1. Adolescent well-being amid the COVID-19 pandemic: Are girls struggling more than boys? Halldorsdottir, Thorhildur; Thorisdottir, Ingibjorg E.; Meyers, Caine C. A.; Asgeirsdottir, Bryndis Bjork; Kristjansson, Alfgeir L.; Valdimarsdottir, Heiddis; Allegrante, John P.; Sigfusdottir, Inga Dora 2021 Articles COVID-19 (Disease)--Social aspectsAdolescenceTeenage girls--Mental healthSocial mediaDepression, Mental
2. Depressive symptoms, mental wellbeing, and substance use among adolescents before and during the COVID-19 pandemic in Iceland: a longitudinal, population-based study Thorisdottir, Ingibjorg E.; Asgeirsdottir, Bryndis Bjork; Kristjansson, Alfgeir L.; Valdimarsdottir, Heiddis; Jonsdottir Tolgyes, Erla Maria; Sigfusson, Jon; Allegrante, John P.; Sigfusdottir, Inga Dora; Halldorsdottir, Thorhildur 2021 Articles Teenagers--Substance useTeenagers--Mental healthCOVID-19 (Disease)--Social aspectsDepression, Mental
3. A multi-level developmental approach towards understanding adolescent mental health and behaviour: rationale, design and methods of the LIFECOURSE study in Iceland Halldorsdottir, Thorhildur; Kristjansson, Alfgeir L.; Asgeirsdottir, Bryndis Bjork; Thorisdottir, Ingibjorg E.; Sigfusson, Jon; Jonsdottir Tolgyes, Erla Maria; Valdimarsdottir, Heiddis; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Teenagers--Mental healthBehavioral assessment of teenagerResearch--MethodologyChild development--Research--Methodology
4. Cumulative risk over the early life course and its relation to academic achievement in childhood and early adolescence Ragnarsdottir, Laufey Dís; Kristjansson, Alfgeir L.; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Valdimarsdottir, Heiddis; Gestsdottir, Steinunn; Sigfusdottir, Inga Dora 2020 Articles Academic achievementChild developmentChildren--Family relationshipsChildren--Health and hygieneRisk
5. Development and Guiding Principles of the Icelandic Model for Preventing Adolescent Substance Use Kristjansson, Alfgeir L.; Mann, Michael J.; Sigfusson, Jon; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Substance abuse--PreventionYouth--Substance use--PreventionTeenagersHealth education
6. Implementación del Modelo Islandés para la Prevención del Uso del Sustancias en Adolescentes Kristjansson, Alfgeir L.; Mann, Michael J.; Sigfusson, Jon; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Substance abuse--PreventionYouth--Substance use--PreventionTeenagersHealth education
7. Implementing the Icelandic Model for Preventing Adolescent Substance Use Kristjansson, Alfgeir L.; Mann, Michael J.; Sigfusson, Jon; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Substance abuse--PreventionYouth--Substance use--PreventionTeenagersHealth education
8. Maternal smoking during pregnancy and academic achievement of offspring over time: A registry data-based cohort study Kristjansson, Alfgeir L.; Thomas, Sabena; Lilly, Christa L.; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Academic achievementChild developmentPrenatal influencesPregnant women--Tobacco useCohort analysis
9. Principios Directrices y Desarrollo del Modelo Islandés para la Prevención del Uso de Sustancias en Adolescentes Kristjansson, Alfgeir L.; Mann, Michael J.; Thorisdottir, Ingibjorg E.; Allegrante, John P.; Sigfusdottir, Inga Dora 2020 Articles Substance abuse--PreventionYouth--Substance use--PreventionTeenagersHealth education
10. Do population trends in adolescent electronic cigarette use coincide with changes in prevalence of cigarette smoking? Kristjansson, Alfgeir L.; Allegrante, John P.; Sigfusson, Jon; Sigfusdottir, Inga Dora 2019 Articles TeenagersTeenagers--Health and hygieneElectronic cigarettesSmoking