Parental unemployment and educational outcomes in late adolescence: the importance of family cohesion, parental education, and family income in a Norwegian study.

AIMS: The study aimed to investigate the association between parental unemployment and grade point average and school completion in adolescence, and the importance of family cohesion, parental education, and family income in explaining these associations. METHODS: Data stem from the Norwegian cross-sectional 2012 youth@hordaland-survey including 8437 adolescents (53.4% girls). Information on grade point average, school completion, parental education, and family income were retrieved from the National Education Database. Parental work status and family cohesion were assessed by adolescent self-report. RESULTS: Adolescents with at least one unemployed parent had lower grade point averages (3.49 compared with 3.92, P<0.001) and rates of school completion (71.9% compared with 86.6%, P<0.001) compared with adolescents with two working parents. The associations between parental unemployment and both grade point average (b = -0.22, 95% confidence interval -0.32, -0.12) and school completion (odds ratio 0.59, 95% confidence interval 0.46, 0.76) partly attenuated but remained significant when taking family cohesion, parental education, and family income into account. There was a significant interaction between parental unemployment and family cohesion on grade point average, in which the positive association between family cohesion and grade point average was weaker for adolescents with unemployed parents. CONCLUSIONS: Adolescents with parents outside of the workforce are at higher risk of poorer educational outcomes than peers with working parents. Combined with the positive associations between parental education, family cohesion, family income, and educational outcomes, this underscores the importance of parents for adolescent educational outcomes, and suggests that parents and the family situation should be considered when providing academic support for adolescents who struggle in upper secondary school.

Developmental trajectories of conduct problems and time-varying peer problems: the Bergen child study.

BACKGROUND: While it is increasingly acknowledged that conduct problems and peer problems often co-occur in development, less is known about the ways in which peer problems may alter the developmental course of conduct problems for distinct subgroups. METHODS: Using data from a large population-based study in Norway (the Bergen Child Study/youth@hordaland; 47.4% males), we estimated group-based trajectories of conduct problems and the presence of time-varying peer problems on the developmental progression of conduct problems between seven and 19 years of age. Risk factors for group membership were also examined. RESULTS: A 3-group model of conduct problems best fit the data (non-engagers, low-engagers, moderate-stable). The presence of peer problems increased the estimated level of conduct problems for both the low-engagers and moderate-stable groups across adolescence. No differences in conduct problems were observed when peer problems were present in childhood or preadolescence for these two groups, nor for the non-engagers group at any point. Being male, having lower perceived economic wellbeing, and lower levels of parental education predicted group membership for the moderate-stable group, whilst lower paternal education predicted membership for the low-engagers group. CONCLUSIONS: Support for developmental 'turning points' was found, suggesting that adolescence is a particularly salient time for those with conduct problems. In particular, the presence of peer problems can increase observed conduct problems at this stage in development.

Mental health problems and suicidal behavior from adolescence to young adulthood in college: linking two population-based studies.

It is well established that mental health problems are highly recurrent and persistent from childhood to adolescence, but less is known to what extent mental health problems also persist from adolescence into young adulthood. The aim of the current study was therefore to examine the chronicity and risk of mental health problems and suicidality from adolescence to young adulthood. Data stem from two Norwegian population-based studies conducted 6 years apart; the youth@hordaland study from 2012 (age 16-19) and the SHoT2018 study (age 22-25). These two data sources were linked to produce a longitudinal sample of 1257 individuals. A wide range of self-reported mental health and suicidality instruments (used both continuously and categorically) were analyzed using log-link binomial regression analysis, adjusting for age, sex, parental education, and financial problems. We found that high levels of mental health problems in late adolescence were a significant risk factor for reporting poor mental health 6 years later. Internalizing and externalizing problems in adolescence were associated with a 2.8-fold and 1.9-fold increased risk, respectively, of reporting a mental disorder 6 years later. Similarly, self-harm in adolescence was associated with a 2.1-fold increased risk of suicidal thoughts 6 years later. The magnitudes of the adjusted risk ratios were generally similar across the various mental health and suicidality measures used at the two assessment points. Adjustment for confounders did not, or only slightly, attenuate the risk ratios, and all associations remained statistically significant in the adjusted analyses. This longitudinal study provides new evidence of the chronicity of mental health problems and suicidality from adolescence to adulthood in Norway. The results emphasize the importance of early identification and timely interventions to reduce the prevalence and impact of mental health problems and suicidality.

Protective factors associated with resilience among unaccompanied refugee minors after settling in Norway: a matched cross-sectional study.

This study aimed to examine protective factors associated with resilience among unaccompanied refugee minors in comparison to their Norwegian peers and to examine associations between resilience factors and characteristics related to positive outcomes among unaccompanied minors. Data stem from the Pathways to Independence study conducted in Bergen municipality, Norway in 2018-2019 where 81 unaccompanied minors aged 15-20 participated (83.3% male; 80% response rate). An age- and sex-matched control group of 324 adolescents was retrieved from the youth@hordaland study conducted in Norway in 2012. Resilience factors were assessed by the Resilience Scale for Adolescents. Unaccompanied minors reported lower scores on Goal Orientation (d = 0.4), Social Competence (d = 0.4), and Social Support (d = 0.7) compared to Norwegian adolescents. Being male was associated with lower scores on Goal Orientation (standardized mean difference [SMD] = - 0.9) and Social Support (SMD = - 0.9) among unaccompanied minors, while being in frequent contact with family in the home country was associated with higher scores on all resilience factors (SMD range = 0.6-1.1). The number of leisure activities was associated with Social Competence (SMD = 0.22). There were no significant associations between the resilience factors and amount of support in the living arrangements or contact with the child welfare services. Unaccompanied minors reported fewer resilience factors compared to Norwegian adolescents, indicating that they may have different needs compared to other adolescents. Our study also suggests that frequent contact with family in the home country may be important to bolster positive development for unaccompanied minors after settlement.

Secular trends in mental health problems among young people in Norway: a review and meta-analysis.

There is a growing concern that the mental health of recent generations of youth is deteriorating, yet the etiology of these secular changes is not fully understood. We aimed to review the evidence on trends in mental health problems among young people in Norway. Seven large-scale repeated cross-sectional studies were included in this study, comprising 35 cross-sectional data collections between 1992 and 2019, with a total sample of 776,606 young people. Our study found a clear increase in mental health problems among young females in Norway over the past few decades, while the trends were less marked for males. The proportion of individuals scoring above the problematic symptom score threshold increased on average by 11.2% (range 2.2% to 21.9%) for females and 5.2% (range - 0.9% to 11.1%) for males, based on data from the individual studies. The results from a meta-regression analysis showed that across all surveys, mean symptom scores increased by 17% (95% CI 12 to 21%) among females and 5% (95% CI 1 to 9%) among males from 1992 to 2019. Overall, mental health problems have increased continually since the early 1990s among young people, especially among young females. The cause of these secular changes remains unknown but likely reflect the interplay of several factors at the individual and societal level.Protocol registration: Open science framework, November 8, 2021 ( https://osf.io/g7w3v ).

Associations Between Distinct Trauma Classes and Mental Health Care Utilization in Norwegian Adolescents: A National Registry Study.

Adolescents who experience potentially traumatic experiences (PTEs) have an increased risk of psychopathology. PTEs often co-occur and may form interrelated patterns of exposure. This study investigated underlying classes of PTE exposure among Norwegian adolescent participants in the youth@hordaland study, and whether such classes were associated with contact with child and adolescent mental health services (CAMHS) and psychiatric diagnoses. The data stem from the population-based youth@hordaland study conducted in 2012 which was linked to the Norwegian Patient Registry (NPR, n = 8845). Exposure to PTEs was assessed by adolescent self-report whereas psychiatric disorders (Axis 1) were derived from the NPR. Latent Class Analysis was used to identify distinct classes of PTE exposure-patterns in the data. Logistic regression analyses were performed to investigate associations between classes of PTEs and contact with CAMHS and psychiatric diagnoses. Three classes of PTE exposure were identified based on model fit indices and theoretical considerations. Compared with participants in the low trauma class (88% of participants), those in the Situational-(6%) and Interpersonal trauma class (6%) had higher odds-ratios (ORs) for contact with CAMHS (OR = 2.27 (95% CI [1.78, 2.87])) and (OR = 3.26 (95% CI [2.61, 4.04])) respectively, and for being diagnosed with a psychiatric disorder in CAMHS (ORs ranged from 2.19 - 10.4) after adjusting for sex and parental education. There were more participants diagnosed with ADHD within the Interpersonal trauma class compared to the Situational trauma class when adjusting for sex and parental education (OR = 2.22 (95% CI [1.17, 4.40])). Three relatively homogeneous PTE classes, consisting of distinct patterns of trauma exposure were associated with a higher odds of contact with CAMHS and of being diagnosed with a psychiatric disorder in CAMHS. The study highlights the co-occurrence of PTEs and their impact across the diagnostic spectrum.

Psychometric properties of a short self-report measure of rule-breaking behaviour among adolescents: findings from the Ungdata survey.

BACKGROUND: The aim of the present study was to examine the factor structure and reliability of a six-item scale of rule-breaking behaviour, and to test for measurement invariance across gender, age, survey year and geographical location. METHODS: Data were from three yearly cross-sectional and population-based collections of the Ungdata surveys (2017 to 2019) including a total of 297,102 Norwegian adolescents aged approximately 13 to 19 years. Measurements included respondent's rule-breaking behaviour, time, gender, age and geographical location. RESULTS: Confirmatory factor analyses demonstrated that a one-factor solution of the rule-breaking behaviour scale had good fit to data (comparative fit index 0.98; Tucker-Lewis index 0.96; root mean square error of approximation 0.049 (95% confidence interval 0.048, 0.050)), with factor loadings ranging from 0.60 to 0.81 for all items (mean factor loading 0.72). Similar results were found across survey years for both genders. Several multiple group confirmatory factor analyses showed indications of measurement invariance for the scale across gender, age groups, geographical locations and survey years. The ordinal alpha and omega coefficients for internal consistency of the scale were both 0.86. CONCLUSIONS: The six-item scale for self-reported rule-breaking behaviour demonstrated good psychometric properties and appears to constitute a reliable measure of adolescent rule-breaking behaviour for use in population-based surveys in a Norwegian setting.

Mental health among unaccompanied refugee minors after settling in Norway: A matched cross-sectional study.

Aims: To describe the mental health of unaccompanied refugee minors (URMs) settled in Norway and compare their responses to an age- and sex-matched sample of Norwegian young people. Methods: The data were from the Pathways to Independence study of URMs aged 15-20 years (n = 81; 82.7% male; response rate 80%) conducted in 2018-2019 in the Bergen municipality, Norway. The data from the URMs were linked to an age- and sex-matched group of young people from the Norwegian youth@hordaland study conducted in 2012 (n = 324). Mental health was assessed by the Strengths and Difficulties Questionnaire (SDQ). Results: URMs were more likely to agree with most items pertaining to emotional problems, peer problems and prosocial subscales than Norwegian young people. Few differences were found for items on the conduct problems and hyperactivity-inattention problems scales. Poor psychometric properties, including weak factor loadings and low internal consistency, were detected for the SDQ subscales among URMs, except for the emotional problems subscale, indicating that the originally proposed five-factor model fitted the data poorly. Conclusions: URMs appear to have moderately more emotional problems than Norwegian young people. They are more likely to report being alone, getting along better with adults than with their peers and being bullied, but also report being more helpful and sharing with others. Studies with larger samples of URMs should determine the most appropriate factor structure of the SDQ when administered to URM samples.

Parental separation, negative life events and mental health problems in adolescence.

BACKGROUND: Parental separation is associated with mental health problems in adolescence. One suggested pathway for this association is through the accumulated exposure to stress and other negative life events. This study aimed to document the distribution of negative life events among adolescents with separated compared to non-separated parents, and to assess the direct and interactive associations between parental separation, negative life events, and mental health problems in adolescence. METHODS: Data stem from the cross-sectional population-based youth@hordaland study of adolescents (aged 16-19) conducted in Norway in 2012, providing self-reported information about parental separation, negative life events, and depression-, anxiety-, conduct-, and ADHD symptoms. Regression analyses were used to assess the direct and interactive associations between parental separation, negative life events, and mental health problems. RESULTS: Adolescents with separated parents had more mental health problems across all symptom scales compared to peers with non-separated parents, with standardized mean differences [SMDs] ranging from 0.15 to 0.20. Negative life events moderately attenuated these differences (reduced the SMDs with about 0.04-0.08, depending on the outcome). However, none of the interactions between parental separation and negative life events on mental health problems were statistically significant. CONCLUSIONS: Higher exposure to negative life events explains parts of the association between parental separation and mental health problems in adolescence. However, a parental separation does not seem to increase the vulnerability of the effects of negative life events on adolescents' mental health. Assessing exposure to negative life events is important when providing mental health services to adolescents, particularly to those who have parents separated.

Sleep problems among adolescents within child and adolescent mental health services. An epidemiological study with registry linkage.

Sleep problems are prevalent among adolescents, especially among those diagnosed with mental health disorders. There is insufficient knowledge about sleep among adolescents within child and adolescent mental health services (CAMHS) in comparison to the general population. The data are drawn from the youth@hordaland study, a large population-based study conducted in 2012, linked to the Norwegian Patient Registry (NPR) (n = 9077). Psychiatric disorders were based on clinical diagnoses from the NPR, while insomnia, delayed sleep-wake-phase disorder (DSWPD), and other sleep problems/patterns were assessed by self-report questionnaires from youth@hordaland. The prevalence of diagnosed sleep disorders among adolescents seeking mental health services was 0.6%, yielding an estimated prevalence of 0.07% of the population. However, questionnaire-based measurement of insomnia from the youth@hordaland study indicated that insomnia was highly prevalent across disorders in comparison to a reference group of adolescents who were not within mental health care. Insomnia ranged from 29% among adolescents diagnosed with ADHD (PR = 1.79; 95% CI 1.41-2.29) to 48% among adolescents diagnosed with depression (PR = 2.53, 95% CI 2.19-2.92). All diagnostic groups had a mean sleep efficiency below (85%), indicating poor sleep quality. Insomnia, delayed sleep-phase wake disorder, and poor sleep efficiency were confirmed as transdiagnostic sleep problems across psychiatric disorders. In addition, some disorder-specific patterns emerged, such as a higher prevalence of insomnia among adolescents with depression, and DSWPS among adolescents with conduct disorder. This underscores the need for treating sleep problems in CAMHS, and transdiagnostic treatment approaches are warranted.

Depression, anxiety, PTSD, and OCD after stillbirth: a systematic review.

BACKGROUND: This systematic review aimed to provide an updated summary of studies investigating depression, anxiety, post-traumatic stress disorder (PTSD), and obsessive-compulsive disorder (OCD) in parents after stillbirth (from 20 weeks gestational age until birth). METHODS: A literature search was conducted in the databases Web of Science and PsychINFO. Main inclusion criteria were 1) peer-reviewed, quantitative, English-language articles published from 1980; (2) studies investigating depression, anxiety, PTSD, or OCD among parents following stillbirth; and (3) studies defining stillbirth as equal to or after 20 weeks of gestation. RESULTS: Thirteen quantitative, peer-reviewed articles were eligible for inclusion. Selected articles investigated depression, anxiety, and PTSD, while no studies on OCD met our inclusion criteria. The majority of studies investigated women, while only two studies included men. The results indicated heightened short- and long-term levels of depression, anxiety, and PTSD in parents after stillbirth compared to those of parents with live birth. Studies investigating predictors found that social support, marital status, negative appraisals, and variables related to care and management after stillbirth affected levels of symptoms. CONCLUSIONS: Parents who experience stillbirth have a considerably higher risk of reporting symptoms of depression, anxiety, and PTSD compared with parents with live births. More longitudinal studies are needed to increase our knowledge of how symptoms develop over time, and more research on fathers, transgender, non-binary and gender fluid individuals is needed. Research on the association between stillbirth and OCD is also warranted. Knowledge of the severity of anxiety, depression, and PTSD after stillbirth, and predictors associated with symptom severity could provide healthcare professionals with valuable information on how to provide beneficial postpartum care.

Complex families and health complaints among adolescents: A population-based cross-sectional study.

Aims: The structure of adolescents' families has become more complex over the last decades in several western countries. In parallel, health complaints among adolescents appear to have risen in the Nordic countries. This study aimed to examine the association between family structure and health complaints among Norwegian adolescents while capturing biological, half-, and stepsiblings (sibship-type) in the families. Methods: Data stem from the youth@hordaland study, an epidemiological study of adolescents aged 16-19 years (N = 10,257; participation rate = 53%) conducted in 2012. This study is based on a subsample of 8808 adolescents who lived with parent(s). The adolescents provided detailed information on sociodemographics, family structure, sibship-type, and common health complaints among youth (headache, dizziness, and abdominal, neck, back, and shoulder pain). Results: Adolescents in nuclear families and joint physical custody (JPC) reported significantly lower levels of health complaints compared to peers in single- or stepparent families. Independent of family structure, biological siblings were associated with lower levels of health complaints, while stepsiblings were associated with higher levels of health complaints, but only among girls. These findings were robust to adjustments of sociodemographic variables. Conclusions: Health complaints are frequent but unequally distributed across family structures. Adolescents in nuclear families and JPC report lower levels of health complaints compared to peers in single- or stepparent families. Considering siblings appears to be relevant, as biological- and stepsiblings were related to adolescents' symptoms, independent of family structure. In combination, knowledge about family structure and sibship-type may aid the identification of adolescents at risk of experiencing health complaints.

Prospective associations between adolescent risky substance use and school dropout and the role of externalising and internalising problems.

Background: The aim of the present study was to assess to what extent risky substance use (RSU) acts as an important risk factor for school dropout from upper secondary school in a prospective study of Norwegian adolescents, and how externalising and internalising mental health problems influenced this association. Methods: We used data from a large population-based survey (the youth@hordaland-survey), which included adolescents aged 16-19 years. The predictor variables were self-reported RSU. The survey was linked with prospective data from the Norwegian Education Database, following the adolescents to 21-23 years of age. The outcome variable was registry-based school dropout within five years after starting upper secondary school. The analyses were adjusted for sex, age, socioeconomic status, and externalising and internalising problems. Results: After adjustment for sociodemographic variables, all indicators of RSU were prospectively associated with school dropout (adjusted odds ratios 1.26-2.25; all p values <.01). While internalising problems only slightly changed these estimates, the associations were substantially attenuated by externalising problems. Still, all measures of RSU, except frequent alcohol intoxication, remained positively associated with school dropout in the fully adjusted models. For the youngest students, all associations between RSU and school dropout were significant. Conclusions: Adolescent RSU is a strong predictor for school dropout, and externalising problems explained a considerable proportion of this effect. Prevention efforts to reduce student substance could improve academic outcomes among upper secondary school students, and such efforts may benefit from also targeting co-occurring externalising problems.

Trends in physical health complaints among adolescents from 2014 - 2019: Considering screen time, social media use, and physical activity.

The rising rates of physical and mental health complaints among adolescents observed in many countries have coincided with an increased time spent on screen-based devices, including social media use. We sought to document recent trends in physical health complaints (PHC) and whether co-occurring trends in screen time, social media use, and physical activity may account for these trends. To achieve these aims, we used data from the nationwide Ungdata surveys conducted annually at the municipality level in Norway, comprising 419,934 adolescents aged 13-18 from six survey years (2014-2019). Six items assessed PHC, including neck and shoulder pain, headache, and abdominal pain, during the past month. To account for the nesting structure of Ungdata, and to exploit the variation within and between municipalities, we used multilevel analyses with adolescents nested in municipality-years (n = 669), nested in municipalities (n = 345). We found a small to moderate linear increase in number of PHC among boys and girls from 2014 to 2019. Screen time and social media use moderately attenuated the trend for girls, and to a lesser extent for boys. Screen time and social media use were further positively associated with PHC across the between and within-municipality levels, and social media use was more strongly associated with PHC for girls than boys across all levels of analysis. A similar pattern emerged when considering each symptom individually. The results suggest that the prevalence of PHC rose in tandem with a group-level shift towards higher screen time and social media use. Moreover, the results indicate that higher screen time and social media use may have led to changes in the youth culture with potential consequences for adolescents' well-being.

Sleep and dropout from upper secondary school: A register-linked study.

OBJECTIVE: The present study investigates the association between sleep in late adolescence and completion of upper secondary school. METHODS: The data are drawn from the youth@hordaland study, a large population-based study conducted in 2012, linked with official educational data in Norway (N = 8838). RESULTS: High school dropout was more prevalent among adolescents who had insomnia (20.6%) compared to those without insomnia (14.3%; adjusted risk ratios = 1.50; 95% confidence intervals: [2.19-2.92]). There was also a higher rate of school dropout among those who had symptoms of delayed sleep-wake phase (21%) compared to those without delayed sleep-wake phase (14.3%); adjusted risk ratios = 1.43, 95% confidence intervals: (1.28-1.59). School noncompleters were also characterized by reporting 44 minutes shorter sleep duration, longer sleep onset latency, and wake after sleep onset (both approx. 15 minutes) compared to school completers. CONCLUSION: The importance of sleep for high school dropout rates highlights the importance of including sleep as a risk indicator and a possible target for preventive interventions in late adolescence.

Sleep patterns and insomnia among adolescents receiving child welfare services: A population-based study.

OBJECTIVES: Sleep problems are common in adolescence. We aimed to investigate sleep patterns and insomnia in Norwegian adolescents who have been in contact with child welfare services (CWS), both adolescents living in foster care (FC) and adolescents receiving in-home-services (IHS). Both groups were compared to youth who reported they were not receiving child welfare interventions. DESIGN: Cross-sectional. SETTING: The population-based study youth@hordaland from 2012 in Hordaland, Norway. PARTICIPANTS: About 9421 adolescents (53.8% girls), age range 16-19 years, were divided into 3 groups; IHS group (n = 123), FC group (n = 132), and control group (n = 9166). MEASUREMENTS: Self-reported information about demographics, detailed sleep patterns, sleep problems, and adverse life events. RESULTS: Adolescents receiving IHS (vs. controls) had significantly shorter sleep duration, lower sleep efficiency, longer sleep onset latency (SOL), wake after sleep onset (WASO), and higher prevalence of insomnia. They had increased odds of insomnia (adjusted odds ratio [AOR] = 1.77, 95% confidence interval [CI] = 1.19-2.62) and SOL ≥ 30 minutes (AOR = 1.95, CI = 1.32-2.87). Adolescents in FC (vs. controls) reported lower sleep efficiency and longer WASO. When adjusting for sex and age, the associations did not substantially change. When additionally adjusting for adverse life events, the associations were considerably attenuated for both groups, and were no longer significant for the FC group. CONCLUSION: Our results indicate a higher rate of sleep problems among adolescents receiving interventions from CWS, particularly those receiving IHS. Adverse life events accounted for a substantial part of the increased risk of sleep problems.

Joint physical custody and academic achievement among youth: A population-based study with registry linkage.

Previous research has documented that youth in joint physical custody (JPC) often report fewer mental health problems than peers in other postseparation living arrangements. Whether JPC is associated with functional outcomes such as academic achievement has been less examined, and existing work has relied on self-reported school grades and pertinent controls such as parental education. Using data from the Norwegian population-based youth@hordaland study (n = 7,914), we examined the association between living arrangements and academic achievement among youth (16-19 years) using register-based information on grade point average (GPA; range: 1-6), parental education, and income. We also assessed the influence of family cohesion and coresiding biological and half/stepsiblings in explaining differences between youth in JPC and other living arrangements. Across all regression models, youth in JPC had significantly higher GPA (0.2-0.4 points) than youth living with a single mother or father. Parental education had a strong attenuating effect and reduced the magnitude of the difference with 30%-35% for youth in single-parent families and 55% for youth in stepparent families. In conclusion, we find that youth in JPC have a small but significant academic advantage compared to peers in single-parent families, which is not fully accounted for by objective measures of parental education and income, sibling composition, and family cohesion. Future longitudinal studies are needed to disentangle whether positive outcomes associated with JPC are due to inherent qualities of this living arrangement or better captured by preseparation selection mechanisms. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Past Year Cannabis Use Among Norwegian Adolescents: Time Trends Based on the Ungdata Surveys 2010-2019.

Aims: To describe trends in cannabis use from 2010 to 2019 among Norwegian adolescents and relate these to individual- and municipal-level variables. Design: Data from nationwide repeated cross-sectional surveys collected in 2010-2013 (T1), 2014-2016 (T2), and 2017-2019 (T3) were used to describe secular trends in proportions of adolescent cannabis use. Setting: Cross-sectional surveys in 410 of the total 428 municipalities of Norway. Participants: A total of 628,678 survey responses from adolescents aged ~13-19 years of age, in which 566,912 survey responses were eligible for analyses, representing data from 340 municipalities. Measurements: Respondent's past year cannabis use, time, gender, school grade, municipality, geographical location, and municipality population. Findings: Boys reported overall higher cannabis use, with ~2:1 gender ratio for any past year cannabis use and a 3:1 gender ratio for frequent cannabis use. Adolescents in Eastern Norway reported higher cannabis use compared with other areas in the country, and adolescents from municipalities with a higher population size reported higher rates of cannabis use than smaller municipalities. A gradual increase in cannabis use from T1 to T3 was found in Eastern Norway and in the largest municipalities. More generally, proportions of past year cannabis use showed a marked increase from T2 to T3 across genders, grade/age groups, geographical location, and municipality population, with few exceptions. Conclusions: Our findings indicate that proportions of past year cannabis use have increased among Norwegian adolescents in recent years. Preventive interventions to hinder initiation of cannabis use, as well as measures to address frequent cannabis use among Norwegian adolescents, are needed.

Symptoms of disordered eating and participation in individual- and team sports: A population-based study of adolescents.

AIM: This study aimed to investigate individual and team sports participation across sex, age, and levels of body mass index (BMI). We also wanted to explore how symptoms of disordered eating (DE) were associated with participation in individual and team sports, and to what extent BMI moderated this association. METHODS: Data stemmed from a large population-based survey of 10,172 Norwegian adolescents aged 16 to 19 years. Self-reported participation in organized team- and individual sports were the dependent variables. Self-reported symptoms of DE using the five-item Eating Disturbance Screening (EDS-5) questionnaire comprised the independent variable. Covariates included sex, age, socioeconomic status, and BMI. We used regression analyses for associations between DE symptoms and sports participation, including the interaction between DE and BMI. RESULTS: Boys had higher team sports participation compared with girls. Individual and team sports participation varied significantly across BMI levels for each sex. Symptoms of DE were negatively associated with team sports participation (odds ratio [OR] = 0.90, p < 0.001), and were not significantly associated with individual sports participation. BMI scores moderated the association between DE symptoms and individual sports participation (p < 0.005). DE symptoms were associated with higher individual sports participation among individuals with low BMI, and with lower participation among those with high BMI. CONCLUSIONS: DE symptoms are important correlates of sports participation among adolescents, but the direction of these associations partly differs across the weight spectrum. Promotion of factors that counteract DE is needed alongside efforts to increase physical activity and sports participation in the general adolescent population.

Divorce and adolescent academic achievement: Heterogeneity in the associations by parental education.

BACKGROUND: The link between parental divorce and adolescents' academic achievement may depend on parental educational levels. However, findings have been inconsistent regarding whether the negative associations between parental divorce and adolescents' academic outcomes are greater or smaller in highly educated families. The present study aimed to investigate the possible heterogeneity in the associations between divorce and adolescents' academic achievement by parental educational levels, within the context of the elaborate Norwegian welfare state. METHODS: The population-based cross-sectional youth@hordaland study of adolescents aged 16-19 years conducted in Norway in 2012, provided information about parental divorce and was linked to national administrative registries (N = 9,166) to obtain high-quality, objective data on the adolescents' grade point average (GPA), and their parents' educational qualifications and income. RESULTS: The negative association between parental divorce and GPA was stronger among adolescents with educated or highly educated parents compared to adolescents with less educated parents. This heterogeneity was driven by maternal educational qualifications, whereby divorce was more strongly and negatively associated with GPA among adolescents with educated mothers compared to those with less educated mothers, independent of paternal educational levels and income measures. CONCLUSIONS: Among adolescents whose parents have low educational qualifications, parental divorce is not associated with their academic achievement. Educated divorced mothers appear less likely to transfer their educational advantages onto their children than nondivorced equally educated mothers, perhaps due to a "double-burden" regarding work pressure and child-rearing responsibilities. There is a need for future studies to detail the mechanisms underlying this finding.