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Tokyo Teen Cohort study: a prospective cohort study on general population of adolescents
- S. Ando, A. Nishida, S. Yamasaki, K. Endo, M. Hiraiwa-Hasegawa, K. Kasai
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S465
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Introduction
Adolescence is the period when many mental disorders have their peaks of onsets. Investigation into adolescent mental health problems and their risk factors is required, but there has been few prospective cohort studies on adolescent mental health.
ObjectivesThis study aimed to prospectively reveal the developmental trajectory of physical and mental health in adolescence, and to investigate factors associated with the trajectory.
MethodsWe launched a prospective cohort study (Tokyo Teen Cohort: TTC) on general population of adolescents at three municipalities in metropolitan area in Tokyo, Japan. Using the resident register, we recruited 10-year-old children from the community between 2012 and 2015. The second, third, and fourth wave of data collection were conducted at 12, 14, 16 years of age, respectively. We collected multidisciplinary data including mental health by self-report questionnaire and home-visit interview. Further, we have launched two subsample studies which focus on biological measures such as brain MRI, EEG, and sex hormones. TTC is based at three research institutes, and ethics approval has been granted by all of the three institutions.
ResultsA total of 3171 children participated the TTC. Of those, 3007 children participated in the second wave of data collection (follow-up rate: 94.8). The third and fourth wave of data collection were completed and more than 80% of children continued to participate in TTC. More than 300 children participated in the two subsample studies. More than 30 papers were already published, and many national/international research collaborations have started.
ConclusionsThe fifth wave of data collection at 20 years of age is being currently conducted. Further national/international collaborations are expected to examine cultural effects on mental health of adolescents.
Disclosure of InterestNone Declared
Being Praised for Prosocial Behaviors Longitudinally Reduces Depressive Symptoms in Early Adolescents: A Population-Based Cohort Study
- D. Nagaoka, N. Tomoshige, S. Ando, M. Morita, T. Kiyono, S. Kanata, S. Fujikawa, K. Endo, S. Yamasaki, M. Fukuda, A. Nishida, M. Hiraiwa-Hasegawa, K. Kasai
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- Journal:
- European Psychiatry / Volume 66 / Issue S1 / March 2023
- Published online by Cambridge University Press:
- 19 July 2023, p. S330
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- Article
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- You have access Access
- Open access
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Introduction
Depression is highly prevalent and causes a heavy burden in adolescent life. Being praised for prosocial behavior might be a preventive factor because both being praised and prosocial behavior are protective against depression. However, no study has investigated the association between experiences of being praised for prosocial behavior and depressive symptoms in adolescents.
ObjectivesHere, we investigated the longitudinal relationship between being praised for prosocial behavior and depressive symptoms in adolescents.
MethodsIn Tokyo Teen Cohort study (TTC), an ongoing prospective population-based cohort study, we collected 3,171 adolescents’ data on self-reported experiences of being praised for prosocial behavior, depressive symptoms, and caregiver-evaluated prosocial behavior. Ten-year-old children were asked to freely describe answers to the question “What are you praised for?”. Only children who clearly answered that they were praised for their prosocial behavior were designated the “prosocial praise group.” The degree of depression at ages 10 and 12 was measured with the Short Mood and Feelings Questionnaire (SMFQ), a self-report questionnaire about depression. Objective prosocial behavior of the 10 year-old children was assessed by the Strength and Difficulty Questionnaire (SDQ). Multiple linear regression analysis was performed using the SMFQ score at age 12 as the objective variable and being praised for prosocial behavior as the main explanatory variable, and the SMFQ score at age 10 and the objective prosocial behavior at age 10 were included as confounders.
Results3,007 pairs of child and their primary caregiver participated in the second data collection at the age of 12 years (follow-up rate was 94.8%). Regarding the question “What are you praised for?”, 845 (28.1%) children answered that they were praised for prosocial behavior. Depressive symptoms (SMFQ scores) in the “prosocial praise group” were significantly lower than those in the other group both at age 10 (4.3 ± 4.4 vs. 4.9 ± 4.6, p < 0.001) and at age 12 (3.4 ± 4.2 vs. 4.0 ± 4.6, p < 0.01). In the single regression analysis, the children who reported being praised for prosocial behavior at age 10 had significantly lower depressive symptoms at age 12 (partial regression variable: −0.57, 95% confidence interval (CI) [−0.96, −0.17]). This association remained significant after adjusting for confounders, including baseline depressive symptoms (partial regression variable: −0.44, 95% CI [−0.80, −0.08]). Prosocial behavior alone was not associated with depressive symptoms.
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ConclusionsBeing praised for prosocial behavior rather than objective prosocial behavior at 10 years of age predicted lower depressive symptoms 2 years later. Praise for adolescents’ prosocial behavior can be encouraged to prevent depression.
Disclosure of InterestNone Declared