TY - JOUR AU1 - Bartels, Meike AU2 - Hendriks, Anne AU3 - Mauri, Matteo AU4 - Krapohl, Eva AU5 - Whipp, Alyce AU6 - Bolhuis, Koen AU7 - Conde, Lucia AU8 - Luningham, Justin AU9 - Fung Ip, Hill AU1 - Hagenbeek, Fiona AU1 - Roetman, Peter AU1 - Gatej, Raluca AU1 - Lamers, Audri AU1 - Nivard, Michel AU1 - Dongen, Jenny AU1 - Lu, Yi AU1 - Middeldorp, Christel AU1 - Beijsterveldt, Toos AU1 - Vermeiren, Robert AU2 - Hankemeijer, Thomas AU2 - Kluft, Cees AU2 - Medland, Sarah AU2 - Lundström, Sebastian AU2 - Rose, Richard AU2 - Pulkkinen, Lea AU2 - Vuoksimaa, Eero AU2 - Korhonen, Tellervo AU2 - Martin, Nicholas AU2 - Lubke, Gitta AU3 - Finkenauer, Catrin AU3 - Fanos, Vassilios AU3 - Tiemeier, Henning AU3 - Lichtenstein, Paul AU3 - Plomin, Robert AU3 - Kaprio, Jaakko AU3 - Boomsma, Dorret AB - Childhood aggression and its resulting consequences inflict a huge burden on affected children, their relatives, teachers, peers and society as a whole. Aggression during childhood rarely occurs in isolation and is correlated with other symptoms of childhood psychopathology. In this paper, we aim to describe and improve the understanding of the co-occurrence of aggression with other forms of childhood psychopathology. We focus on the co-occurrence of aggression and other childhood behavioural and emotional problems, including other externalising problems, attention problems and anxiety–depression. The data were brought together within the EU-ACTION (Aggression in Children: unravelling gene-environment interplay to inform Treatment and InterventiON strategies) project. We analysed the co-occurrence of aggression and other childhood behavioural and emotional problems as a function of the child’s age (ages 3 through 16 years), gender, the person rating the behaviour (father, mother or self) and assessment instrument. The data came from six large population-based European cohort studies from the Netherlands (2x), the UK, Finland and Sweden (2x). Multiple assessment instruments, including the Child Behaviour Checklist (CBCL), the Strengths and Difficulties Questionnaire (SDQ) and Multidimensional Peer Nomination Inventory (MPNI), were used. There was a good representation of boys and girls in each age category, with data for 30,523 3- to 4-year-olds (49.5% boys), 20,958 5- to 6-year-olds (49.6% boys), 18,291 7- to 8-year-olds (49.0% boys), 27,218 9- to 10-year-olds (49.4% boys), 18,543 12- to 13-year-olds (48.9% boys) and 10,088 15- to 16-year-olds (46.6% boys). We replicated the well-established gender differences in average aggression scores at most ages for parental ratings. The gender differences decreased with age and were not present for self-reports. Aggression co-occurred with the majority of other behavioural and social problems, from both externalising and internalising domains. At each age, the co-occurrence was particularly prevalent for aggression and oppositional and ADHD-related problems, with correlations of around 0.5 in general. Aggression also showed substantial associations with anxiety–depression and other internalizing symptoms (correlations around 0.4). Co-occurrence for self-reported problems was somewhat higher than for parental reports, but we found neither rater differences, nor differences across assessment instruments in co-occurrence patterns. There were large similarities in co-occurrence patterns across the different European countries. Finally, co-occurrence was generally stable across age and sex, and if any change was observed, it indicated stronger correlations when children grew older. We present an online tool to visualise these associations as a function of rater, gender, instrument and cohort. In addition, we present a description of the full EU-ACTION projects, its first results and the future perspectives. TI - Childhood aggression and the co-occurrence of behavioural and emotional problems: results across ages 3–16years from multiple raters in six cohorts in the EU-ACTION project JF - European Child & Adolescent Psychiatry DO - 10.1007/s00787-018-1169-1 DA - 2018-05-29 UR - https://www.deepdyve.com/lp/springer-journals/childhood-aggression-and-the-co-occurrence-of-behavioural-and-1ts0YTnepU SP - 1105 EP - 1121 VL - 27 IS - 9 DP - DeepDyve ER -