School-level Prevalence Research Articles

Universal Free School Meals Policy and Childhood Obesity.

The Community Eligibility Provision (CEP), a universal free school meals policy, increases school meal participation by allowing schools in low-income areas to provide free breakfast and lunch to all students; however, its impact on obesity remains uncertain. The objective of this study is to estimate the association of CEP with child obesity. School obesity prevalence was calculated using BMI measurements collected annually between 2013 and 2019 from students in California public schools in grades 5, 7, and 9. To estimate the association of CEP with obesity, we used a difference-in-differences approach for staggered policy adoption with an outcome regression model conditional on covariates, weighted by student population size. The analysis included 3531 CEP-eligible schools using school-level obesity prevalence calculated from 3 546 803 BMI measurements. At baseline, on average, 72% of students identified as Hispanic, 11% identified as white, 7% identified as Black, and 80% were eligible for free or reduced-price meals. Baseline obesity prevalence was 25%. Schools that participated in CEP were associated with a 0.60-percentage-point net decrease in obesity prevalence after policy adoption (95% confidence interval: -1.07 to -0.14 percentage points, P = .01) compared with eligible, nonparticipating schools, corresponding with a 2.4% relative reduction, given baseline prevalence. Meals served increased during this period in CEP-participating schools only. In a balanced sample of California schools, CEP participation was associated with a modest net decrease in obesity prevalence compared with eligible, nonparticipating schools. These findings add to the growing literature revealing potential benefits of universal free school meals for children's well-being.

Food Environments Within and Outside of Schools Play a Critical Role in Curtailing the Rise in Obesity among School-Aged Children over Time

BackgroundSound evidence for effective community-based strategies is needed to curtail upward trends in childhood obesity in the United States (US). ObjectivesThe aim of the study was to assess the association between school and community food environments and the prevalence of obesity over time. MethodsData were collected from K–12 schools in 4 low-income New Jersey cities in the US. School-level obesity prevalence, calculated from nurse-measured heights and weights at 4 time points, was used as the outcome variable. Data on the school food environment (SFE) measured the healthfulness of school lunch and competitive food offerings annually. The community food environment (CFE), i.e., the number of different types of food outlets within 400 m of schools, was also captured annually. The count and presence of food outlets likely to be frequented by students were calculated. Exposure to composite environment profiles both within schools and in communities around schools was assessed using latent class analysis. Data from 106 schools were analyzed using multilevel linear regression. ResultsThe prevalence of obesity increased from 25% to 29% over the course of the study. Obesity rates were higher in schools that had nearby access to a greater number of limited-service restaurants and lower in schools with access to small grocery stores and upgraded convenience stores participating in initiatives to improve healthful offerings. Interaction analysis showed that schools that offered unhealthier, competitive foods experienced a faster increase in obesity rates over time. Examining composite food environment exposures, schools with unhealthy SFEs and high-density CFEs experienced a steeper time trend (β = 0.018, P < 0.001) in obesity prevalence compared to schools exposed to healthy SFE and low-density CFEs. ConclusionsFood environments within and outside of schools are associated with differential obesity trajectories over time and can play an important role in curtailing the rising trends in childhood obesity.

Prescription Stimulant Medical and Nonmedical Use Among US Secondary School Students, 2005 to 2020

Recent information on the prevalence of prescription stimulant therapy for attention-deficit/hyperactivity disorder (ADHD) and nonmedical use of prescription stimulants (NUPS) at the school-level among US secondary school students is limited. To investigate the school-level prevalence of and association between stimulant therapy for ADHD and NUPS among US secondary school students. This cross-sectional study used survey data collected between 2005 and 2020 as part of the Monitoring the Future study (data collected annually via self-administered survey in schools from independent cohorts). Participants were from a nationally representative sample of 3284 US secondary schools. The mean (SD) response rates were 89.5% (1.3%) for 8th-grade students, 87.4% (1.1%) for 10th-grade students, and 81.5% (1.8%) for 12th-grade students. Statistical analysis was performed from July to September 2022. Past-year NUPS. The 3284 schools contained 231 141 US 8th-, 10th-, and 12th-grade students (111 864 [50.8%, weighted] female; 27 234 [11.8%, weighted] Black, 37 400 [16.2%, weighted] Hispanic, 122 661 [53.1%, weighted] White, 43 846 [19.0%, weighted] other race and ethnicity). Across US secondary schools, the past-year prevalence of NUPS ranged from 0% to more than 25%. The adjusted odds of an individual engaging in past-year NUPS were higher at secondary schools with higher proportions of students who reported stimulant therapy for ADHD, after controlling for other individual-level and school-level covariates. Students attending schools with the highest rates of prescription stimulant therapy for ADHD had approximately 36% increased odds of past-year NUPS compared with students attending schools with no medical use of prescription stimulants (adjusted odds ratio, 1.36; 95% CI, 1.20-1.55). Other significant school-level risk factors included schools in more recent cohorts (2015-2020), schools with higher proportions of parents with higher levels of education, schools located in non-Northeastern regions, schools located in suburban areas, schools with higher proportion of White students, and schools with medium levels of binge drinking. In this cross-sectional study of US secondary schools, the prevalence of past-year NUPS varied widely, highlighting the need for schools to assess their own students rather than relying solely on regional, state, or national results. The study offered new evidence of an association between a greater proportion of the student body that uses stimulant therapy and a greater risk for NUPS in schools. The association between greater school-level stimulant therapy for ADHD and other school-level risk factors suggests valuable targets for monitoring, risk-reduction strategies, and preventive efforts to reduce NUPS.

School-Level Longitudinal Predictors of Alcohol, Cigarette, and Marijuana Use.

This study analyzed measures aggregated at the school level to identify key predictors of drinking alcohol, binge drinking, smoking cigarettes, and using marijuana. Using data collected from 6th through 12th grade students between 2011 and 2015, we identify school-level variables that predict school-level prevalence in the subsequent year. Data included prior year assessments of: (1) school-wide prevalence, (2) perceived ease of access to drugs, (3) perceived adult disapproval of drug use, (4) perceived peer disapproval of drug use, and (5) perceived prevalence of drug use. We regressed grade-level behaviors on predictor variables from the previous school year. In middle schools, prior grade prevalence and prior grade perceived norms were significant predictors of subsequent grade prevalence. For high schools, prior year prevalence, aggregated peer norms, and perceived ease of access predicted subsequent use. These analyses provide evidence that a school's culture is predictive of changes in prevalence over time.

Effects of Greenness on Myopia Risk and School-Level Myopia Prevalence Among High School–Aged Adolescents: Cross-sectional Study

Myopia is a serious public health issue. High school-aged adolescents in Beijing have an alarming prevalence of myopia. Therefore, determining myopia protective factors is essential. Green space has a certain association with myopia protective factors that can protect against myopia. This study aims to examine the effects of green space around schools on individual myopia risk in high school-aged adolescents and the school-level myopia prevalence. Green space was measured using the normalized difference vegetation index (NDVI). A total of 13,380 samples of 51 high schools were selected from a 2021 Beijing Municipal Health Commission survey. Adolescent myopia was defined as a spherical equivalent of ≤-1.00 diopters in the worse eye. Generalized linear mixed models with a binomial error structure were used to analyze the effects of the NDVI on personal myopia risk and adjust them by other factors, such as demographics, exposure time, and outdoor exercise. The effects of the NDVI on school-level myopia prevalence with adjusted demographics and the relative position factors of trees were analyzed through quasibinomial regression. The overall prevalence of myopia was 80.61% (10,785/13,380, 95% CI 79.93%-81.27%). Although with a 0.1 increase in the 500 and 1000 m buffer NDVIs adjusted by demographic and other factors, the high school-aged personal myopia risk significantly dropped by 16% (odds ratio [OR] 0.84, 95% CI 0.73-0.97) and 12% (OR 0.88, 95% CI 0.79-0.99), respectively. However, only the adjusted 500 m buffer NDVI (by demographics and the position of trees) with a 0.1 increase significantly reduced the school-level myopia prevalence by 15% (OR 0.85, 95% CI 0.74-0.98). Subgroup analysis showed that the adjusted effects of the 500 m buffer NDVI are significant in schoolgirls (OR 0.82, 95% CI 0.72-0.93), juniors (OR 0.82, 95% CI 0.72-0.94), the Han nationality (OR 0.84, 95% CI 0.72-0.97), 1-year exposure (OR 0.84, 95% CI 0.71-0.99) and 3-year exposure (OR 0.78, 95% CI 0.65-0.94). The greenness of a 500 m buffer around schools is associated with a lower personal myopia risk among adolescents and a lower prevalence of myopia in schools. With regard to prevention and control activities, green space within a 500 m buffer around schools is suggested as an independent protective factor for adolescent myopia.

Shifting school health priorities pre-post cannabis legalization in Canada: Ontario secondary school rankings of student substance use as a health-related issue.

This study examined how schools prioritize ten key health concerns among their student populations over time and whether schools' prioritization of alcohol and other drug use (AODU) corresponds to students' substance use behaviours and cannabis legalization as a major policy change. Data were collected from a sample of secondary schools in Ontario, Canada across four years (2015/16-2018/19 [N2015/16 = 65, N2016/17 = 68, N2017/18 = 61 and N2018/19 = 60]) as a part of the COMPASS study. School-level prevalence of cannabis and alcohol use between schools that did and did not prioritize student AODU as a health concern was examined. Ordinal mixed models examined whether student cannabis and alcohol use were associated with school prioritization of AODU. Chi-square tests examined changing health priorities among schools pre-post cannabis legalization. School priority ranking for AODU was mostly stable over time. While AODU was identified as an important health concern, most schools identified mental health as their first priority across the four years of the study. No significant changes to school AODU priorities were observed pre-post cannabis legalization nor was school prioritization of AODU associated with student cannabis and alcohol use behaviours. This study suggests that schools may benefit from guidance in identifying and addressing priority health concerns among their student population.

Measuring school level attributable risk to support school-based HPV vaccination programs

BackgroundIn Australia in 2017, 89% of 15-year-old females and 86% of 15-year-old males had received at least one dose of the HPV vaccine. However, considerable variation in HPV vaccination initiation (dose one) across schools remains. It is important to understand the school-level characteristics most strongly associated with low initiation and their contribution to the overall between-school variation.MethodsA population-based ecological analysis was conducted using school-level data for 2016 on all adolescent students eligible for HPV vaccination in three Australian jurisdictions. We conducted logistic regression to determine school-level factors associated with lower HPV vaccination initiation (< 75% dose 1 uptake) and estimated the population attributable risk (PAR) and the proportion of schools with the factor (school-level prevalence).ResultsThe factors most strongly associated with lower initiation, and their prevalence were; small schools (OR = 9.3, 95%CI = 6.1–14.1; 33% of schools), special education schools (OR = 5.6,95%CI = 3.7–8.5; 8% of schools), higher Indigenous enrolments (OR = 2.7,95% CI:1.9–3.7; 31% of schools), lower attendance rates (OR = 2.6,95%CI = 1.7–3.7; 35% of schools), remote location (OR = 2.6,95%CI = 1.6–4.3; 6% of schools,) and lower socioeconomic area (OR = 1.8,95% CI = 1.3–2.5; 33% of schools). The highest PARs were small schools (PAR = 79%, 95%CI:76–82), higher Indigenous enrolments (PAR = 38%, 95%CI: 31–44) and lower attendance rate (PAR = 37%, 95%CI: 29–46).ConclusionThis analysis suggests that initiatives to support schools that are smaller, with a higher proportion of Indigenous adolescents and lower attendance rates may contribute most to reducing the variation of HPV vaccination uptake observed at a school-level in these jurisdictions. Estimating population-level coverage at the school-level is useful to guide policy and prioritise resourcing to support school-based vaccination programs.

Potential use of antibodies to provide an earlier indication of lymphatic filariasis resurgence in post–mass drug ad ministration surveillance in American Samoa

BackgroundUnder the Global Programme to Eliminate Lymphatic Filariasis (LF), American Samoa conducted 7 rounds of mass drug administration (MDA) between 2000 and 2006. The territory passed transmission assessment surveys (TASs) in 2011 (TAS-1) and 2015 (TAS-2). In 2016, the territory failed TAS-3, indicating resurgence. This study aims to determine if antibodies (Abs) may have provided a timelier indication of LF resurgence in American Samoa. MethodsWe examined school-level antigen (Ag) and Ab status (presence/absence of Ag- and Ab-positive children) and prevalence of single and combined Ab responses to Wb123, Bm14, and Bm33 Ags at each TAS. Pearson chi-square test and logistic regression were used to examine associations between school-level Ab prevalence in TAS-1 and TAS-2 and school-level Ag status in TAS-3. ResultsSchools with higher prevalence of Wb123 Ab in TAS-2 had higher odds of being Ag-positive in TAS-3 (odds ratio [OR] 24.5, 95% confidence interval [CI] 1.2–512.7). Schools that were Ab-positive for WB123 plus Bm14, Bm33, or both Bm14 and Bm33 in TAS-2 had higher odds of being Ag-positive in TAS-3 (OR 16.0–24.5). ConclusionAbs could provide earlier signals of resurgence and enable a timelier response. The promising role of Abs in surveillance after MDA and decision making should be further investigated in other settings.

Schools, Subcultural Values, and the Risk of Youth Violence: The Influence of the Code of the Street among Students in Three U.S. Cities.

Little is known about the role of subcultural values in the development of violence in schools and among school-aged children. Drawing on the "code of the street" thesis, which identifies schools as important staging grounds in the campaign for respect among young people, this study aims to fill this gap in the literature by analyzing student- and school-level associations between projected violence and self-reported subcultural values revolving around toughness and respect. The analytic sample includes N = 1767 students (53.65% female) in grades 7, 8, and 9 (ages 11-17 years, mean = 13.5 years) at 40 middle and high schools in Boston, MA, Denver, CO, and Miami, FL. Consistent with research involving a variety of adolescent and young adult populations, estimates from multilevel negative binomial regression models reveal a robust positive student-level association between personal adherence to subcultural values and projected violence. However, school-level results indicate a compositional, rather than contextual, effect in which higher school-mean levels of projected violence reflect the aggregate values of individual students rather than independent or interactive processes involving the school-level prevalence of code of the street values. Thus, while code of the street values may be important contributors to youth violence, the school setting appears to play a limited role in transmitting their influence among students.

Assessment of Rural-Urban and Geospatial Differences in Perceived Handgun Access and Reported Suicidality Among Youth in Colorado

Suicide is the second leading cause of death in adolescents, with firearms the most common method, especially in rural communities. Identifying where to target lethal means safety interventions could better leverage limited resources. To understand the associations of rurality, school-level prevalence of easy handgun access, and suicidality measures in Colorado youth, to explore spatial distribution of school-level measures, and to identify communities with high prevalence of both easy handgun access and suicidality. This cross-sectional study used data from the 2019 Healthy Kids Colorado Survey, an anonymous cross-sectional school-based survey conducted at 256 participating Colorado high schools. Participants included students from schools recruited for statewide population-based estimates and additional schools opting in. Data were analyzed from November 9, 2020, to March 13, 2021. Urban-centric locale according to a 7-level continuum. Geocoded location of schools was used for spatial analysis. The main outcomes were weighted prevalence for easy handgun access and 4 measures of mental health and suicidality in the previous year (ie, feeling sad for 2 weeks and considering suicide, planning suicide attempt, or attempting suicide in the past year). A total of 59 556 students (49.7% [95% CI, 49.3%-50.1%] male and 50.3% [95% CI, 49.9%-50.7%] female; 53.9% [95% CI, 53.5%-54.3%] in 9th and 10th grade; 36.4% [95% CI, 36.0%-36.8%] Hispanic and 50.8% [95% CI, 50.4%-51.2%] non-Hispanic White) from 256 schools participated. Most schools were rural or in small towns (56.8% [95% CI, 50.7%-62.9%]), while more students participated from urban and suburban schools (57.8% [95% CI, 57.6%-58.0%]). Prevalence of perceived easy access to handguns increased with increasing rurality, with 36.2% (95% CI, 35.2%-37.1%) of students in rural (remote) schools reporting easy access, compared with 18.2% (95% CI, 17.3%-19.1%) for city (large) schools. The spatial distribution of easy handgun access and suicidality measures had minimal overlap, but there was correlation at school-level between easy handgun access and considering suicide (ρ = 0.203 [95% CI, 0.0748-0.331]), planning suicide (ρ = 0.300 [95% CI, 0.173-0.427]), and attempting suicide (ρ = 0.218 [95% CI, 0.0869-0.350) in the previous year. The highest quartile for prevalence of both perceived easy access to handguns and planning suicide in the previous year included 21 schools (81.0% [95% CI, 64.0%-97.9%] rural [remote] or rural [distant]). These findings suggest that rural-remote communities in Colorado may benefit most from interventions focused on limiting youth access to handguns when youth are in crisis, with some communities at especially high risk. Spatially referenced data may improve targeting interventions to where they are needed most.

Statistical Regression Model of Water, Sanitation, and Hygiene; Treatment Coverage; and Environmental Influences on School-Level Soil-Transmitted Helminths and Schistosome Prevalence in Kenya: Secondary Analysis of the National Deworming Program Data.

.According to the Kenya National School-Based Deworming program launched in 2012 and implemented for the first 5 years (2012–2017), the prevalence of soil-transmitted helminths (STH) and schistosomiasis substantially reduced over the mentioned period among the surveyed schools. However, this reduction is heterogeneous. In this study, we aimed to determine the factors associated with the 5-year school-level infection prevalence and relative reduction (RR) in prevalence in Kenya following the implementation of the program. Multiple variables related to treatment, water, sanitation, and hygiene (WASH) and environmental factors were assembled and included in mixed-effects linear regression models to identify key determinants of the school location STH and schistosomiasis prevalence and RR. Reduced prevalence of Ascaris lumbricoides was associated with low (< 1%) baseline prevalence, seven rounds of treatment, high (50–75%) self-reported coverage of household handwashing facility equipped with water and soap, high (20–25°C) land surface temperature, and community population density of 5–10 people per 100 m2. Reduced hookworm prevalence was associated with low (< 1%) baseline prevalence and the presence of a school feeding program. Reduced Trichuris trichiura prevalence was associated with low (< 1%) baseline prevalence. Reduced Schistosoma mansoni prevalence was associated with low (< 1%) baseline prevalence, three treatment rounds, and high (> 75%) reported coverage of a household improved water source. Reduced Schistosoma haematobium was associated with high aridity index. Analysis indicated that a combination of factors, including the number of treatment rounds, multiple related program interventions, community- and school-level WASH, and several environmental factors had a major influence on the school-level infection transmission and reduction.

Medical Use and Misuse of Prescription Opioids in US 12th-Grade Youth: School-Level Correlates.

Opioid misuse and overdose remains a leading US public health concern, and many youth are first exposed to opioids via medical use. In this study, we examine school-level prevalence and correlates of medical use and misuse of prescription opioids among US 12th-grade students. A sample of 228 507 US 12th-graders in 1079 public and private schools from 2002 to 2017 from the Monitoring the Future study was used to identify school-level prevalence and correlates associated with medical use and misuse of prescription opioids. The past-year prevalence of prescription opioid misuse was 7.6% and ranged from 0% to 73% across US high schools. Lifetime medical use of prescription opioids was 16.9% and ranged from 0% to 85% across US high schools. The odds of prescription opioid misuse were higher at schools with higher proportions of male students, more white students, higher rates of marijuana use, and more medical use of prescription opioids. Students attending schools with the highest rates of medical use of prescription opioids had 57% increased odds of past-year prescription opioid misuse compared with schools with no medical use (adjusted odds ratio = 1.57, 95% confidence interval = 1.35-1.83); this association was found to weaken in recent years. Differences exist in the prevalence of prescription opioid misuse among US high schools. The association between greater school-level medical use of prescription opioids and higher prevalence of prescription opioid misuse, although declining, indicates a key risk factor to target for prevention efforts.

School-Level Prevalence and Predictors of e-Cigarette Use in 8th, 10th, and 12th Grade U.S. Youth: Results From a National Survey (2015–2016)

PurposeThe aim of this study was to examine the school-level prevalence and predictors of e-cigarette use among U.S. adolescents. MethodsThe Monitoring the Future study is an annual national cross-sectional study of secondary (middle and high) school students. This study uses 2015 and 2016 survey data from 8th, 10th, and 12th grade students (n = 38,926) attending 580 U.S. public and private secondary schools. E-cigarette use, binge drinking, cigarette smoking, marijuana use, and nonmedical prescription drug use were measured at the individual level. School-level characteristics were measured with both aggregated student-level measures (e.g., school-level e-cigarette use, school-level racial composition) and school characteristics (e.g., public vs. private, urban vs. rural). ResultsThe prevalence of past-month e-cigarette use varied considerably across 580 U.S. middle and high schools, ranging from 0% to 60% at individual schools (mean = 10.2%, standard deviation = 8.9%). Multivariable regression analyses indicated that past-month e-cigarette use was significantly higher at schools with a higher proportion of White students, schools that were located in the U.S. Southern and Western regions, and schools with higher prevalence of past-month cigarette smoking, after controlling for relevant individual- and school-level covariates. ConclusionsE-cigarette use varies considerably across schools, and this study suggests that school context plays an important role in e-cigarette use. Cigarette smoking and e-cigarette use at the school level are closely linked and are important risk factors for individual-level e-cigarette use. The wide variation in prevalence of e-cigarette use highlights the need for schools to work with professionals to obtain school-level assessment rather than relying solely on state or national results to guide prevention efforts.

School and Student Level Prevalence and Predictors of Weapon-Related Behaviors and Experiences Among Secondary Schools in California

Importance: The first study to examine prevalence and correlates of weapon-related behaviors on school ground both on student- and school levels on a large and representative sample of a whole state. Objective: To assess the prevalence of weapon-related behaviors in secondary schools in California, their intercorrelations and predictors on the individual and school levels. Design: Secondary analysis of the California Healthy Kids survey among secondary school students in California in 2013-2015. Setting: Survey conducted in grades 7,9,11 in public schools. Participants: 889,726 students (50.5% females), from 2,641 schools. Outcome(s) and Measure(s): Dependent variables (last year): Carrying a gun in school; carrying another weapon; threatened/injured with weapon; seeing students carrying weapons. Predictors include socio-demographic characteristics of the student and family, school violence involvement (victimization, gang affiliation), and school climate. Results: Prevalence ranged from 3.1% of students carrying gun to 17.9% saw another student with a weapon. In 3.3% of schools i more than 15% of students carry a weapon and in 5.8% of schools, 15% or more were injured/threatened with weapons. Weapon-related behaviors were inter-correlated: proportion of students in school who reported carrying a gun was r=.71 (p<.001) with both the proportion of students who carried other weapons and were threatened/injured. Both student- and school level prevalence were predictable. For students, R2 ranged from 36.9%, threatened/injured to 24.5% seeing a weapon. For schools, R2 ranged from 56.3%, carrying another weapon to 45.7%, seeing a student with a weapon. The strongest predictors are the number of transgender students, gang members, and victimized students, and particularly victimized because of their disability. Conclusions and Relevance: Tens of thousands of students are involved in weapon-related behaviors in schools. Many schools have only few involved students, while few schools have large numbers of students carrying weapons. This is important for prevention public health policies and practices. Funding Statement: None to declare Declaration of Interests: None to declare

The Association Between Smoke-Free School Policies and Adolescents' Perceived Antismoking Norms: Moderation by School Connectedness.

IntroductionMany European schools implement smoke-free school policies (SFSPs). SFSPs may decrease adolescent smoking by causing adolescents to perceive stronger antismoking norms, yet there exists no quantitative evidence that indicates for which norms and for whom such effects may occur. This study therefore assessed to what extent adolescents’ perceived antismoking norms among best friends, teachers, and society at large were associated with SFSPs, and whether these associations were moderated by adolescents’ level of school connectedness.Aims and MethodsSurvey data were collected in 2016/2017 on 10,653 adolescents aged 14–16 years old and 315 staff members in 55 schools from seven European cities. Associations of adolescent-perceived SFSPs and staff-reported SFSPs with best friend, teacher, and societal antismoking norms were estimated in multilevel logistic regression models, adjusted for demographics and school-level smoking prevalence. We tested for interaction between school connectedness and SFSPs.ResultsAdolescent-perceived SFSPs were positively associated with antismoking norms by teachers (odds ratio [OR]: 1.46, 95% confidence interval [CI]: 1.15–1.85), were negatively associated with antismoking norms by best friends (OR: 0.81, 95% CI: 0.67–0.99), but were not significantly associated with antismoking norms by society at large (OR: 0.87, 95% CI: 0.74–1.02). All interaction tests between adolescent-perceived SFSPs and school connectedness were nonsignificant. Staff-reported SFSPs were not associated with any norm and showed no significant interaction with school connectedness.ConclusionsWe found that SFSPs are associated with adolescents’ perception of more antismoking norms by teachers, but less antismoking norms by best friends, irrespective of adolescents’ level of school connectedness.ImplicationsSmoke-free school policies, just as many other tobacco control policies, are assumed to foster adolescents’ perception of antismoking norms. Still, current evidence does not demonstrate which antismoking norms may be influenced by SFSPs and whether this influence is equal for adolescents with different levels of school connectedness. This study suggests that SFSPs foster adolescents’ perception of antismoking norms by teachers, but may concurrently lead to the perception of less antismoking norms by best friends, irrespective of adolescents’ school connectedness. SFSPs may therefore need to be complemented with interventions that target antismoking norms in adolescent peer groups.

Bullying Victimization, School Environment, and Suicide Ideation and Plan: Focusing on Youth in Low- and Middle-Income Countries

PurposeThis study examines the relationship between bullying victimization, measured at individual and school levels, and suicide intent and plan among youth living in less developed parts of the world. MethodsMultilevel modeling is used to estimate the degree to which school-level bullying has an independent effect on the two suicide measures and how it moderates the impact of individual-level victimization on contemplating and planning suicide. Data are drawn from the Global School-Based Student Health (2000–2012) survey that consists of probability samples of adolescents in low- and middle-income countries. ResultsBy fitting three-level mixed effects models, we find that adjusting for personal experience of victimization, greater school-level prevalence of bullying has a positive independent relationship with suicide plan, but not ideation. Significant cross-level interaction effects are shown, that is, the bullying–suicide linkage at the individual level is moderated by the school environment. For suicide ideation only, it is weaker in schools where more students are bullied. The association is also less pronounced in the context characterized by higher proportion of physical violence among students and peer hostility on campus. ConclusionsThe bulk of prior research narrowly defines the relationship between bullying and suicide at the individual (e.g., student) level. This study shows that school context (e.g., proportion of bullied peers) must be incorporated into the analysis in better understanding the conditions under which youth think about and/or plan on inflicting lethal self-harm.

The association between smoke-free school policies and adolescents’ anti-smoking beliefs: Moderation by family smoking norms

BackgroundSmoke-free school policies (SFSPs) may influence adolescents’ smoking through the development of anti-smoking beliefs. We assessed which types of anti-smoking beliefs (health, social and societal) are associated with SFSPs and whether these associations were different for adolescents in smoking permissive versus prohibitive families. MethodsSurvey data was collected in 2016–2017 from 10,980 adolescents between 14–16 years old and 315 staff in 55 schools from seven European cities. We separately measured adolescent-perceived SFSP and staff-reported SFSP at the school-level. Associations between SFSP and anti-smoking health, social and societal beliefs were studied using multi-level logistic regression, adjusting for demographics and school-level smoking prevalence. We tested for interactions between family norms and SFSP, and estimated associations for adolescents in permissive and prohibitive families, respectively. ResultsAdolescent-perceived SFSP was not significantly associated with anti-smoking health (OR:1.08, 95%CI:0.94–1.25), social (OR:0.89, 95%CI:0.75–1.04) and societal beliefs (OR:1.15, 95%CI:0.99–1.33). Staff-reported SFSP were associated with anti-smoking health beliefs (OR:1.12, 95%CI:1.01–1.24), but not with social (OR:0.94, 95%CI:0.83–1.07) or societal beliefs (OR:1.02, 95%CI:0.90–1.14). Most results were comparable between adolescents in smoking prohibitive and permissive families. However, in smoking prohibitive families, adolescent-perceived SFSP were associated with societal beliefs (OR:1.24, 95%CI:1.06–1.46), but not in permissive families (OR:1.06, 95%CI:0.90–1.25). Also, in smoking permissive families, staff-reported SFSP were associated with more pro-smoking social beliefs (OR:0.83, 95%CI:0.72-0.96), but not in prohibitive families (OR:1.05, 95%CI:0.92-1.16). ConclusionsWe found evidence that SFSP are associated with some anti-smoking beliefs, but more so among adolescents from smoking prohibitive families than from permissive families.

Are Environmental Factors for Atopic Eczema in ISAAC Phase Three due to Reverse Causation?

Some previously described environmental associations for atopic eczema may be due to reverse causation. We explored the role of reverse causation by comparing individual- and school-level results for multiple atopic eczema risk factors. The International Study of Asthma and Allergies in Childhood (i.e, ISAAC) Phase Three surveyed children in schools (the sampling unit) regarding atopic eczema symptoms and potential risk factors. We assessed the effect of these risk factors on atopic eczema symptoms using mixed-effect logistic regression models, first with individual-level exposure data and second with school-level exposure prevalence. Overall, 546,348 children from 53 countries were included. At ages 6–7 years, the strongest individual-level associations were with current paracetamol use (odds ratio [OR] = 1.45, 95% confidence interval [CI] = 1.37–1.54), which persisted at school-level (OR = 1.55, 95% CI = 1.10–2.21), early-life antibiotics (OR = 1.41, 95% CI = 1.34–1.48), and early-life paracetamol use (OR = 1.28, 95% CI = 1.21–1.36), with the former persisting at the school level, whereas the latter was no longer observed (OR = 1.35, 95% CI = 1.00–1.82 and OR = 0.94, 95% CI = 0.69–1.28, respectively). At ages 13–14 years, the strongest associations at the individual level were with current paracetamol use (OR = 1.57, 95% CI = 1.51–1.63) and open-fire cooking (OR = 1.46, 95% CI = 1.33–1.62); both were stronger at the school level (OR = 2.57, 95% CI = 1.84–3.59 and OR = 2.38, 95% CI = 1.52–3.73, respectively). Association with exposure to heavy traffic (OR = 1.31, 95% CI = 1.27–1.36) also persisted at the school level (OR = 1.40, 95% CI = 1.07–1.82). Most individual- and school-level effects were consistent, tending to exclude reverse causation.

Starting the Conversation: Are Campus Sexual Assault Policies Related to the Prevalence of Campus Sexual Assault?

One goal of university campus sexual assault (CSA) policies is to help prevent CSA. Federal guidance in the 2014 White House Task Force to Protect Students From Sexual Assault Checklist for Campus Sexual Misconduct Policies suggests 10 elements for inclusion in CSA policies (e.g., Policy Introduction, Grievance/Adjudication), and outlines policy topics to be included within each element (Policy Introduction includes two topics: statement of prohibition against sex discrimination including sexual misconduct and statement of commitment to address sexual misconduct). However, no research has examined whether CSA policies impact CSA prevalence. To begin addressing this gap, we studied 24 universities participating in the 2015 Association of American Universities Campus Climate Survey on Sexual Assault and Sexual Misconduct. We linked 2014-2015 data from these universities' CSA policies and their CSA prevalence findings from the 2015 Association of American Universities (AAU) survey. To test whether the comprehensiveness of schools' CSA policies was related to schools' CSA prevalence, we examined the degree to which the CSA policies included recommended policy content from the aforementioned Checklist. Policies were characterized as more comprehensive if they included greater numbers of Checklist topics. We then correlated the number of topics within the policies with school-level CSA prevalence. We also explored whether there was lower CSA prevalence among schools with policies containing particular topics. Results suggested that greater comprehensiveness of schools' entire CSA policies was negatively correlated with CSA prevalence; however, these findings did not approach statistical significance. The number of negative correlations observed between schools' CSA policy elements and CSA prevalence among undergraduate women was greater than expected by chance alone, suggesting a possible connection between comprehensive CSA policies and CSA prevalence. Schools with policies that included a topic on their sexual assault response team had the lowest CSA prevalence for both women and men, and schools that included topics describing grievance/adjudication procedures had lower CSA prevalence. This study provides a novel examination of CSA and could inform needed research related to the impact of CSA policies on CSA.

Neighborhood political composition and personal belief exemptions from immunization requirements in California Kindergartens, 2000–2015

IntroductionThe growing proportion of parents filing personal belief exemptions (PBEs) from school-based vaccine requirements, and the clustering of PBEs in particular schools and communities, could weaken herd immunity and increase vaccine-preventable disease. Alignment of vaccine opposition with a particular political party or ideology could substantially increase PBEs. This study extends our understanding of the link between vaccine refusal and politics by identifying longitudinal associations between neighborhood political composition and school-level prevalence of PBEs between 2000 and 2015 in California. MethodsCalifornia Department of Public Health data on PBEs in kindergartens were matched with political party registration and voting data from the California Statewide Database. Variables for partisan composition and for conservative political ideology, as well as school and neighborhood controls, were used to estimate both mixed-effects and fixed-effects regression models. ResultsPBE rates increased more rapidly in schools located in highly Republican neighborhoods, and were three times higher than PBE rates in highly Democratic neighborhoods in 2013 (6.6% compared to 2.2%). Mixed-effects models predict a 2.3 percentage-point increase in PBEs between 2007 and 2013 for schools in neighborhoods one standard deviation above the mean for % Republican (59%), compared to a 0.8-point increase for schools in neighborhoods one standard deviation below the mean (24% Republican). Similar results were obtained when using a measure of neighborhood conservatism and when models were estimated using fixed effects. ConclusionsResults indicate growing opposition to mandatory vaccinations in Republican/conservative neighborhoods, which could increase PBE clustering and increase the likelihood for outbreaks of disease in areas where conservative values are widely shared.