• Body mass index and childhood symptoms of depression, anxiety, and attention-deficit hyperactivity disorder: A within-family Mendelian randomization study 

      Hughes, Amanda M.; Sanderson, Eleanor; Morris, Tim; Ayorech, Ziada; Tesli, Martin Steen; Ask, Helga; Reichborn-Kjennerud, Ted; Andreassen, Ole; Magnus, Per Minor; Helgeland, Øyvind; Johansson, Stefan; Njølstad, Pål Rasmus; Davey Smith, George; Havdahl, Alexandra Karoline Saasen; Howe, Laura D.; Davies, Neil Martin (Peer reviewed; Journal article, 2022)
      Background: Higher BMI in childhood is associated with emotional and behavioural problems, but these associations may not be causal. Results of previous genetic studies imply causal effects but may reflect influence of ...
    • Characterization of the genetic architecture of infant and early childhood body mass index 

      Helgeland, Øyvind; Vaudel, Marc; Sole-Navais, Pol; Flatley, Christopher; Juodakis, Julius; Bacelis, Jonas; Koløen, Ingvild; Knudsen, Gun Peggy Strømstad; Johansson, Bente Berg; Magnus, Per Minor; Reichborn-Kjennerud, Ted; Juliusson, Pétur Benedikt; Stoltenberg, Camilla; Holmen, Oddgeir Lingaas; Andreassen, Ole; Jacobsson, Bo; Njølstad, Pål Rasmus; Johansson, Stefan (Peer reviewed; Journal article, 2022)
      Early childhood obesity is a growing global concern; however, the role of common genetic variation on infant and child weight development is unclear. Here, we identify 46 loci associated with early childhood body mass index ...
    • Cohort Profile: COVIDMENT: COVID-19 cohorts on mental health across six nations 

      Unnarsdóttir, Anna Bára; Lovik, Anikó; Fawns-Ritchie, Chloe; Ask, Helga; Kõiv, Kadri; Hagen, Kristen; Didriksen, Maria; Christoffersen, Lea Arregui Nordahl; Garðarsson, Alexander Berg; McIntosh, Andrew; Kähler, Anna K.; Campbell, Archie; Hauksdóttir, Arna; Erikstrup, Christian; Mikkelsen, Dorte Helenius; Altschul, Drew; Thordardottir, Edda Bjork; Frans, Emma Maria; Kvale, Gerd; Tómasson, Gunnar; Kariis, Hanna Maria; Jónsdóttir, Harpa Lind; Rúnarsdóttir, Harpa; Magnúsdóttir, Ingibjörg; Eid, Jarle; Jakobsdóttir, Jóhanna; Nielsen, Kaspar René; Kaspersen, Kathrine Agergård; Milani, Lili; Trogstad, Lill-Iren Schou; Yi, Lu; Bruun, Mie Topholm; Sullivan, Patrick F.; Magnus, Per Minor; Shen, Qing; Nesvåg, Ragnar; Brandlistuen, Ragnhild Eek; Mägi, Reedik; Ostrowski, Sisse Rye; Løkhammer, Solveig; Solem, Stian; Reichborn-Kjennerud, Ted; Hansen, Thomas Folkmann; Werge, Thomas; Aspelund, Thor; Porteous, David J.; Fang, Fang; Lehto, Kelli; Andreassen, Ole; Pedersen, Ole Birger Vesterager; Hellard, Stephanie Francoise Claire Le; Valdimarsdóttir, Unnur Anna (Journal article; Peer reviewed, 2021)
      Key features • COVIDMENT [www.covidment.is] is a NordForsk-funded research collaboration across six nations, with the overarching aim to significantly advance current knowledge on mental morbidity trajectories associated ...
    • Genetic nurture versus genetic transmission of risk for ADHD traits in the Norwegian Mother, Father and Child Cohort Study 

      Pingault, Jean-Baptiste; Barkhuizen, Wikus; Wang, Biyao; Hannigan, Laurie John; Eilertsen, Espen Moen; Corfield, Elizabeth Claire; Andreassen, Ole; Ask, Helga; Tesli, Martin Steen; Askeland, Ragna Bugge; Davey Smith, George; Stoltenberg, Camilla; Davies, Neil M.; Reichborn-Kjennerud, Ted; Ystrøm, Eivind; Havdahl, Alexandra (Peer reviewed; Journal article, 2022)
      Identifying mechanisms underlying the intergenerational transmission of risk for attention-deficit/hyperactivity disorder (ADHD) traits can inform interventions and provide insights into the role of parents in shaping their ...
    • Genomic Relationships, Novel Loci, and Pleiotropic Mechanisms across Eight Psychiatric Disorders. 

      Lee, Phil H.; Antilla, Verneri; Won, Hyejung; Bettella, Francesco; Agartz, Ingrid; Dale, Anders; Nærland, Terje; Elvsåshagen, Torbjørn; Ødegaard, Ketil Joachim; Melle, Ingrid; Knudsen, Gun Peggy Strømstad; Le Hellard, Stephanie; Reichborn-Kjennerud, Ted; Smeland, Olav Bjerkehagen; Andreassen, Ole Andreas; Neale, Benjamin M; Kendler, Kenneth S.; Smoller, Jordan W. (Peer reviewed; Journal article, 2019)
      Genetic influences on psychiatric disorders transcend diagnostic boundaries, suggesting substantial pleiotropy of contributing loci. However, the nature and mechanisms of these pleiotropic effects remain unclear. We performed ...
    • Maternal iodine intake and offspring attention-deficit/hyperactivity disorder: Results from a large prospective cohort study 

      Abel, Marianne Hope; Ystrøm, Eivind; Caspersen, Ida Henriette; Meltzer, Helle Margrete; Aase, Heidi; Torheim, Liv Elin; Askeland, Ragna Bugge; Reichborn-Kjennerud, Ted; Brantsæter, Anne Lise (Journal article; Peer reviewed, 2017)
      Current knowledge about the relationship between mild to moderately inadequate maternal iodine intake and/or supplemental iodine on child neurodevelopment is sparse. Using information from 77,164 mother-child pairs in the ...
    • Medication Use before, during, and after Pregnancy among Women with Eating Disorders: A Study from the Norwegian Mother and Child Cohort Study 

      Lupattelli, Angela; Spigset, Olav; Torgersen, Leila; Zerwas, Stephanie; Hatle, Marianne; Reichborn-Kjennerud, Ted; Bulik, Cynthia M.; Nordeng, Hedvig Marie Egeland (Journal article; Peer reviewed, 2015)
    • Sleep Duration and Nocturnal Awakenings in Infants Born with Gestational Risk 

      Hysing, Mari; Reichborn-Kjennerud, Ted; Markestad, Trond; Elgen, Irene Bircow; Sivertsen, Børge (Journal article; Peer reviewed, 2019)
      Objective: Infants born with gestation-related risks (low birth weight (LBW), small for gestational age (SGA), and prematurely born infants) are faced with a cascade of developmental issues. The aim of this study was to ...
    • Sleep problems and depressive symptoms in toddlers and 8-year-old children: A longitudinal study 

      Sivertsen, Børge; Harvey, Allison G.; Reichborn-Kjennerud, Ted; Ystrøm, Eivind; Hysing, Mari (Peer reviewed; Journal article, 2020)
      Sleep and depression are interlinked throughout the lifespan, but very few studies have examined the directionality of the sleep–depression link in children. The aim of the current study was to prospectively examine the ...
    • Tourette syndrome in children in Norway 

      Surén, Pål; Bakken, Inger Johanne; Skurtveit, Svetlana; Handal, Marte; Reichborn-Kjennerud, Ted; Stoltenberg, Camilla; Nøstvik, Liv Irene; Weidle, Bernhard (Journal article; Peer reviewed, 2019)
      BAKGRUNN Tourettes syndrom debuterer i barnealder og kjennetegnes av kroniske motoriske og vokale tics. I andre land er gjennomsnittsprevalensen beregnet til 0,77 % hos barn i alderen 6–15 år. I Norge er diagnosebruk og ...