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Background: Movement behaviors (i.e., physical activity [PA], sedentary behaviors [SB], sleep) relate to mental health. Although movement behaviors are often analyzed as distinct entities, they are in fact highly inter‐dependent (e.g., if an individual increases sleep, then PA and/or SB must be reduced) and these dependencies should be accounted for in the analysis. We tested whether perceptions of time spent in movement behaviors (i.e., moderate‐to‐vigorous intensity PA [MVPA], light physical activity [LPA], SB, and sleep) related to depressive symptoms and self‐report mental health in young adults using a compositional analysis. We then estimated change in depressive symptoms with reallocation of time across movement behaviors using compositional time‐reallocation models. Methods: Data were drawn from the longitudinal NDIT dataset. Complete data were available for 770 young adults (Mage = 20.3, 55% females). Results: The proportion of time spent in MVPA relative to other movement behaviors related to depressive symptoms non‐significantly and to mental health significantly. Reallocating 15 min from MVPA to SB resulted in a significant (0.46 unit) increase in depressive symptoms, and reallocating 15 min of MVPA to LPA was associated with a (0.57) increase in depressive symptoms. Conclusion: These results indicate the importance of relative time spent in each movement behavior to mental health. Further research should examine these associations over time. [ABSTRACT FROM AUTHOR]

Background: The context in which school‐based health‐promoting interventions are implemented is key for the delivery and success of these interventions. However, little is known about whether school culture differs by school deprivation. Methods: Using data from PromeSS, a cross‐sectional study of 161 elementary schools in Québec, Canada, we drew from the Health Promoting Schools theoretical framework to develop four measures of health‐promoting school culture (i.e., school physical environment, school/teacher commitment to student health, parent/community engagement with the school, ease of principal leadership) using exploratory factor analysis. One‐way ANOVA with post‐hoc Tukey‐Kramer analyses was used to examine associations between each measure and social and material deprivation in the school neighborhood. Results: Factor loadings supported the content of the school culture measures and Cronbach's alpha indicated good reliability (range: 0.68‐0.77). As social deprivation in the school neighborhood increased, scores for both school/teacher commitment to student health and parent/community engagement with the school decreased. Implications for School Health Policy, Practice, and Equity: Implementation of health‐promoting interventions in schools located in socially deprived neighborhoods may require adapted strategies to address challenges related to staff commitment and parental and community involvement. Conclusion: The measures developed herein can be used to investigate school culture and interventions for health equity. [ABSTRACT FROM AUTHOR]

Introduction: We examined the mediating role of friends smoking in the association between depressive symptoms and daily/weekly cigarette smoking from adolescence into adulthood.Methods: Data were drawn from the Nicotine Dependence In Teens study (NDIT, Canada) and the Avon Longitudinal Study of Parents and Children (ALSPAC, UK) studies. Three age groups were investigated in NDIT: age 13-14 (n = 1189), 15-16 (n = 1107), and 17-18 (n = 1075), and one in ALSPAC (n = 4482, age 18-21). Multivariable mediation models decomposed the total effect (TE) of depressive symptoms on smoking into a natural direct effect (NDE) and natural indirect effect (NIE) through friends smoking.Results: The odds ratios (ORs) for the TE were relatively constant over time with estimates ranging from 1.12 to 1.35. Friends smoking mediated the association between depressive symptoms and smoking in the two youngest samples (OR [95% confidence interval [CI] 1.09 [1.01,1.17] in 13- to 14-year-olds; 1.10 [1.03,1.18] in 15- to 16-year-olds). In the two older samples, NDE of depressive symptoms was close to the TE, suggestive that mediation was absent or too small to detect.Conclusion: Friends smoking mediates the association between depressive symptoms and daily/weekly cigarette smoking in young adolescents.Implications: If young adolescents use cigarettes to self-medicate depressive symptoms, then interventions targeting smoking that ignore depressive symptoms may be ineffective. Our results also underscore the importance of the influence of friends in younger adolescents, suggestive that preventive intervention should target the social environment, including social relationships. [ABSTRACT FROM AUTHOR]

Despite limited evidence on the association between physical activity (PA) and blood pressure (BP) in youth, experts recommend that adolescents engage regularly in moderate-to-vigorous PA. We examined the relationships between PA intensity and frequency and the likelihood of having high BP in a population-based cohort of adolescents from Montréal, Canada. PA was self-reported every 3 months from grade 7 to 11, and BP was measured at ages 12.8, 15.2, and 17.0 years on average. We analyzed data from 993 participants (mean [SD] age = 16.0 [1.0], 51.6% female) with BP data at ages 15.2 and/or 17.0 years, using pooled ordinal logistic regression. BP (normal/elevated/hypertensive range) was the outcome, and past-year PA intensity and frequency were potential predictors. Eight percent of participants had elevated BP (120-129/<80), and 3.2% had BP in the hypertensive range (≥130/≥80). Participants engaged in a median (interquartile range) of 7.0 (4.5, 9.3) and 5.5 (2, 10.8) moderate and vigorous PA sessions/week, respectively. After adjusting for age, sex, mother's education, use of alcohol and cigarette consumption, engaging in PA more intense than light during the previous year was associated with a lower odds of having BP in the hypertensive range (ORs [95% CIs] = 0.93 [0.88, 0.97] to 0.97 [0.94, 0.99]). The relationships were not altered by adjusting for BMI. Our findings support recommendations that adolescents engage in at least moderate PA on a regular basis to prevent development of BP in the hypertensive range. [ABSTRACT FROM AUTHOR]

Introduction: We investigated whether secondhand smoke (SHS) exposure is associated with depressive symptoms in a population-based sample of children.Methods: Never-smoking students from 29 French-language elementary schools in Greater Montréal, Canada, were followed from 5th to 11th grade (2005-2011) in five waves: 1 (5th grade), 2 (spring 6th grade), 3 (7th grade), 4 (9th grade), and 5 (11th grade). Associations between depressive symptoms and SHS exposure at home and in cars were examined in cross-sectional and longitudinal gamma generalized regression models adjusted for sex, maternal education, and neighborhood socioeconomic status.Results: The sample comprised 1553 baseline never-smokers (mean [SD] age = 10.7 [0.5] years; 44% male; 89% French-speaking). SHS exposure at home and in cars was associated with higher depressive symptom scores in cross-sectional analyses pooled across grades and adjusted for demographics (B [95% confidence interval (CI)] = 0.041 [0.017 to 0.068] for home exposure; 0.057 [0.030 to 0.084] for car exposure). In longitudinal analyses from fifth to sixth grade, B (95% CI), adjusted for demographics and baseline depressive symptoms, was 0.042 (0.003 to 0.080) for home exposure and 0.061 (0.019 to 0.103) for car exposure. From sixth to seventh grade, B (95% CI) was 0.057 (0.003 to 0.110) for home exposure and 0.074 (0.015 to 0.133) for car exposure. SHS exposure at any age did not predict depressive symptoms 2 years later.Conclusions: SHS exposure is associated with depressive symptoms in young persons, both concurrently and 1 year later. This finding adds to the evidence base supporting that children should be protected from SHS exposure.Implications: SHS exposure has deleterious effects on physical health and results of this study raise concerns that such exposure might also affect the mental health of young persons. Clearly, protecting children from SHS in all locations is a critical public health priority. Although research is needed to determine if the association between SHS exposure and depressive symptoms is causal, continued implementation of smoking bans and educational efforts to discourage smoking in vehicles when children are present are warranted. [ABSTRACT FROM AUTHOR]

The objective of the study was to assess the prevalence of obesity and/or undernutrition and evaluate diet and activity patterns among schoolchildren from an ethnically diverse low income urban population. A cross-sectional survey of 498 children aged 9-12 y from 24 schools in low income multiethnic neighborhoods in Montreal, Canada was undertaken. Height, weight, dietary intake, physical activity record, and lifestyle and demographic characteristics were measured. There was no evidence of undernutrition because linear growth was appropriate for age, but 39.4% of children were overweight (>85th percentile NHANES II). Dietary fat intake was higher in children from single-parent families (P < 0.001) and those with mothers born in Canada. Intake of vitamins A, C, iron and folate was directly related to income sufficiency. Children who did more physical activity had significantly higher intakes of energy, calcium, iron, zinc and fiber but were not heavier. Dietary intake was systematically underreported among overweight children, i.e., their reported intakes did not meet calculated energy needs. This underreporting makes it difficult to attribute the accumulated energy imbalance to either energy intake or expenditure. [ABSTRACT FROM AUTHOR]

Purpose: To study the effect of maternal psychiatric disorders (depression, anxiety disorder, bipolar disease, schizophrenia, unspecified psychiatric disorder, and comorbid conditions) and odds of preterm birth.Methods: The Consortium on Safe Labor (2002-2008), an observational cohort with 12 centers from across the United States included 223,394 singleton pregnancies with clinical data obtained from electronic medical records and maternal diagnoses of psychiatric disorders from maternal discharge summaries. Length of gestation was based on the best clinical estimate and categorized as birth less than 39, less than 37, less than 34, and less than 28 weeks' gestation. The adjusted odds ratios (ORs) with 95% confidence intervals of birth were estimated by logistic regression with generalized estimating equations.Results: Any maternal psychiatric disorder was associated with odds of birth less than 39 weeks' gestation (odds ratio [OR] = 1.32, 95% confidence interval = 1.28-1.37), less than 37 weeks' gestation (OR = 1.45, 1.38-1.52), less than 34 weeks' gestation (OR = 1.47, 1.35-1.59), and less than 28 weeks' gestation (OR = 1.57, 1.36-1.82). Specifically, odds of birth less than 37 weeks' gestation were associated with maternal depression (OR = 1.31, 1.23-1.40), anxiety disorder (OR = 1.68, 1.41-2.01), depression with anxiety disorder (OR = 2.31, 1.93-2.78), bipolar disease (OR = 1.54, 1.22-1.94), bipolar disease with depression and/or anxiety disorder (OR = 1.70, 1.30-2.22), and unspecified psychiatric disorder (OR = 1.52, 1.41-1.64).Conclusions: Maternal psychiatric disorders, especially comorbid psychiatric conditions, were associated with increased likelihood of preterm birth. [ABSTRACT FROM AUTHOR]

Because there are few proven smoking cessation approaches for young adults, it is critical to consider the potential of e-cigarettes as an option. Evidence from 2012 to 2013 in the United States (U.S.) suggested that current e-cigarette use was associated with a higher probability of daily smoking and a lower probability of quitting among young adults. This study examines the associations between e-cigarette use frequency and cigarette smoking in more recent data. Data on e-cigarette use were available for 32,656 current smokers and 9,565 past-year quitters ages 18-34 in the 2016-2018 U.S. Behavioral Risk Factor Surveillance System. Participants were categorized as "daily", "non-daily", "former", or "never" e-cigarette users. Adjusted prevalence ratios were estimated to test the associations between e-cigarette use and each of daily smoking and past-year cessation. With e-cigarette never-users as the reference: 1) daily e-cigarette users were 30% (95%CI 0.61-0.79) less likely to be daily smokers; non-daily and former e-cigarette users were 8% (95%CI 1.02-1.15) and 16% (95%CI 1.11-1.21) more likely to be daily smokers, respectively; 2) daily e-cigarette users were 54% (95%CI 1.38-1.73) more likely to have quit in the past year; non-daily and former e-cigarette users were 50% (95%CI 0.42-0.59) and 21% (95%CI 0.73-0.86) less likely to have quit in the past year, respectively. The findings suggest that non-daily e-cigarette use was associated with greater frequency of smoking and less quitting whereas daily e-cigarette use was associated with a lower frequency of smoking and more quitting among young adults in 2016-18. [ABSTRACT FROM AUTHOR]

Background: Cannabis users who mix tobacco with cannabis are exposed to nicotine in the tobacco. We identified characteristics of young adult cannabis users who mix and investigated whether mixing frequency is associated with nicotine dependence (ND).Methods: Data were collected in self-report questionnaires in 2017-20 from 788 young adults (44% male; mean (SD) age 30.6 (1.0) years) participating in a longitudinal investigation of the natural course of ND. Using multivariable logistic regression, we assessed whether any of 16 sociodemographic, lifestyle, psychosocial or other characteristics were associated with mixing among 313 past-year cannabis users. We also assessed whether mixing frequency was associated with ND among 289 past-year cannabis users who had ever smoked cigarettes controlling for age, sex, and other sources of nicotine (i.e., number of cigarettes smoked, other tobacco products, second-hand smoke exposure).Results: Of 788 participants, 40 % (n = 313) reported past-year cannabis use. Of these, 150 (48 %) reported mixing. Younger age, lower education and income, past-year cigarette use, use of other tobacco products and illicit drugs, poor coping skills and gambling were associated with mixing. Number of ICD-10 ND criteria endorsed was associated with mixing < weekly (b(95 % CI) = 0.3(0.02,0.7)) and weekly/daily (0.5(0.1,0.9)) after controlling for other sources of nicotine.Conclusion: Mixing is associated with ND and therefore may threaten tobacco control efforts by rendering quitting cigarette smoking more difficult among smokers who mix tobacco with cannabis. Mixing tobacco with cannabis should be considered as an additional source of nicotine exposure in studies of ND in young people. [ABSTRACT FROM AUTHOR]