Publications by authors named "Dalsgaard S"

Background: More research is needed to understand psychopathology among parents of children with mental disorders in the years before and after the child is diagnosed. Here, we estimated the risk of mental disorders and psychotropic medication use in parents of children with versus without mental disorders and the temporal associations between child and parental psychopathology.

Methods: We conducted a population-based matched cohort study using Danish register data.

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  • Low perceived social support for mothers during pregnancy and early childhood is linked to increased anxiety and ADHD symptoms in their children at ages 3.5 and 8 years.
  • The study analyzed data from the Norwegian Mother, Father, and Child Cohort Study, which assessed maternal social support and used the Child Symptom Inventory-4 to evaluate children’s anxiety and ADHD symptoms.
  • Results showed that low maternal social support is a significant predictor of anxiety symptoms in children both at 3.5 and 8 years old, while also indicating a potential link to ADHD symptoms at 8 years.
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Impulsivity has been proposed to have an impact on glycemic dysregulation. However, it remains uncertain whether an unfavorable glycemic status could also contribute to an increase in impulsivity levels. This study aims to analyze associations of baseline and time-varying glycemic status with 3-year time-varying impulsivity in older adults at high risk of cardiovascular disease.

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Background: Psychiatric disorders and type 2 diabetes mellitus (T2DM) are heritable, polygenic, and often comorbid conditions, yet knowledge about their potential shared familial risk is lacking. We used family designs and T2DM polygenic risk score (T2DM-PRS) to investigate the genetic associations between psychiatric disorders and T2DM.

Methods: We linked 659 906 individuals born in Denmark 1990-2000 to their parents, grandparents, and aunts/uncles using population-based registers.

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Background: The age of onset (AOO), incidence and cumulative incidence of mental disorders are critical epidemiological measures, providing essential insights into the development and course of these disorders across the lifespan. This study aims to provide up-to-date estimates of the AOO, age-specific incidence, and cumulative incidence for a comprehensive range of mental disorders using data from Danish registers.

Methods: We conducted a follow-up study encompassing all Danish residents from January 1, 2004, to December 31, 2021, totaling 91,613,465 person-years.

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  • The study investigates the relationship between insulin resistance (IR)-related conditions, like type 2 diabetes and obesity, and neuropsychiatric disorders, highlighting the complexity of their co-occurrence as a public health issue.
  • Researchers used genome-wide association studies (GWASs) with a large sample size to analyze genetic correlations between these conditions, identifying various genomic regions with significant local correlations.
  • The findings suggest that these correlated regions are linked to important biological pathways, indicating potential targets for treatments and a need for an integrated approach to understanding and managing these interconnected health problems.
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  • * Results showed that impaired glucose metabolism and DM status correlated with higher tau biomarkers, but not with amyloid-β, suggesting a specific association with tau in certain population settings.
  • * These findings highlight the importance of understanding the relationship between DM and AD biomarkers, which could improve diagnostics and treatment for both conditions.
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Maternal anxiety and depression during pregnancy and early childhood have been associated with child anxiety and attention-deficit/hyperactivity disorder (ADHD). However, previous studies are limited by their short follow-up, few assessments of maternal symptoms, and by not including maternal and child ADHD. The present study aimed to fill these gaps by investigating whether maternal anxiety and depressive symptoms from pregnancy to child age 5 years increase the risk of child anxiety disorders at age 8 years.

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Objectives: To examine the cross-sectional association between baseline depressive symptoms and the presence of type 2 diabetes (T2D), and its association with glycated hemoglobin (HbA1c) and other metabolic variables, and the prospective association of depressive symptoms and HbA1c after 1 year of follow-up.

Methods: n = 6224 Mediterranean older adults with overweight/obesity and metabolic syndrome (48% females, mean age 64.9 ± 4.

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Attention deficit hyperactivity disorder (ADHD) is a complex disorder that manifests variability in long-term outcomes and clinical presentations. The genetic contributions to such heterogeneity are not well understood. Here we show several genetic links to clinical heterogeneity in ADHD in a case-only study of 14,084 diagnosed individuals.

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Background: Although often intended for long-term treatment, discontinuation of medication for ADHD is common. However, cross-national estimates of discontinuation are missing due to the absence of standardised measures. The aim of this study was to determine the rate of ADHD treatment discontinuation across the lifespan and to describe similarities and differences across countries to guide clinical practice.

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Introduction: Maternal inflammation during pregnancy may affect early neurodevelopment in offspring as suggested by preclinical and register data. However, clinical evidence for risk of aberrant neurodevelopment later in childhood is scarce. In the population-based COPSAC mother-child cohort, we investigated associations between maternal inflammation levels during pregnancy and the risk of a diagnosis of ADHD as well as the load of ADHD symptoms in the children at age 10.

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Purpose Of The Article: Cognitive training for Attention Deficit/Hyperactivity Disorder (ADHD) has shown promising, although mixed results. In post-hoc analyses, we evaluate effects of cognitive training using a novel composite cognition score as the outcome for children attending at least 16 sessions of training, dose-response of training and associations between symptoms and cognitive functioning.

Materials And Methods: Children (age 6-13) with ADHD were randomized to intervention ( = 26) or control ( = 34).

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Childhood anxiety and depressive symptoms may be influenced by symptoms of attention deficit/hyperactivity disorder (ADHD). We investigated whether parent- and teacher-reported anxiety, depressive and ADHD symptoms at age 3 years predicted anxiety disorders and/or depression in children with and without ADHD at age 8 years. This study is part of the longitudinal, population-based Norwegian Mother, Father and Child Cohort Study.

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Knowledge on psychiatric comorbidity in adult ADHD is essential for prevention, detection, and treatment of these conditions. This review (1) focuses on large studies (n > 10,000; surveys, claims data, population registries) to identify (a) overall, (b) sex- and (c) age-specific patterns of comorbidity of anxiety disorders (ADs), major depressive disorder (MDD), bipolar disorder (BD) and substance use disorders (SUDs) in adults with ADHD relative to adults without ADHD; and (2) describes methodological challenges relating to establishing comorbidity in ADHD in adults as well as priorities for future research. Meta-analyses (ADHD: n = 550,748; no ADHD n = 14,546,814) yielded pooled odds ratios of 5.

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Article Synopsis
  • ADHD is a common neurodevelopmental disorder with a strong genetic basis, as shown in a large study involving 38,691 individuals with the disorder compared to 186,843 controls.
  • Researchers found 27 significant genomic regions linked to ADHD, with many genes related to early brain development and certain brain cell types, suggesting a biological basis for the disorder.
  • The study also highlighted that many genetic factors influencing ADHD overlap with other psychiatric conditions and are correlated with cognitive challenges, particularly in areas like attention and reasoning.
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  • Clinical research indicates a significant overlap between neuropsychiatric disorders and insulin resistance-related conditions like obesity and type 2 diabetes, affecting cognitive function.
  • The review analyzed 18 studies from the UK Biobank, confirming that insulin resistance is associated with poorer cognitive performance, particularly in verbal and numerical reasoning and processing speed.
  • Possible mechanisms for these associations include changes in immune response, brain health and connectivity, and the presence of other health issues.
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  • ADHD and autism spectrum disorder (ASD) share significant genetic similarities, with researchers identifying seven shared genetic loci and five that differentiate the two conditions.
  • The differentiating loci show opposite genetic effects in ADHD and ASD and are linked to traits like educational achievement and brain volume, while shared genetics correlate with other psychiatric traits.
  • Individuals with both ADHD and ASD exhibit unique genetic patterns, suggesting that understanding these genetic influences can help clarify the biological underpinnings of each disorder and how they may impact cognitive and psychological traits differently.
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Objective: Attention deficit hyperactivity disorder (ADHD) is a multifactorial neurodevelopmental disorder, yet the interplay between ADHD polygenic risk scores (PRSs) and other risk factors remains relatively unexplored. The authors investigated associations, confounding, and interactions of ADHD PRS with birth-related, somatic, and psychosocial factors previously associated with ADHD.

Methods: Participants included a random general population sample (N=21,578) and individuals diagnosed with ADHD (N=13,697) from the genotyped Danish iPSYCH2012 case cohort, born between 1981 and 2005.

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  • Type 2 diabetes mellitus (T2DM) is linked to various psychiatric and neurological disorders, and this study aimed to explore these associations in a large cohort of Danish citizens, while considering the order of diagnosis between T2DM and brain disorders.
  • The research analyzed data from nearly 1.9 million individuals born between 1955 and 1984, revealing significant associations between T2DM and a range of disorders, especially eating disorders and schizophrenia in the psychiatric category, along with inflammatory brain diseases and epilepsy in the neurological category.
  • Most associations were found to exist regardless of whether T2DM was diagnosed before or after the brain disorders, indicating a possible shared underlying cause between T2DM and these conditions, particularly
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Background: Inhalation corticosteroids (ICS) are prescribed for treatment of asthma in approximately 3% of all children in Denmark. Despite limited evidence, case reports suggest that ICS-related behavioural adverse drug events (ADEs) may be frequent. In general, underreporting of ADEs to official databases is common, and little is known about doctor's clinical experiences with behavioural ADEs when prescribing ICS for children with asthma.

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  • The study analyzes the genetic basis of 11 major psychiatric disorders through different levels of investigation, including behavior and genetics.
  • Researchers found four main genetic factors—neurodevelopmental, compulsive, psychotic, and internalizing—that explain the shared genetic risk among these disorders and their associations with behavior.
  • The study highlights that despite strong genetic links between the disorders, there isn’t a single genetic risk factor that effectively represents all of them, indicating complexity in psychiatric genetics.
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Background: The quality of a child's attachment to its primary caregiver plays an important role for its long-term socioemotional development. While 'secure' attachment is associated with better outcomes, 'insecure' attachment is associated with a higher risk of externalizing and internalizing symptoms. Children referred to mental health services show much higher rates of insecure attachment than the general population, yet the parent-child relationship is rarely in treatment focus.

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