• Attention-deficit/hyperactivity disorder symptoms, perceived stress, and suicidal ideation during the COVID-19 pandemic 

      Stickley, Andrew; Shirama, Aya; Inagawa, Takuma; Ruchkin, Vladislav; Koposov, Roman A; Isaksson, Johan; Inoue, Yosuke; Sumiyoshi, Tomiki (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-11-09)
      Objective: Attention–deficit/hyperactivity disorder (ADHD) symptoms have been linked to suicidal behavior. However, little is known about the mechanisms involved in this association. This study examined ADHD symptoms and suicidal ideation during the COVID-19 pandemic and the role of self–perceived stress in this association.<p> <p>Method: Data were analyzed from an online sample of 1,452 Japanese ...
    • Bulimia symptoms and anger and aggression among adolescents 

      Koposov, Roman A; Stickley, Andrew; Sukhodolsky, D; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-05-05)
      Background Previous research has indicated that anger and aggression may be elevated in adolescents with a bulimia nervosa (BN) diagnosis. However, as yet, little is known about whether bulimia symptoms are linked to anger and aggression in adolescents in the general population. To address this deficit this study aimed to explore the associations between a clinical level of bulimia symptoms (CLBS) ...
    • Bulimia symptoms in Russian youth: Prevalence and association with internalizing problems 

      Koposov, Roman A; Stickley, Andrew; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-01-20)
      <p><b>Background:</b> There has been limited research on bulimia symptoms in adolescents from the general population outside the United States. This study aimed to evaluate the prevalence of bulimia symptoms in Russian youth and explore the associations between a clinical level of self-reported probable bulimia nervosa (BN) and internalizing problems, binge drinking and functional impairment by ...
    • Community Violence Exposure and Eating Disorder Symptoms among Belgian, Russian and US Adolescents: Cross-Country and Gender Perspectives 

      Isaksson, Johan; Isaksson, Martina; Stickley, Andrew; Koposov, Roman A; Schwab-Stone, Mary; Ruchkin, Vladislav; Vermeiren, Robert (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-08-22)
      Community violence exposure (CVE) is one of the most common adverse childhood experiences worldwide. Despite this, its potential effect on disordered eating in adolescents from different cultures is underexplored. In the present crosssectional study, self-reported data were collected from 9751 students (Mean age=14.27) from Belgium, Russia and the US on CVE (witnessing violence and violence ...
    • Community Violence Exposure and School Functioning in Youth: Cross-Country and Gender Perspectives 

      Koposov, Roman A; Isaksson, Johan; Vermeiren, Robert; Schwab-Stone, Mary; Stickley, Andrew; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-07-27)
      <i>Background</i>: Many children and adolescents experience violent events which can be associated with negative consequences for their development, mental health, school, and social functioning. However, findings between settings and on the role of gender have been inconsistent. This study aimed to investigate cross-country and gender differences in the relationship between community violence ...
    • Community violence exposure and substance use: cross‑cultural and gender perspectives 

      Löfving‑Gupta, Sandra; Willebrand, Mimmie; Koposov, Roman A; Blatný, Marek; Hrdlička, Michal; Schwab‑Stone, Mary; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-12-20)
      The negative effects of community violence exposure on child and adolescent mental health are well documented and exposure to community violence has been linked both to a number of internalizing and externalizing symptoms. Our aim was, therefore, to investigate cross-cultural and gender differences in the relationship between community violence exposure and substance abuse. A self-report survey was ...
    • Depressive symptoms and anger and aggression in Russian adolescents 

      Ruchkin, Vladislav; Stickley, Andrew; Koposov, Roman Alexandriovich; Sukhodolsky, D; Isaksson, Johan (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-11-16)
      Research among adolescents exploring the association between depressive symptoms and aggression has produced inconsistent findings. This study investigated the prevalence of clinically significant (current major depressive episode) and subthreshold depressive symptoms in a general population sample of adolescents from Northern Russia and explored their association with aggression and anger, while ...
    • Dopamine-related receptors, substance dependence, behavioral problems and personality among juvenile delinquents 

      Ruchkin, Vladislav; Koposov, Roman A; Oreland, Lars; af Klinteberg, Britt; Grigorenko, Elena L. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-13)
      The objective was two-fold: to examine possible associations between dopamine-related genetic polymorphisms and (1) substance dependence; and (2) self-reported psychiatric disturbances, behavioral problems, and personality. Genotyping of single nucleotide polymorphisms (SNP: s) in COMT, DAT and DRD4 was conducted in 174 Russian male juvenile inmates (14–18 years of age) subdivided into having a ...
    • Exposure to community violence, psychopathology, and personality traits in Russian youth. 

      Koposov, Roman A; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Previous research with the US inner-city youth demonstrated the hazardous effects of community violence exposure. It remains unclear, however, whether these findings are generalizable to other cultures and populations. Furthermore, the role of factors influencing the processing of traumatic events such as personality has not been investigated. Two groups of Russian adolescents (community youth (N ...
    • Inhalant use in adolescents in northern Russia 

      Koposov, Roman A; Stickley, Andrew; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-02)
      <i>Purpose</i>: To determine the prevalence of inhalant use in Russian adolescents and to investigate associated psychosocial problems from a gender perspective. <p> <p><i>Methods</i>: Data on inhalant use and comorbid psychopathology were collected by means of self-reports from 2892 (42.4% boys) sixth to tenth grade students in public schools in Arkhangelsk, Russia. Multivariate analysis of ...
    • Loneliness and health risk behaviours among Russian and U.S. adolescents: a cross-sectional study 

      Stickley, Andrew; Koyanagi, Ai; Koposov, Roman A; Schwab-Stone, Mary; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Loneliness and its association with psychological and somatic health problems among Czech, Russian and U.S. adolescents 

      Stickley, Andrew; Koyanagi, Ai; Koposov, Roman A; Blatný, Marek; Hrdlička, Michal; Schwab-Stone, Mary; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-05-04)
      Background: Loneliness is common in adolescence and has been linked to various negative outcomes. Until now, however, there has been little cross-country research on this phenomenon. The aim of the present study was to examine which factors are associated with adolescent loneliness in three countries that differ historically and culturally-the Czech Republic, Russia and the United States, and to ...
    • Non-suicidal self-injury among incarcerated adolescents: prevalence, personality, and psychiatric comorbidity. 

      Koposov, Roman A; Stickley, Andrew; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-05-19)
      Introduction: Incarcerated adolescents represent a risk group for non-suicidal self-injury (NSSI), but research on this population has been limited and no studies have been conducted in Russia. To address this deficit, this study examined NSSI and the factors associated with it among youth in a juvenile correctional facility in Russia.<p> <p>Methods: NSSI and psychopathology were assessed using ...
    • Peer victimisation and its association with psychological and somatic health problems among adolescents in northern Russia. 

      Stickley, Andrew; Koyanagi, Ai; Koposov, Roman A; McKee, Martin; Roberts, Bayard; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Background: A growing body of evidence from countries around the world suggests that school-based peer victimisation is associated with worse health outcomes among adolescents. So far, however, there has been little systematic research on this phenomenon in the countries of the former Soviet Union. The aim of this study was to examine the relation between peer victimisation at school and a range ...
    • Posttraumatic stress and perceived interpersonal provocation in adolescents. 

      Saunderson, Jonathan Marshall; Stickley, Andrew; Sturidsson, Knut; Koposov, Roman A; Sukhodolsky, Denis G; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-05-25)
      Objective: To examine the impact of posttraumatic stress on the choice of responses to and attribution of intentionality in peer provocation in adolescent boys and girls. Methods: A sample of 2678 adolescents from Northern Russia, aged 13–17 years (59.3% female; 95.7% ethnic Russian) completed self-reports on posttraumatic stress and rated hypothetical peer provocation scenarios that teenagers ...
    • Pro-bullying attitudes among incarcerated juvenile delinquents: Antisocial behavior, psychopathic tendencies and violent crime 

      Wiklund, Gunnar; Ruchkin, Vladislav; Koposov, Roman A; Klinteberg, BA (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
    • Risky sexual behaviour among Russian adolescents: association with internalizing and externalizing symptoms 

      Isaksson, Johan; Westermark, Caroline; Koposov, Roman A; Stickley, Andrew; Ruchkin, Vladislav (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-08-09)
      <i>Background</i> - Risky sexual behaviour (RSB) is regarded as a major health problem during adolescence. Russia has one of the highest rates of teenage pregnancy, abortion and newly diagnosed HIV infections in the world, but research on RSB in Russian youth has been limited. To address this deficit, this study examined the role of several factors, including internalizing and externalizing symptoms, ...