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Background The spread of coronavirus disease (COVID-19) and the accompanying countermeasures can significantly impact the wellbeing of adolescents. There is a lack of longitudinal studies that can shed light on potential social, emotional, and behavioral development in adolescents. We aimed to identify potential changes in adolescent psychosocial functioning from pre-pandemic to peri-pandemic assessment, and secondly, to identify specific patterns of change. Methods This longitudinal study was based on a Lithuanian community sample of 331 adolescents aged 12–16 at T1 (M  =  13.87, SD  =  1.59). T1 data collected before the pandemic (March–June, 2019) was compared with T2 data collected during the COVID-19 outbreak (October 2020). Psychosocial functioning was assessed by The Strengths and Difficulties Questionnaire (SDQ). Multivariate latent change modeling and latent class change approaches were used to identify patterns of change. Results We found a small but significant increase in hyperactivity/inattention, emotional symptoms, but also prosocial behavior from before to during the pandemic, even adjusting for resilience, lifetime abuse experience, and socio-demographic situation. Three change profiles were identified in the latent change analysis: (1) a majority (70.7%) experienced a significant increase in psychosocial problems; (2) a smaller sub-group (19.6%) with increased peer problems only; (3) a small group (9.7%) showing no negative change and an increase in prosocial behavior. Conclusions The study found a significant negative impact of the COVID-19 pandemic on mental health in the majority of adolescents, as well as indications of positive social development in a small group. These findings highlight the importance of identifying and supporting adolescents in the time of the pandemic more effectively. Accumulating knowledge about human responses to the coronavirus, particularly in young people, is pivotal to societal preparedness for future pandemics.

Background: Chronic and repeated trauma are well-established risk factors for complex posttraumatic stress disorder (CPTSD) in adult samples. Less is known about how trauma history and other factors contribute to the development of CPTSD in adolescence. Objective: The aim of this study was to assess the potential contribution of trauma history and social factors to CPTSD in adolescents. Method: In a cross-sectional community study of 1299 adolescents aged 12-16 years, PTSD (n = 97) and CPTSD (n = 108) was assessed with the Child and Adolescent version of the International Trauma Questionnaire (ITQ-CA). Trauma exposure, family functioning, school problems, and social support as potential discriminating factors between the PTSD and CPTSD groups were investigated. Results: Cumulative trauma exposure did not discriminate between PTSD and CPTSD in this sample. CPTSD was associated with family problems (such as financial difficulties and conflicts in the home), school problems (bullying and learning difficulties), and lack of social support. Conclusions: Our study indicates that factors other than cumulative trauma are important for the development of CPTSD in adolescence. Interventions targeting adolescent's social environment both at home and at school may be beneficial. TEPT y TEPT complejo en la adolescencia: factores discriminantes en un estudio transversal de base poblacionalAntecedentes: Los traumatismos crónicos y repetidos son factores de riesgo bien establecidos para el trastorno de estrés postraumático complejo (CPTSD) en muestras de adultos. Se sabe menos acerca de cómo la historia del trauma y otros factores contribuyen al desarrollo de TEPT-C en la adolescencia. Objetivo: El objetivo de este estudio fue evaluar la potencial contribución de la historia de trauma y los factores sociales al TEPT-C en adolescentes. Método: En un estudio comunitario transversal de 1299 adolescentes de 12 a 16 años, se evaluó el PTSD (n = 97) y CPTSD (n = 108) con la versión para Niños y Adolescentes del Cuestionario Internacional de Trauma (ITQ-CA por sus siglas en ingles). Se investigaron la exposición al trauma, el funcionamiento familiar, los problemas escolares y el apoyo social como posibles factores de discriminación entre los grupos de TEPT y TEPT-C. Resultados: La exposición acumulada al trauma no discriminó entre TEPT y TEPT-C en esta muestra. El TEPT-C se asoció con problemas familiares (como dificultades financieras y conflictos en el hogar), problemas escolares (acoso escolar {bullying} y dificultades de aprendizaje) y apoyo social. Conclusiones: Nuestro estudio indica que otros factores además del trauma acumulativo son importantes para el desarrollo de TEPT-C en la adolescencia. Las intervenciones dirigidas al entorno social de los adolescentes tanto en el hogar como en la escuela pueden resultar beneficiosas.

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Aims Cross-cultural studies of posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) based on ICD-11 diagnostic criteria are scarce, especially in adolescence. The study aimed to evaluate the trauma exposure, prevalence and factors associated with PTSD and CPTSD in general populations of adolescents in Lithuania and Japan. Methods The study sample comprised 1746 adolescents from Lithuania (n = 832) and Japan (n = 914), 49.8% female. The mean age of study participants was 15.52 (s.d. = 1.64), ranging from 12 to 18 years. ICD-11 posttraumatic disorders were assessed using the International Trauma Questionnaire – Child and Adolescent version (ITQ-CA). Results More than half of the adolescents in a total sample (61.5%) reported exposure to at least one traumatic event in their lifetime, 80.0% in Lithuania and 44.6% in Japan, with a higher prevalence of interpersonal trauma in Lithuania and more natural disaster exposure in Japan. The prevalence of PTSD was 5.2% (95% CI 3.8–6.9%) and 2.3% (95% CI 1.4–3.5%), CPTSD 12.3% (95% CI 10.1–14.7%) and 4.1% (95% CI 2.9–5.5%) in Lithuanian and Japanese samples, respectively. Cumulative trauma exposure, female gender, loneliness and financial difficulties in family predicted both PTSD and CPTSD in the total sample. Loneliness discriminated CPTSD v. PTSD in both Lithuanian and Japanese samples. Conclusions This cross-cultural study is among the first which reported different patterns of trauma exposure in Asian Japanese and Lithuanian adolescents in Europe. Despite differences in trauma exposure and PTSD/CPTSD prevalence, we found similar predictors in both studies, particularly the importance of cumulative trauma exposure for PTSD/CPTSD, and social interpersonal factors for the risk of CPTSD. The study supports the universality of traumatic stress reactions to adverse life experiences in adolescence across cultures and regions and highlights different levels of traumatisation of adolescents in various countries.