The 5-year longitudinal diagnostic profile and health services utilization of patients treated with electroconvulsive therapy in Quebec: a population-based study.

PURPOSE: Electroconvulsive therapy (ECT) is effective for treating several psychiatric disorders. However, only a minority of patients are treated with ECT. It is of primary importance to characterize their profile for epidemiological purposes and to inform clinical practice. We aimed to characterize the longitudinal profile of psychopathology and services utilization of patients first treated with ECT. METHODS: We conducted a population-based comparative study using data from a national administrative database in Quebec. Patients who received a first ECT between 2002 and 2016 were compared to controls who were hospitalized in psychiatry but did not receive ECT. We performed descriptive analyses to compare psychiatric diagnoses, domains of psychopathology (internalizing, externalizing and thought/psychotic disorders), medical services and medication use in the 5 years prior to the ECT or hospitalization. RESULTS: 5 080 ECT patients were compared with 179 594 controls. Depressive, anxiety, bipolar and psychotic disorders were more frequent in the ECT group. 96.2% of ECT patients had been diagnosed with depression and 53.8% with a primary psychotic disorder. In the ECT group, 1.0% had been diagnosed exclusively with depression and 47.0% had disorders from that belong to all three domains of psychopathology. Having both internalizing and thought/psychotic disorders was associated with an increased likelihood of receiving ECT vs having internalizing disorders alone (unadjusted OR = 2.93; 95% CI = 2.63, 3.26). All indicators of mental health services utilization showed higher use among ECT patients. CONCLUSION: Our results provide robust evidence of complex longitudinal psychopathology and extensive services utilization among ECT patients.

System dynamics models of depression at the population level: a scoping review.

AIMS: Depression is a disease driven by dynamic processes both at the individual- and system-level. System dynamics (SD) models are a useful tool to capture this complexity, project the future prevalence of depression and understand the potential impact of interventions and policies. SD models have been used to model infectious and chronic disease, but rarely applied to mental health. This scoping review aimed to identify population-based SD models of depression and report on their modelling strategies and applications to policy and decision-making to inform research in this emergent field. METHODS: We searched articles in MEDLINE, Embase, PsychInfo, Scopus, MedXriv, and abstracts from the System Dynamics Society from inception to October 20, 2021 for studies of population-level SD models of depression. We extracted data on model purpose, elements of SD models, results, and interventions, and assessed the quality of reporting. RESULTS: We identified 1899 records and found four studies that met the inclusion criteria. Studies used SD models to assess various system-level processes and interventions, including the impact of antidepressant use on population-level depression in Canada; the impact of recall error on lifetime estimates of depression in the USA; smoking-related outcomes among adults with and without depression in the USA; and the impact of increasing depression incidence and counselling rates on depression in Zimbabwe. Studies included diverse stocks and flows for depression severity, recurrence, and remittance, but all models included flows for incidence and recurrence of depression. Feedback loops were also present in all models. Three studies provided sufficient information for replicability. CONCLUSIONS: The review highlights the usefulness of SD models to model the dynamics of population-level depression and inform policy and decision-making. These results can help guide future applications of SD models to depression at the population-level.

The mental health of young people who are not in education, employment, or training: a systematic review and meta-analysis.

PURPOSE: There are increasing concerns about the intersection between NEET (not in education, employment, or training) status and youth mental ill-health and substance use. However, findings are inconsistent and differ across types of problems. This is the first systematic review and meta-analysis (PROSPERO-CRD42018087446) on the association between NEET status and youth mental health and substance use problems. METHODS: We searched Medline, EMBASE, Web of Science, ERIC, PsycINFO, and ProQuest Dissertations and Theses (1999-2020). Two reviewers extracted data and appraised study quality using a modified Newcastle-Ottawa Scale. We ran robust variance estimation random-effects models for associations between NEET and aggregate groups of mental ill-health and substance use measures; conventional random-effects models for associations with individual mental/substance use problems; and subgroup analyses to explore heterogeneity. RESULTS: We identified 24 studies from 6,120 references. NEET status was associated with aggregate groups of mental ill-health (OR 1.28, CI 1.06-1.54), substance use problems (OR 1.43, CI 1.08-1.89), and combined mental ill-health and substance use measures (OR 1.38, CI 1.15-1.64). Each disaggregated measure was associated with NEET status [mood (OR 1.43, CI 1.21-1.70), anxiety (OR 1.55, CI 1.07-2.24), behaviour problems (OR 1.49, CI 1.21-1.85), alcohol use (OR 1.28, CI 1.24-1.46), cannabis use (OR 1.62, CI 1.07-2.46), drug use (OR 1.99, CI 1.19-3.31), suicidality (OR 2.84, CI 2.04-3.95); and psychological distress (OR 1.10, CI 1.01-1.21)]. Longitudinal data indicated that aggregate measures of mental health problems and of mental health and substance use problems (combined) predicted being NEET later, while evidence for the inverse relationship was equivocal and sparse. CONCLUSION: Our review provides evidence for meaningful, significant associations between youth mental health and substance use problems and being NEET. We, therefore, advocate for mental ill-health prevention and early intervention and integrating vocational supports in youth mental healthcare.

Social inequalities in availability of health-promoting interventions in Québec elementary schools.

Availability of health-promoting interventions (HPIs) may vary across schools serving students with different socioeconomic backgrounds. Our objectives were to describe social inequalities across elementary schools in: (i) level of importance that school principals attribute to 13 common health-related issues among students in their school; (ii) availability of HPIs within their school addressing eight health topics and (iii) (mis)alignment between perceived importance and HPI availability. Data were collected in telephone interviews with school principals in a convenience sample of 171 elementary schools (59% of 291 schools contacted). Schools were categorized as serving very advantaged, moderately advantaged or disadvantaged students. Principals reported how important 13 health issues were among students in their schools and provided data on HPI availability for 8 health issues, 4 of which required school action under government mandates. Higher proportions of principals in schools serving disadvantaged students (36% of all 171 schools) perceived most health issues as important. The mean number of HPIs in the past year was 12.0, 12.1 and 11.7 in schools serving very advantaged, moderately advantaged and disadvantaged students, respectively. Only availability of mental health HPIs differed by school deprivation (60, 43 and 30% in very, moderately and disadvantaged, respectively). Although most schools offered oral health HPIs, dental problems were not perceived as important. Smoking was perceived as not important and smoking-related HPIs were relatively rare (9%). Given rapid evolution in public health priorities, (mis)alignment between perceived importance of specific health issues and HPI availability in elementary schools warrants ongoing reflection.

Interventions that promote health may not be present in all schools. Our objectives were to describe differences across elementary schools in: (i) level of importance that school principals attribute to common health-related issues among students in their own school; (ii) the presence of interventions that address these health issues and (iii) (mis)alignment between perceived importance and presence of interventions. Telephone interviews were conducted with school principals in 171 elementary schools serving very advantaged, moderately advantaged or disadvantaged students. Principals reported how important 13 health-related issues (four of which required school action under government mandates) were among students in their schools and whether interventions were present for 8 of the 13 issues. Higher proportions of principals in schools serving disadvantaged students perceived most health issues as important. Intervention availability did not differ across schools, except that higher proportions of schools serving advantaged students reported mental health interventions. Most schools offered oral health interventions, but dental problems were not perceived as important. Smoking was also not perceived as important and interventions were relatively rare. (Mis)alignment between perceived importance of health issues and intervention availability calls for ongoing reflection.

Adolescent social media use and its association with relationships and connections: Canadian Health Behaviour in School-aged Children, 2017/2018.

Background: The development of healthy relationships and connections is of fundamental importance to adolescent well-being. The use of social media plays a vital role in the lives of young Canadians, yet the association between different types of social media use and the quality of relationships and connections remains unknown, and most existing analyses on this topic are based on modest and non-representative samples. Data and methods: Using 2017/2018 reports from the nationally representative Health Behaviour in School-aged Children study (n=17,149; ages 11 to 15 years), the strength, consistency and significance of associations was examined between intensive (frequent use to connect with other people) and problematic (use that depicts addictive qualities) social media use and available measures of adolescent relationships and connections. Results: Overall, intensive use (online communication with others almost all of the time) and problematic use (potential addiction to social media) were more common in girls than boys (38% of girls versus 30% of boys and 7.7% of girls versus 5.2% of boys, respectively), with prevalence levels that rose with age. Intensive use was associated with more positive social relationships with friends, especially among girls (relative risk [RR] = 1.40 [95% confidence interval (CI) 1.28 - 1.54]), while problematic use was consistently and negatively associated with strong relationships and connections in all groups in the study. Notably, problematic use was negatively associated with strong family relationships in boys (RR = 0.58 [95% CI 0.42 to 0.79]) and girls (RR=0.48 [95% CI 0.36 to 0.63]). Interpretation: Intensive use of social media has the potential to strengthen relationships and connections in adolescents. However, when social media use becomes addictive or "problematic", it is highly correlated with weaker relationships and a sense of social disconnection. Public health initiatives related to social media use should consider how different types of social media use have the potential to impact on different aspects of health.

Socioeconomic inequalities in adolescent health complaints: A multilevel latent class analysis in 45 countries.

Our study evaluated the relationship between adolescent health complaints and socioeconomic position in 45 countries. Data are from the 2017/2018 international Health Behaviour in School-aged Children survey which used proportionate sampling among adolescents aged 11 to 15 years old (n=228,979). Multilevel, multinomial regression analysis assessed the association between the multilevel latent classes with socioeconomic status (SES; at the household and country level). Three distinct latent classes were identified: No Complaints, Psychological Complaints, and a Physical and Psychological Complaints class; where, low household SES was highest for the physical and psychological complaints class. The findings suggest that health promotion policies and interventions among adolescents should consider the specific needs of adolescents living with low household SES as they report more subjective health complaints.

Sex differences in the association between maternal depression and child and adolescent cognitive development: a systematic review and meta-analysis.

BACKGROUND: Maternal depression is negatively associated with cognitive development across childhood and adolescence, with mixed evidence on whether this association differs in boys and girls. Herein, we performed a systematic review and meta-analysis of sex-specific estimates of the association between maternal depression and offspring cognitive outcomes. METHOD: Seven databases (PubMed, EMBASE, PsycINFO, ERIC, CINAHL, Scopus, ProQuest) were searched for studies examining the longitudinal association between maternal depression and offspring (up to 18 years) cognitive outcomes. Studies were screened and included based on predetermined criteria by two independent reviewers (Cohen's κ = 0.76). We used random-effects models to conduct a meta-analysis and used meta-regression for subgroup analyses. The PROSPERO record for the study is CRD42020161001. RESULTS: Twelve studies met inclusion criteria. Maternal depression was associated with poorer cognitive outcomes in boys [Hedges' g = -0.36 (95% CI -0.60 to -0.11)], but not in girls [-0.17 (-0.41 to 0.07)]. The association in boys varied as a function of the measure of depression used (b = -0.70, p = 0.005): when maternal depression was assessed via a diagnostic interview, boys [-0.84 (-1.23 to -0.44)] had poorer cognitive outcomes than when a rating scale was used [-0.16 (-0.36 to 0.04)]. CONCLUSIONS: This review and meta-analysis indicates that maternal depression is only significantly associated with cognitive outcomes in boys. Understanding the role of sex differences in the underlying mechanisms of this association can inform the development of targeted interventions to mitigate the negative effects of maternal depression on offspring cognitive outcomes.

Maternal Education in Early Life and Risk of Metabolic Syndrome in Young Adult American Females and Males: Disentangling Life Course Processes Through Causal Models.

BACKGROUND: Maternal education in a child's early life may directly affect the child's adult cardiometabolic health, but this is difficult to disentangle from biological, social, and behavioral life course processes that are associated with maternal education. These processes may also differ between males and females. METHODS: Using data from the National Longitudinal Study of Adolescent to Adult Health (1995-2009) (N = 4,026 females and 3,192 males), we estimated sex-stratified associations between maternal attainment of less than high school (

Teenage night owls or early birds? Chronotype and the mental health of adolescents.

Evidence suggests that the timing of sleep (chronotype) impacts mental health in young people, but previous studies have not accounted for sleep duration or school start time in this association, or examined a broad range of mental outcomes. In this study, we investigated the association between chronotype and mental health in a representative sample of adolescents from the 2014 Canadian Health Behaviour in School-Aged Children survey (29,635 students, 362 schools). We examined positive and negative aspects of mental health, using scores for emotional problems (range 0-33), emotional well-being (0-22), behavioural problems (0-28) and prosocial behaviours (0-25). We estimated chronotype using the time of mid-sleep on weekends and examined the associations using multilevel regressions, adjusted for sleep duration, school start time, individual, family and geographic characteristics. The average time of mid-sleep (chronotype) was 04:11 hr. An hour delay in mid-sleep time was associated with more emotional problems (0.34 [95% confidence interval 0.23, 0.45] point higher score), more behavioural problems (2.0% [95% confidence interval 1.4%, 2.6%] higher score), less emotional well-being (0.19 [95% confidence interval 0.09, 0.20] point lower score), and fewer prosocial behaviours (0.18 [95% confidence interval 0.08, 0.29] point lower score). A later chronotype was associated with poorer mental health, independent of sleep duration and school start time, and across internalizing and externalizing mental health domains. Further research is needed to clarify the mechanisms underlying this association. The timing of sleep, and not just its duration, may be an additional consideration for youth mental health.

Education disparities in young people with and without neurodisabilities.

AIM: To examine key outcomes in the education of young people with and without neurodisabilities, and to investigate additional disparities in educational achievement in relation to socio-economic background. METHOD: Data were collected on 2488 Canadian children (age range 10-11y) in 1994 and 1995 from the National Longitudinal Survey of Children and Youth whom were followed for 14 years. We performed separate, discrete-time survival analysis to investigate the effects of having a neurodisability on high school completion, enrolment in post-secondary education (PSE), and PSE completion. RESULTS: The baseline prevalence of neurodisabilities was 12%. Fewer children with neurodisabilities completed high school or enrolled in PSE, compared to children without neurodisabilities, irrespective of parental education. The likelihood that students with neurodisabilities completed PSE differed according to their parents' education: students with neurodisabilities living in less-educated families were about half as likely to complete PSE themselves. INTERPRETATION: Children with neurodisabilities receive less education than children without neurodisabilities. Children from families with low educational attainment appear to be particularly vulnerable. WHAT THIS PAPER ADDS: Twelve per cent of children in Canada aged 10 years to 11 years have a neurodisability. High school completion rate was 70% for children with neurodisabilities versus 94% for children without neurodisabilities. Children with neurodisabilities from less-educated families are particularly vulnerable to lower educational achievement.

The Mental Health of Young Canadians Who Are Not Working or in School.

OBJECTIVE: Recent studies suggest that youth who have a mental health problem are more likely to be NEET-not in education, employment, or training-but findings remain mixed, and evidence from Canada is limited. We examined this association across a range of mental and substance disorders in a representative sample of Canadian youth. METHOD: Data were from the 2012 Canadian Community Health Survey-Mental Health ( n = 5622; ages 15-29). The survey identified past-year mental (depression, bipolar, generalized anxiety) and substance (alcohol, cannabis, other drugs) disorders from a structured interview and included questions on suicidal ideation. We classified as NEET respondents who were not in school or employed in the past week. Logistic regression models tested the associations between mental and substance disorders and NEET status, adjusted for sociodemographic, health, and geographic variables. RESULTS: About 10% of youth were NEET. Being NEET was associated with past-year depression (odds ratio [OR] = 1.67; 95% confidence interval [CI], 1.06 to 2.63); bipolar (OR = 2.31; 95% CI, 0.98 to 5.45), generalized anxiety (OR = 2.65; 95% CI, 1.37 to 5.12), and drug use (OR = 3.22; 95% CI, 1.33 to 7.76) disorders; and suicidal ideation (OR = 1.75; 95% CI, 0.99 to 3.09) but was not associated with alcohol (OR = 1.03; 95% CI, 0.63 to 1.69) or cannabis (OR = 0.97; 95% CI, 0.47 to 2.00) disorders. CONCLUSIONS: Poor mental health was associated with being NEET in Canadian youth. Efforts targeting NEET should include provisions for mental health. Moreover, youth mental health initiatives should consider educational and employment outcomes. Further longitudinal and intervention studies are warranted.

Does the density of the health workforce predict adolescent health? A cross-sectional, multilevel study of 38 countries.

BACKGROUND: Scant evidence exists on the relation between the availability of health professionals and adolescent health, and whether the size of the health workforce equally benefits adolescents across socioeconomic strata. METHODS: We conducted a cross-sectional analysis of adolescent health in 38 countries. Data from 218 790 adolescents were drawn from the 2013/2014 Health Behavior in School-aged Children survey. We used multilevel regression analyses to examine the association between the density of the health workforce and psychosomatic and mental health symptoms with differences in country wealth and income inequality controlled. RESULTS: A higher density of psychologists was associated with better self-reported mental health in adolescents (P = 0.047); however, this finding was not robust to sensitivity analyses. The densities of physicians and psychiatrists were not significantly associated with better adolescent psychosomatic or mental health. Cross-level interactions between the health workforce and socioeconomic status did not relate to health, indicating that larger health workforces did not reduce socioeconomic differences in adolescent health. CONCLUSIONS: This study found that adolescents in countries with a higher density of health providers do not report better psychosomatic or mental health. Other social or structural factors may play larger roles in adolescent health.

A NEET distinction: youths not in employment, education or training follow different pathways to illness and care in psychosis.

PURPOSE: The early phases of psychosis, including the prodrome, often feature educational/occupational difficulties and various symptoms and signs, that can render or keep youths "Not in Employment, Education or Training" (NEET). Conversely, NEET status itself may increase risk for illness progression and impaired functioning, and impede access to appropriate services for psychosis. As these issues have not been investigated, we aimed to examine differences in the illness and care pathways and characteristics of youths with psychosis who are NEET and non-NEET. METHODS: Youths entering a catchment-based Canadian early intervention service for psychosis (N = 416) were assessed as being NEET or non-NEET and compared on symptomatology, premorbid adjustment, prodrome and duration of untreated psychosis (DUP). RESULTS: Thirty-nine percent of the sample was NEET. Compared to non-NEET youths, NEET youths had 34% higher negative symptoms scores, longer prodromes (median of 52 weeks vs. 24 weeks), and were more often continuously ill after their first psychiatric change until the onset of psychosis (62% vs. 45%). Both groups had similar premorbid adjustment scores until late adolescence when scores were significantly worse for NEET youths. Accounting for other predictors, NEET youths had 23% longer DUPs on average, despite having made more help-seeking attempts. CONCLUSIONS: Despite being more narrowly defined, NEET status was thrice as prevalent in our sample as in the Canadian population. The NEET group followed a distinct trajectory of persistent symptoms and functional decline before presenting with a psychotic disorder. The systemic delays that NEET youths encountered indicate a need for better-targeted early identification efforts.

Non-line-of-sight tracking of people at long range.

A remote-sensing system that can determine the position of hidden objects has applications in many critical real-life scenarios, such as search and rescue missions and safe autonomous driving. Previous work has shown the ability to range and image objects hidden from the direct line of sight, employing advanced optical imaging technologies aimed at small objects at short range. In this work we demonstrate a long-range tracking system based on single laser illumination and single-pixel single-photon detection. This enables us to track one or more people hidden from view at a stand-off distance of over 50 m. These results pave the way towards next generation LiDAR systems that will reconstruct not only the direct-view scene but also the main elements hidden behind walls or corners.

Psychological and psychosocial interventions for negative symptoms in psychosis: systematic review and meta-analysis.

BackgroundNegative symptoms observed in patients with psychotic disorders undermine quality of life and functioning. Antipsychotic medications have a limited impact. Psychological and psychosocial interventions, with medication, are recommended. However, evidence for the effectiveness of specific non-biological interventions warrants detailed examination.AimsTo conduct a meta-analytic and systematic review of the literature on the effectiveness of non-biological treatments for negative symptoms in psychotic disorders.MethodWe searched for randomised controlled studies of psychological and psychosocial interventions in psychotic disorders that reported outcome on negative symptoms. Standardised mean differences (SMDs) in values of negative symptoms at the end of treatment were calculated across study domains as the main outcome measure.ResultsA total of 95 studies met our criteria and 72 had complete quantitative data. Compared with treatment as usual cognitive-behavioural therapy (pooled SMD -0.34, 95% CI -0.55 to -0.12), skills-based training (pooled SMD -0.44, 95% CI -0.77 to -0.10), exercise (pooled SMD -0.36, 95% CI -0.71 to -0.01), and music treatments (pooled SMD -0.58, 95% CI -0.82 to -0.33) provide significant benefit. Integrated treatment models are effective for early psychosis (SMD -0.38, 95% CI -0.53 to -0.22) as long as the patients remain in treatment. Overall quality of evidence was moderate with a high level of heterogeneity.ConclusionsSpecific psychological and psychosocial interventions have utility in ameliorating negative symptoms in psychosis and should be included in the treatment of negative symptoms. However, more effective treatments for negative symptoms need to be developed.

School start time and sleep in Canadian adolescents.

Insufficient sleep is a serious problem in adolescents and school start time is thought to be a key contributor. This study provided the first comprehensive assessment of school start times across Canada and examined whether school start times were associated with sleep duration and tiredness among adolescents. We collected information on school start times from 362 schools that participated in the 2013/2014 Health Behaviour in School-aged Children study. We calculated sleep duration from weekday bedtime and wake time reported by 29 635 students (aged 10-18 years). We classified weekday sleep as sufficient if it met national recommendations, and used data on self-reported tiredness at school in the morning. Random-effects regression models estimated the association of school start time with sleep duration, sleep sufficiency and tiredness. On average, schools started at 08:43 hours. Students slept an average of 8:36 h on weekdays and 69% met sleep duration recommendations, but 60% reported feeling tired in the morning. Every 10-min delay in school start time corresponded with 3.2 [95% confidence interval (CI): 2.0, 4.5] additional minutes of sleep, a 1.6% (95% CI: 0.5, 2.8) greater probability of sufficient sleep and a 2.1% (95% CI: 1.0, 3.2) smaller probability of feeling tired at school in the morning. Students from schools that started later slept longer, were more likely to meet sleep recommendations and were less likely to report feeling tired in the morning. The study adds weight to the mounting evidence that delaying school start time benefits adolescent sleep.

The impact of child restraint legislation on the incidence of severe paediatric injury in Chile.

BACKGROUND: The objective of this study is to determine the association between Chile's 2005 child restraint legislation (CRL) and the incidence of severe paediatric motor vehicle-related injury. METHODS: We analysed motor vehicle injury data from Chile's Road Safety Commission from 2000 to 2012 to determine the association between Chile's 2005 CRL and severe paediatric injury. Using Poisson time-series models we assessed the effect of the law on two outcome variables: (1) severely injured children per vehicle fleet; and (2) severely injured children per population. RESULTS: Chile's 2005 CRL is significantly associated with a 24% reduction in severely injured children per vehicle, and 19% reduction in severely injured children per population in the 1st year of its enactment. In 2007 this law is also significantly associated with a 17% decrease in severely injured children per vehicle, and with an 11% decrease in severely injured children per population. However, this legislation had a short-term effect since no reductions in severely injured children per vehicle were observed after 2009 and no reductions for severely injured children per population were registered after 2008. CONCLUSIONS: This is the first study to examine the association between CRL and severe paediatric injury in a Latin-American country. This study suggests that Chile's CRL was only effective in the short term. To support this type of reforms in the long term, other measures such as police enforcement, public information campaigns and involvement of public health professionals in educating parents about the benefits of using child restraints should be considered.

Adolescent suicidal behaviours in 32 low- and middle-income countries.

OBJECTIVE: To estimate prevalence of suicidal ideation and suicidal ideation with a plan in each surveyed country and to examine cross-national differences in associated risk factors. METHODS: We analysed data of students aged 13-17 years who participated in the 2003-2012 Global School-based Health Surveys in 32 countries, of which 29 are low- and middle-income. We used random effects meta-analysis to generate regional and overall pooled estimates. Multivariable logistic regression was used to estimate risk ratios for the associated risk factors. Population attributable fractions were estimated based on adjusted risk ratios and the prevalence of the determinants within each exposure level. FINDINGS: Across all countries, the pooled 12-month prevalence of suicide ideation were 16.2% (95% confidence interval, CI: 15.6 to 16.7) among females and 12.2% (95% CI: 11.7 to 12.7) among males and ideation with a plan were 8.3% (95% CI: 7.9 to 8.7) among females and 5.8% (95% CI: 5.5 to 6.1) among males. Suicide ideation in the WHO Region of the Americas was higher in females than males, with an estimated prevalence ratio of 1.70 (95% CI: 1.60 to 1.81), while this ratio was 1.04 (95% CI: 0.98 to 1.10) in the WHO African Region. Factors associated with suicidal ideation in most countries included experiences of bullying and physical violence, loneliness, limited parental support and alcohol and tobacco use. CONCLUSION: The prevalence of adolescent suicidal behaviours varies across countries, yet a consistent set of risk factors of suicidal behaviours emerged across all regions and most countries.

Social support and protection from depression: systematic review of current findings in Western countries.

BACKGROUND: Numerous studies report an association between social support and protection from depression, but no systematic review or meta-analysis exists on this topic. AIMS: To review systematically the characteristics of social support (types and source) associated with protection from depression across life periods (childhood and adolescence; adulthood; older age) and by study design (cross-sectional v cohort studies). METHOD: A systematic literature search conducted in February 2015 yielded 100 eligible studies. Study quality was assessed using a critical appraisal checklist, followed by meta-analyses. RESULTS: Sources of support varied across life periods, with parental support being most important among children and adolescents, whereas adults and older adults relied more on spouses, followed by family and then friends. Significant heterogeneity in social support measurement was noted. Effects were weaker in both magnitude and significance in cohort studies. CONCLUSIONS: Knowledge gaps remain due to social support measurement heterogeneity and to evidence of reverse causality bias.

Trends in Psychological Symptoms among Canadian Adolescents from 2002 to 2014: Gender and Socioeconomic Differences.

OBJECTIVE: To describe trends in psychological health symptoms in Canadian youth from 2002 to 2014 and examine gender and socioeconomic differences in these trends. METHOD: We used data from the Canadian Health Behaviour in School-aged Children (HBSC) study. We assessed psychological symptoms from a validated symptom checklist and calculated a symptom score (range, 0-16). We stratified our analyses by gender and affluence tertile based on an index of material assets. We then plotted trends in symptom score and calculated the probability of experiencing specific symptoms over time. RESULTS: Between 2002 and 2014, psychological symptom score increased by 1.01 (95% confidence interval [CI], 0.73 to 1.41), 1.08 (95% CI, 0.79 to 1.37), and 0.84 (95% CI, 0.55 to 1.13) points in girls in the low-, middle-, and high-affluence tertiles, respectively. In boys, psychological symptoms decreased by -0.39 (95% CI, -0.66 to -0.12) and -0.12 (95% CI, -0.43 to 0.19) points in the high- and middle-affluence tertiles, respectively, and increased by 0.30 (95% CI, -0.04 to 0.63) points in the low-affluence tertile. The probability of feeling anxious and having sleep problems at least once a week notably increased in girls from all affluence groups, while the probability of feeling depressed and irritable decreased among boys from the high-affluence tertile. CONCLUSION: Psychological symptoms increased in Canadian adolescent girls across all affluence groups while they remained stable in boys from low and middle affluence and decreased in boys from high affluence. Specific psychological symptoms followed distinct trends. Further research is needed to uncover the mechanisms driving these trends.