familial factors. In contrast to the gestational age findings, neither early nor advanced MAC was associated with lower fetal growth after accounting for shared familial factors. Given certain assumptions, these findings provide support for a causal association between advanced MAC and shorter gestational age. The results also suggest that there are not causal associations between early MAC and shorter gestational age, between early MAC and lower fetal growth, and between advanced MAC and lower fetal growth.
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  • Wiggs, Kelsey K., et al. (författare)
  • A Family-Based Study of the Association Between Labor Induction and Offspring Attention-Deficit Hyperactivity Disorder and Low Academic Achievement
  • 2017
  • Ingår i: Behavior Genetics. - Stockholm : Springer. - 0001-8244 .- 1573-3297. ; 47:4, s. 383-393
  • Tidskriftsartikel (refereegranskat)abstract
    • The current study examined associations between labor induction and both (1) offspring attention-deficit hyperactivity disorder (ADHD) diagnosis in a Swedish birth cohort born 1992-2005 (n = 1,085,008) and (2) indices of offspring low academic achievement in a sub-cohort born 1992-1997 (n = 489,196). Associations were examined in the entire sample (i.e., related and unrelated individuals) with adjustment for measured covariates and, in order to account for unmeasured confounders shared within families, within differentially exposed cousins and siblings. We observed an association between labor induction and offspring ADHD diagnosis and low academic achievement in the population. However, these associations were fully attenuated after adjusting for measured covariates and unmeasured factors that cousins and siblings share. The results suggest that observed associations between labor induction and ADHD and low academic achievement may be due to genetic and/or shared environmental factors that influence both mothers' risk of labor induction and offspring neurodevelopment.
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  • Andersson, Anneli, 1992-, et al. (författare)
  • Genetic overlap between ADHD and externalizing, internalizing and neurodevelopmental disorder symptoms : a systematic review and meta-analysis
  • 2018
  • Ingår i: Behavior Genetics. - : Springer. - 0001-8244 .- 1573-3297. ; 48:6, s. 455-456
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder (Wilens, Biederman & Spencer 2002) and affects approximately 5% of children (Polanczyk, de Lima, Horta, Biederman & Rohde 2007). About half of those diagnosed in childhood continue to have the diagnosis and symptoms in adulthood (Kessler et al. 2006). The co-occurrence of ADHD with other psychiatric disorder symptoms (Burt et al. 2001; Cole et al. 2009; Polderman et al. 2014) has been suggested to be partly explained by a shared genetic vulnerability (Polderman et al. 2014). However, the strength of the genetic overlap is currently unclear. Also, no study has examined whether the genetic correlations differs between age groups (childhood versus adulthood), by rater (self-report, other informant, combined (parent-teacher, parent-twin, teacher-twin)), or by type of psychiatric disorder symptoms (externalizing, internalizing, neu-rodevelopmental). To address this gap, we conducted a systematic literature search to identify relevant twin studies, in PubMed, PsycINFO, and EMBASE. A total of 31 articles were identified and included in the present study. The pooled estimates showed that the comorbidity between ADHD and diverse psychiatric disorder symptoms were explained by shared genetic effectsrg= 0.50 (0.43–0.56). A similar shared genetic overlap between ADHD and psychiatric disorder symptoms was observed in both childhood rg= 0.51(0.42–0.61) and adulthood rg= 0.47 (0.40–0.53). Similar results werealso found for self-reports rg= 0.49 (0.42–0.55), other informants rg= 0.50 (0.40–0.60), and combined raters rg= 0.51 (0.30–0.69). Further, the strength of the genetic correlations of ADHD with the externalizing rg= 0.49 (0.39–0.59), internalizing rg= 0.55 (0.40–0.68) and neurodevelopmental rg= 0.47 (0.40–0.53) spectrums were similar in magnitude. These findings emphasize the presence of a shared genetic liability between ADHD and externalizing, internalizing and neurodevelopmental disorder symptoms, independent of age and rater.ReferencesBurt, S. A., Krueger, R. F., McGue, M., Iacono, W. G. (2001).Sources of covariation among attention-deficit/hyperactivity disorder,oppositional defiant disorder, and conduct disorder: the importance ofshared environment.Journal of Abnormal Psychology, 4, 516–525.Cole, J., Ball, H. A., Martin, N. C., Scourfield, J., McGuffin, P.(2009). Genetic overlap between measures of hyperactivity/inatten-tion and mood in children and adolescents.J Am Acad Child AdolescPsychiatry48, 1094–1101.Kessler, R. C., Adler, L., Barkley, R., Biederman, J., Conners, C.K., Demler, O., Faraone, S. V., Greenhill, L. L., Howes, M. J., Secnik,K., Spencer, T., Ustun, T. B., Walters, E. E., Zaslavsky, A. M. (2006).The prevalence and correlates of adult ADHD in the United States:results from the National Comorbidity Survey Replication.Am JPsychiatry, 163, 716–723.Polanczyk, G., de Lima, M. S., Horta, B. L., Biederman, J., Rohde,L. A. (2007). The worldwide prevalence of ADHD: a systematicreview and metaregression analysis.Am J Psychiatry, 164, 942-8.Polderman, T. J., Hoekstra, R. A., Posthuma, D., Larsson, H.(2014). The co-occurrence of autistic and ADHD dimensions inadults: an etiological study in 17,770 twins.Transl Psychiatry2014;4: e435.Wilens, T. E., Biederman, J., Spencer, T. J. (2002). Attentiondeficit/hyperactivity disorder across the lifespan.Annual Review Med53:113–131.
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