Depressive symptoms, mental wellbeing, and substance use among adolescents before and during the COVID-19 pandemic in Iceland: a longitudinal, population-based studyIngibjörg Eva Þórisdóttir, Thorhildur Halldorsdottir, Bryndís Björk Ásgeirsdóttir et al.|The Lancet Psychiatry|2021Cited by 302
Adolescent well‐being amid the COVID‐19 pandemic: Are girls struggling more than boys?Thorhildur Halldorsdottir, Inga Dóra Sigfúsdóttir, Bryndís Björk Ásgeirsdóttir et al.|JCPP Advances|2021Cited by 113
Effect of the COVID-19 pandemic on adolescent mental health and substance use up to March, 2022, in Iceland: a repeated, cross-sectional, population-based studyIngibjörg Eva Þórisdóttir, Thorhildur Halldorsdottir, Gudjon Agustsson et al.|The Lancet Child & Adolescent Health|2023Cited by 56
Cumulative risk over the early life course and its relation to academic achievement in childhood and early adolescenceLaufey Dís Ragnarsdóttir, Inga Dóra Sigfúsdóttir, Álfgeir L. Kristjánsson et al.|Preventive Medicine|2016Cited by 29
A multi-level developmental approach towards understanding adolescent mental health and behaviour: rationale, design and methods of the LIFECOURSE study in IcelandThorhildur Halldorsdottir, Inga Dóra Sigfúsdóttir, Álfgeir L. Kristjánsson et al.|Social Psychiatry and Psychiatric Epidemiology|2020Cited by 7