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1.
Artículo en Inglés | MEDLINE | ID: mdl-38819661

RESUMEN

The unmet need for mental health care is a global concern. There is a lack of cross-cultural studies examining adolescent help-seeking behavior from both formal and informal sources, including both high-and lower-income countries. This study investigates mental health help-seeking behavior in eight Asian and European countries. Data from 13,184 adolescents aged 13-15 (51% girls) was analysed using mixed-effects logistic regression with school-wise random intercepts to compare countries and genders. Although a significant proportion of adolescents considered getting or sought informal help, formal help-seeking remained exceptionally low, especially in middle-income countries (< 1%), while it ranged from 2 to 7% in high-income countries. Among adolescents with high emotional and behavioral problems (scoring above the 90th percentile on the Strengths and Difficulties Questionnaire), 1-2% of those in middle-income countries and 6-25% of those in high-income countries sought formal help. Girls generally seek more help than boys. The study shows the most adolescents do not receive formal help for mental health problems. The unmet need gap is enormous, especially in lower-income countries. Informal sources of support, including relatives, peers, and teachers, play a crucial role, especially in lower-income countries.

2.
Eur Child Adolesc Psychiatry ; 32(6): 995-1013, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35962147

RESUMEN

There is increasing knowledge that the COVID-19 pandemic has had an impact on mental health of children and young people. However, the global evidence of mental health changes before compared to during the COVID-19 pandemic focusing on children and young people has not been systematically reviewed. This systematic review examined longitudinal and repeated cross-sectional studies comparing before and during COVID-19 pandemic data to determine whether the mental health of children and young people had changed before and during the COVID-19 pandemic. The Web of Science, PubMed, Embase and PsycINFO databases were searched to identify peer-reviewed studies that had been published in English and focused on children and young people between 0 and 24 years of age. This identified 21 studies from 11 countries, covering more than 96,000 subjects from 3 to 24 years of age. Pre-pandemic and pandemic data were compared. Most studies reported longitudinal deterioration in the mental health of adolescents and young people, with increased depression, anxiety and psychological distress after the pandemic started. Other findings included deteriorated negative affect, mental well-being and increased loneliness. Comparing data for pandemic and pre-pandemic periods showed that the COVID-19 pandemic may negatively impact the mental health of children and young people. There is an urgent need for high-quality research to address the impact, risks and protective factors of the pandemic on their mental health, as this will provide a good foundation for dealing with future health emergencies and other crises.


Asunto(s)
COVID-19 , Adolescente , Niño , Humanos , Salud Mental , Pandemias , Estudios Transversales , Ansiedad/epidemiología , Depresión
3.
Front Psychiatry ; 13: 823609, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35546950

RESUMEN

Background: Research on perceived school safety has been largely limited to studies conducted in Western countries and there has been a lack of large-scale cross-national studies on the topic. Methods: The present study examined the occurrence of adolescents who felt unsafe at school and the associated factors of perceived school safety in 13 Asian and European countries. The data were based on 21,688 adolescents aged 13-15 (11,028 girls, 10,660 boys) who completed self-administered surveys between 2011 and 2017. Logistic regression analyses were used to estimate odds ratios and 95% confidence intervals. Findings: The number of adolescents who felt unsafe at school varied widely across countries, with a mean occurrence of 31.4% for the total sample: 31.3% for girls, and 31.1% for boys. The findings revealed strong independent associations between feeling unsafe and individual and school-related factors, such as being bullied, emotional and behavioral problems and feeling that teachers did not care. The study also found large variations in perceived school safety between schools in many countries. Conclusion: The findings emphasize the need to create safe educational environments for all students, based on positive relationships with teachers and peers. School-based interventions to prevent bullying and promote mental health should be a natural part of school safety promotion.

4.
Child Adolesc Psychiatry Ment Health ; 16(1): 15, 2022 Feb 25.
Artículo en Inglés | MEDLINE | ID: mdl-35216630

RESUMEN

BACKGROUND: The COVID-19 pandemic has impacted on psychiatric symptoms of children and young people, but many psychiatric services have been disrupted. It is unclear how service use, self-harm and suicide has changed since the pandemic started. To gain timely information, this systematic review focused on studies based on administrative data that compared psychiatric service use, self-harm and suicide before and during the pandemic among children and young people. METHODS AND FINDING: A systematic review of studies published in English from 1 January 2020 to 22 March 2021 was conducted, using the Web of Science, PubMed, Embase and PsycINFO databases. Increases or reductions in service use were calculated and compared using percentages. Of the 2,676 papers retrieved, 18 were eligible for the review and they provided data from 19 countries and regions. Most studies assessed changes during the early phase of the COVID-19 pandemic, from March to July 2020, and three assessed the changes until October 2020. Fifteen studies reported a total of 21 service use outcomes that were quantitively examined. More than three-quarters of the 21 outcomes (81%) fell by 5-80% (mean reduction = 27.9%, SD = 35%). Ten of the 20 outcomes for psychiatric emergency department (ED) services reduced by 5% to 80% (mean = 40.1%, SD = 34.9%) during the pandemic. Reductions in service use were also recorded for ED visits due to suicide ideation and self-harm, referrals to secondary mental health services, psychiatric inpatient unit admissions and patients receiving treatment for eating disorders. However, there were also some increases. Suicide rate and the number of ED visits due to suicide attempts have increased, and there was an increase in the number of treatment sessions in a service that provided telemedicine. CONCLUSION: Most of the studies showed reductions in the use of psychiatric services by children and young people during the early phase of the pandemic and this highlighted potential delays or unmet needs. Suicide rate has increased during the second wave of the pandemic. Further studies are needed to assess the pattern of service use in the later phases of the COVID-19 pandemic.

5.
Soc Psychiatry Psychiatr Epidemiol ; 57(5): 1017-1026, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35182159

RESUMEN

PURPOSE: Pain symptoms are common in childhood. They often lead to functional impairment and co-occur with psychiatric difficulties. Although children's lives have undergone enormous changes in recent decades, long-term data on changes in pain symptoms, and in comorbid psychiatric difficulties, is lacking. This knowledge is crucial, as co-occurring psychiatric symptoms are significant predictors of long-term outcome for children who suffer from pain. The main purpose of the present study was to explore secular changes in comorbid pain and psychiatric symptoms. METHODS: Four population-based, cross-sectional surveys of 8-9-year-old children were conducted in Southwest Finland in 1989, 1999, 2005, and 2013. Identical methodologies and questionnaire-based measures were used each study year. Participation ranged from 891 to 986 over the study period. The children were asked about the frequency of headache, abdominal pain, and other pains. Children, their parents, and teachers provided information on the child's psychiatric difficulties, including internalizing and externalizing symptoms. RESULTS: The cumulative odds ratios and 95% confidence intervals for the overall prevalence of pain symptoms increased among both genders from 1989 to 2013 and ranged from 1.4 (1.03-1.8) for other pains to 2.4 (1.7-3.3) for abdominal pain. Comorbid internalizing symptoms increased among girls with odd ratios and 95% CIs of 1.8 (1.03-3.1) for children with any kind of pain, and 3.0 (1.4-6.2) for children with headache. No changes were found among boys. CONCLUSION: Overall pain symptoms doubled in both genders, but the most novel finding was that comorbid emotional difficulties tripled among girls who reported headaches. Further research is needed to confirm, and explain, these findings.


Asunto(s)
Dolor Abdominal , Cefalea , Dolor Abdominal/epidemiología , Dolor Abdominal/psicología , Niño , Comorbilidad , Estudios Transversales , Femenino , Cefalea/epidemiología , Cefalea/psicología , Humanos , Masculino , Prevalencia
7.
BMC Med Educ ; 21(1): 563, 2021 Nov 06.
Artículo en Inglés | MEDLINE | ID: mdl-34742258

RESUMEN

BACKGROUND: Medical students are prone to mental disorders, such as depression and anxiety, and their psychological burden is mainly related to their highly demanding studies. Interventions are needed to improve medical students' mental health literacy (MHL) and wellbeing. This study assessed the digital Transitions, a MHL program for medical students that covered blended life skills and mindfulness activities. METHODOLOGY: This was a one group, quasi-experimental pretest-posttest study. The study population was 374 first-year students who started attending the medical faculty at the University of Turku, Finland, in 2018-2019. Transitions was provided as an elective course and 220 students chose to attend and 182 agreed to participate in our research. Transitions included two 60-minute lectures, four weeks apart, with online self-learning material in between. The content focused on life and academic skills, stress management, positive mental health, mental health problems and disorders. It included mindfulness audiotapes. Mental health knowledge, stigma and help-seeking questionnaires were used to measure MHL. The Perceived Stress Scale and General Health Questionnaire measured the students' stress and health, respectively. A single group design, with repeated measurements of analysis of variance, was used to analyze the differences in the mean outcome scores for the 158 students who completed all three stages: the pre-test (before the first lecture), the post-test (after the second lecture) and the two-month follow-up evaluation. RESULTS: The students' mean scores for mental health knowledge improved (-1.6, 95% Cl -1.9 to -1.3, P<.001) and their emotional symptoms were alleviated immediately after the program (0.5, 95% Cl 0.0 to 1.1, P=.040). The changes were maintained at the two-month follow up (-1.7, 95% Cl -2.0 to -1.4, P<.001 and 1.0, 95% Cl 0.2 to 1.8, P=.019, respectively). The students' stress levels reduced (P=.022) and their attitudes towards help-seeking improved after the program (P<.001), but these changes were not maintained at the two-month follow up. The stigma of mental illness did not change during the study (P=.13). CONCLUSIONS: The digital Transitions program was easily integrated into the university curriculum and it improved the students' mental health literacy and wellbeing. The program may respond to the increasing global need for universal digital services, especially during the lockdowns due to the COVID-19 pandemic. TRIAL REGISTRATION: The trial was registered at the ISRCTN registry (26 May 2021), registration number 10.1186/ ISRCTN10565335 ).


Asunto(s)
Alfabetización en Salud , Salud Mental , Estudiantes de Medicina , COVID-19 , Control de Enfermedades Transmisibles , Humanos , Pandemias
8.
JCPP Adv ; 1(1): e12001, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37431502

RESUMEN

Background: Being among the youngest in class has previously been associated with attention-deficit/hyperactivity disorder (ADHD) and academic disadvantage, but the relative age effect on learning disorders is less well understood. This study examined whether relatively young children are more likely to be diagnosed with specific learning disorders than their older peers. Methods: The setting included all 388,650 children born singleton in Finland from 1996 to 2002. Cases diagnosed with specific learning disorders in specialized health care by the age of 10 were identified from national registers. Cumulative incidences of specific learning disorders and the corresponding incidence rate ratios (IRRs) and 95% confidence intervals (CIs) were calculated for each birth month compared to January. Results: During follow-up, 3162 (0.8% of 388,650) children were diagnosed with a specific learning disorder. Children born in December displayed higher cumulative incidences for specific learning disorders than children born in January (IRR: 1.77, 95% CI: 1.50-2.11). The findings were similar for girls (IRR: 2.01, 1.44-2.83) and boys (IRR: 1.70, 1.39-2.08). ADHD did not explain the association, as the IRR for the youngest children with specific learning disorders and ADHD was 1.59 (1.13-2.26) compared to those without ADHD (IRR: 1.84, 1.51-2.24). Conclusions: Relatively younger children in Finnish schools were more likely to be diagnosed with a specific learning disorder by the age of 10. Increased awareness of how relative age differences affect the likelihood for children to be diagnosed with specific learning disorders is needed among parents, clinicians, and teachers.

9.
Scand J Psychol ; 62(1): 34-40, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32776566

RESUMEN

Anxiety disorders are the most common mental disorders in children and youth. Effective screening methods are needed to identify children in need of treatment. The Screen for Child Anxiety Related Emotional Disorders (SCARED) questionnaire is a widely used tool to assess childhood anxiety. We aim toevaluate the psychometric properties of the SCARED questionnaire, test the SCARED factor structure, and evaluate the prevalence of anxiety symptoms in a community sample of Finnish elementary school children, based on both a child and parent report. The sample included all pupils (n = 1,165) in grades 2 through 6 (ages 8-13) in four elementary schools in the city of Turku, Finland. Children completed a Finnish translation of the SCARED questionnaire at school, with one parent report questionnaire per child completed at home. In total, 663 child-parent dyads (56.9%) completed the questionnaire. Internal consistency was high for both child and parent reports on all subscales (0.71-0.92), except for school avoidance (0.57 child, 0.63 parent report). Inter-rater reliability ranged from poor to fair across subscales (intraclass correlation 0.27-0.47). Self-reported anxiety scores were higher than the parent reported scores. Females had significantly higher total scores than males based on the child reports (p = 0.003), but not the parent reports. In the confirmatory factor analysis, hypothesized models did not have a good fit with the data, and modification was needed. The Finnish SCARED questionnaire has good internal consistency. Low child-parent agreement calls for the importance of including both child and parental reports in the assessment of anxiety symptoms.


Asunto(s)
Trastornos de Ansiedad/diagnóstico , Ansiedad/diagnóstico , Emociones/fisiología , Adolescente , Ansiedad/psicología , Trastornos de Ansiedad/psicología , Niño , Análisis Factorial , Femenino , Finlandia , Humanos , Masculino , Psicometría , Reproducibilidad de los Resultados , Instituciones Académicas , Autoinforme , Encuestas y Cuestionarios
10.
Acta Paediatr ; 109(12): 2656-2663, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-32496630

RESUMEN

AIM: To assess whether relative age was associated with bullying involvement and whether the associations were independent of child psychiatric symptoms. METHODS: Bullying was assessed among 8576 children in the second grade, aged 8 years, by using four cross-sectional population-based studies with identical methodology completed by children, parents and teachers in 1989 (response rate 97%), 1999 (93%), 2005 (90%) and 2013 (86%). The main outcomes were bullying victimisation and perpetration. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated with the relatively oldest as the reference group and adjusted for child psychiatric symptoms. RESULTS: The relatively youngest children, born September to December, were compared with the relatively oldest, born January to April. The youngest children had increased odds of being victims according to child (OR 1.2, 95% CI 1.1-1.4) and parent reports (OR 1.2 95% CI 1.008-1.4). The youngest also had decreased odds of being perpetrators according to child (OR 0.8, 95% CI 0.7-0.96) and teacher reports (OR 0.8, 95% CI 0.7-0.95). These findings were independent of psychiatric symptoms. CONCLUSION: The relative age effects which were found in bullying involvement were independent of psychiatric symptoms. Considering this newly recognised risk factor for victimisation is important within anti-bullying practices.


Asunto(s)
Acoso Escolar , Víctimas de Crimen , Trastornos Mentales , Anciano , Niño , Estudios Transversales , Humanos , Factores de Riesgo
11.
Eur Child Adolesc Psychiatry ; 28(4): 521-530, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30220075

RESUMEN

The use of children's mental health services has increased, but most children with psychiatric problems are still not in contact with these services. This time-trend study assessed changes in considered and reported service use over a 24-year period and studied the factors associated with it using four cross-sectional studies. Information was gathered on 8-year-old children living in the area covered by Turku University Hospital, Finland, at four time points: 986 children in 1989, 891 in 1999, 930 in 2005, and 942 in 2013. The same study design, methods and school districts were used each year and the participation rates varied between 86 and 95%. Parents and teachers completed questionnaires concerning the child's psychiatric symptoms and service use. The considered and reported service use increased continuously during the study period. In 1989, 2.4% of children had used services and in 2013 this was 11.0% (OR 5.0, 95% CI 3.1-8.0). Reported service use also increased among children with comorbid problems, from 18.3 to 50.7% (OR 5.0, 95% CI 2.1-12.0). Psychiatric problems and some family factors were associated with service use, but the increase was not explained by these factors. The increase in child mental health service use may reflect better public awareness of mental health problems, fewer barriers to accessing care and decrease of stigma. Although more children are using mental health services, there are still a large number of children with mental health problems who have not been in contact with services.


Asunto(s)
Servicios de Salud Mental/tendencias , Trastornos del Neurodesarrollo/epidemiología , Trastornos del Neurodesarrollo/terapia , Niño , Estudios Transversales , Femenino , Finlandia/epidemiología , Humanos , Masculino , Trastornos del Neurodesarrollo/psicología , Padres/psicología , Instituciones Académicas/tendencias , Encuestas y Cuestionarios , Factores de Tiempo
12.
Scand J Psychol ; 60(1): 67-76, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30395688

RESUMEN

This cross-sectional population-based survey compares the prevalence of self-reported body image and eating distress symptoms among adolescents in Japan and Finland, and associations between emotional/behavioral problems, body image and eating distress from a cross-cultural perspective. The study included 1,840 Japanese and 1,135 Finnish 8th grade students. The self-reported questionnaire included the Body Image and Eating Distress Scale and Strengths and Difficulties Questionnaire (SDQ). The female adolescents from both Finland and Japan reported much greater dissatisfaction with, and concern about, their bodies than the males and Japanese females expressed even higher distress than Finnish females. High levels of body image and eating distress were associated with psychiatric problems measured with the SDQ. There was a significant three-way interaction effect of body image and eating distress, gender and country with SDQ peer problems and prosocial behavior.


Asunto(s)
Imagen Corporal/psicología , Comparación Transcultural , Conducta Alimentaria/etnología , Trastornos de Alimentación y de la Ingestión de Alimentos/etnología , Estrés Psicológico/etnología , Adolescente , Femenino , Finlandia/etnología , Humanos , Japón/etnología , Masculino , Factores Sexuales
13.
Eur Child Adolesc Psychiatry ; 27(12): 1633-1643, 2018 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29704065

RESUMEN

This study reports time-trend changes in self-reported mental health problems, smoking, and alcohol habits among Finnish adolescents over a 16-year period using three cross-sectional studies with similar designs, methodologies, and geographical recruitment areas. There were 4508 participants with a mean age of 14.4 years (range 13-18) in 1998 (n = 1449), 2008 (n = 1560), and 2014 (n = 1499). The information they provided on their mental health was measured with the Strengths and Difficulties Questionnaire and they were also asked questions about their alcohol and smoking habits. The findings showed that from 1998 to 2014 females reported less hyperactivity and conduct problems and males reported fewer peer problems and better prosocial skills. The only mental health problem that showed a significant increase was emotional symptoms among females. Smoking and alcohol use consistently decreased in males and females during the 16-year period. Our findings suggest that overall adolescent's self-reported mental health problems were either stable or falling, indicating increased well-being. The decreased smoking indicates that anti-smoking campaigns have been successfully changing teenagers' attitudes towards smoking. The important finding is that self-reported emotional symptoms had increased in females. This may indicate an increase or earlier onset of affective disorders.


Asunto(s)
Consumo de Bebidas Alcohólicas/epidemiología , Trastornos Mentales/epidemiología , Salud Mental/tendencias , Fumar/epidemiología , Población Blanca/psicología , Adolescente , Consumo de Bebidas Alcohólicas/psicología , Consumo de Bebidas Alcohólicas/tendencias , Déficit de la Atención y Trastornos de Conducta Disruptiva/epidemiología , Estudios Transversales , Emociones , Femenino , Finlandia/epidemiología , Humanos , Masculino , Trastornos Mentales/psicología , Autoinforme , Fumar/psicología , Fumar/tendencias , Encuestas y Cuestionarios , Productos de Tabaco
14.
J Child Psychol Psychiatry ; 59(2): 171-179, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-28892142

RESUMEN

BACKGROUND: Loneliness in childhood has a wide range of negative consequences for well-being and mental health later in life. This study reports time-trends in children's loneliness and the association between children's loneliness and psychiatric symptoms over a 24-year period. METHODS: Information on 3,749 eight-year-old Finnish-speaking children born in 1981, 1991, 1997, and 2004 was gathered at four time points from the area covered by Turku University Hospital in southwest Finland. The actual numbers of participants at these time points were 986 (1989), 891 (1999), 930 (2005), and 942 (2013), with participation rates of 86%-95%. The study design and methods were similar at every time point. Information on children's loneliness and friendships was obtained from the children and also parents and teachers evaluated how many friends children had and their psychiatric symptoms. RESULTS: Approximately 20% of the children reported loneliness at each time point, 5% always felt lonely, and 25% wished they had more friends. Conduct and emotional problems, and hyperactivity were independently associated with loneliness in the multiple-regression analysis. The strength of these associations remained at similar levels over the 24-year study period. Living in a nonnuclear family, parents with a lower level of vocational education, and negative life events among the girls in the study were all associated with loneliness. CONCLUSIONS: Loneliness was a common phenomenon in childhood, and no notable changes were found during the 24-year study period. Psychiatric symptoms were strongly associated with loneliness. It is important to pay attention to children's loneliness and make it an integral part of school health care. Further epidemiological research is needed.


Asunto(s)
Amigos/psicología , Soledad/psicología , Trastornos Mentales/psicología , Niño , Femenino , Finlandia/epidemiología , Humanos , Masculino , Trastornos Mentales/epidemiología
15.
J Am Acad Child Adolesc Psychiatry ; 55(8): 717-725.e2, 2016 08.
Artículo en Inglés | MEDLINE | ID: mdl-27453086

RESUMEN

OBJECTIVE: The aim of this study was to examine changes in the mental health problems, bullying, and service use of 8-year-old children at 4 different time points (1989, 1999, 2005, and 2013) using population-based, time-trend data. METHOD: Information from 4 cross-sectional samples was compared over a 24-year period. The target population was Finnish-speaking children born in 1981 (n = 1,038), 1991 (n = 1,035), 1997 (n = 1,030), and 2004 (n = 1,114) and living in selected school districts in the Turku University Hospital area in southwestern Finland. The participation rates varied from 84% (2005) to 95% (1989). Information about the children's psychiatric symptoms, bullying experience, and service use was obtained from parents and teachers using Rutter questionnaires. Child depression was measured using the Children's Depression Inventory (CDI). RESULTS: Parental reports showed that emotional (p < .001) and conduct (p = .001) problems among boys and emotional (p = .002) problems among girls decreased over the 24-year period. In teacher reports, there were no significant changes in hyperactivity, emotional, and conduct problems between 1989 and 2013. Girls' self-reported depression scores increased between 1989 and 2005, but leveled off in 2013. There were no significant decreases in bullying behavior between 2005 and 2013 despite the introduction of a nationwide school-based anti-bullying program in 2009. Mental health service use increased constantly during the study period: in 1989, 4.2% of boys and 0.9% of girls were in contact with services, and by 2013 this had risen to 15.1% and 6.1% (p < .001). CONCLUSION: No substantial increases in children's mental health problems were seen between 1989 and 2013. Service use increased constantly, indicating lower thresholds for seeking help. Bullying behavior is strongly related to mental health problems, and that is why school-based bullying interventions, including mental health perspectives, are needed.


Asunto(s)
Acoso Escolar/estadística & datos numéricos , Servicios de Salud Mental/estadística & datos numéricos , Salud Mental/estadística & datos numéricos , Niño , Estudios Transversales , Femenino , Finlandia/epidemiología , Humanos , Masculino , Salud Mental/tendencias
16.
Acta Paediatr ; 105(5): 522-8, 2016 May.
Artículo en Inglés | MEDLINE | ID: mdl-26741067

RESUMEN

AIM: There are few population-based studies on bullying behaviour among preschool children. The aims of the study were to investigate the prevalence of bullying behaviour among four-year-old children, as reported by their parents, the prevalence of types of bullying behaviour and the associations between bullying behaviour and psychosocial factors. METHODS: This study was based on a population-based study sample of 931 children who attended their check-up at a child health clinic at four years of age. Parents completed the questionnaire about their child's bullying behaviour and risk factors during the check-up. RESULTS: Bullying behaviour, especially being both a bully and a victim, was a common phenomenon among four-year-old children. Being a bully or both a bully and victim were most strongly associated with conduct problems, while being a victim was associated with somatic symptoms and peer problems. CONCLUSION: Bullying behaviour was frequently found in preschool children and associated with a wide range of other problems, which indicate that routine checking of bullying behaviour should be included in child health clinic check-ups. Bullying prevention programmes are usually targeted at school-aged children, but this study highlights the importance of focusing already on preschool children.


Asunto(s)
Acoso Escolar/fisiología , Acoso Escolar/estadística & datos numéricos , Trastorno de la Conducta/etiología , Víctimas de Crimen/psicología , Víctimas de Crimen/estadística & datos numéricos , Síntomas sin Explicación Médica , Grupo Paritario , Preescolar , Trastorno de la Conducta/diagnóstico , Trastorno de la Conducta/epidemiología , Estudios Transversales , Femenino , Finlandia/epidemiología , Encuestas Epidemiológicas , Humanos , Relaciones Interpersonales , Modelos Logísticos , Masculino , Prevalencia , Factores de Riesgo
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