Karen Markussen Linnet

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OBJECTIVE The purpose of this review was to examine the literature assessing the relationship between prenatal exposure to nicotine, alcohol, caffeine, and psychosocial stress during pregnancy to the risk of developing behavioral problems related to attention deficit hyperactivity disorder (ADHD) in childhood. METHOD PubMed, MEDLINE, EMBASE, and PsycINFO(More)
AIMS To study the association between gestational age and birth weight and the risk of clinically verified hyperkinetic disorder. METHODS Nested case-control study of 834 cases and 20 100 controls with incidence density sampling. RESULTS Compared with children born at term, children born with gestational ages of 34-36 completed weeks had a 70% increased(More)
BACKGROUND Studies have consistently shown that pregnancy smoking is associated with twice the risk of hyperactivity/inattention problems in the offspring. An association of this magnitude may indicate behavioural difficulties as one of the most important health effects related to smoking during pregnancy. However, social and genetic confounders may fully(More)
OBJECTIVES We examine whether pregnancy weight (pre-pregnancy body mass index (BMI) and/or weight gain) is related to core symptoms of attention deficit hyperactivity disorder (ADHD) in school-age offspring. DESIGN Follow-up of prospective pregnancy cohorts from Sweden, Denmark and Finland within the Nordic Network on ADHD. METHODS Maternal pregnancy(More)
OBJECTIVE Maternal smoking during pregnancy may increase the risk for behavioral disorders. The aim of this study was to investigate the association between smoking during pregnancy and hyperkinetic and attention-deficit/hyperactivity disorder in the offspring in a large population-based study. METHODS This study was designed as a nested case-control(More)
BACKGROUND Prenatal exposure to smoking has been associated with Attention Deficit Hyperactivity Disorder (ADHD) in a number of epidemiological studies. However, mothers with the ADHD phenotype may 'treat' their problem by smoking and therefore be more likely to smoke even in a society where smoking is not acceptable. This will cause genetic confounding if(More)
BACKGROUND Attention Deficit/Hyperactivity Disorder (ADHD) affects many children, adolescents, and adults and is associated with a number of impairments. Poor academic performance is related to ADHD in clinical samples. However, it is unclear to what extent core ADHD symptoms and scholastic impairment are related in non-referred school-aged children. (More)
Objectives: Cognitive apprenticeship learning focuses on improving understanding and clinical diagnostic reasoning among learners. The aim of this study was to describe the feasibility of cognitive apprenticeship encounters in clinical paediatric settings in terms of time consumption; and to describe the encounters in terms of learner and teacher behavior.(More)
Mutations in SCN2A, a gene encoding the voltage-gated sodium channel Nav1.2, have been associated with a spectrum of epilepsies and neurodevelopmental disorders. Here, we report the phenotypes of 71 patients and review 130 previously reported patients. We found that (i) encephalopathies with infantile/childhood onset epilepsies (≥3 months of age) occur(More)