Neighborhood Violence Research Articles

Neighborhood characteristics and violence behind closed doors: The spatial overlap of child maltreatment and intimate partner violence.

In this study, we analyze first whether there is a common spatial distribution of child maltreatment (CM) and intimate partner violence (IPV), and second, whether the risks of CM and IPV are influenced by the same neighborhood characteristics, and if these risks spatially overlap. To this end we used geocoded data of CM referrals (N = 588) and IPV incidents (N = 1450) in the city of Valencia (Spain). As neighborhood proxies, we used 552 census block groups. Neighborhood characteristics analyzed at the aggregated level (census block groups) were: Neighborhood concentrated disadvantage (neighborhood economic status, neighborhood education level, and policing activity), immigrant concentration, and residential instability. A Bayesian joint modeling approach was used to examine the spatial distribution of CM and IPV, and a Bayesian random-effects modeling approach was used to analyze the influence of neighborhood-level characteristics on small-area variations of CM and IPV risks. For CM, 98% of the total between-area variation in risk was captured by a shared spatial component, while for IPV the shared component was 77%. The risks of CM and IPV were higher in neighborhoods characterized by lower levels of economic status and education, and higher levels of policing activity, immigrant concentration, and residential instability. The correlation between the log relative risk of CM and IPV was .85. Most census block groups had either low or high risks in both outcomes (with only 10.5% of the areas with mismatched risks). These results show that certain neighborhood characteristics are associated with an increase in the risk of family violence, regardless of whether this violence is against children or against intimate partners. Identifying these high-risk areas can inform a more integrated community-level response to both types of family violence. Future research should consider a community-level approach to address both types of family violence, as opposed to individual-level intervention addressing each type of violence separately.

Exploring the relationship between adverse childhood experiences and oral health-related quality of life.

Evidence indicates that adverse childhood experiences (ACEs) have destructive impacts on quality of life, health outcomes, and health-care expenditures. Studies further demonstrate a dose-response relationship between the number of ACEs and risk for experiencing chronic illness, such as oral diseases later in life. Research is scarce on the prioritization of contextualized public health interventions addressing this important threat. Cross-sectional data from 2011 to 2012 National Survey of Children's Health (NSCH) provided a nationally representative sample of children in the United States, ages 1-17 for dentate status (n = 61,530). The dependent variables identified untreated oral health-care needs and preventive dental utilization. The key independent variables included exposure to parental death, parental divorce, parental incarceration, mental health illnesses, domestic violence, neighborhood violence, and racial discrimination. Exogenous variables included age, sex, race/ethnicity, number of children in household, socioeconomic status proxies, health insurance status, and special health needs. The data, when adjusted for complex survey design, proportionately represent children in the United States. Unadjusted and adjusted logistic regressions revealed varying magnitudes of significance across diverse racial and ethnic profiles. Exposures to parental divorce and parental death particularly exhibited critical magnitudes of influence, compared to all other ACEs. In keeping with the Pareto Principle, exposure to certain ACEs, namely parental divorce and parental death, potentially introduces more profound social and health-related consequences later in life. Therefore, contextualized interventions should prioritize public health efforts to address households burdened with exposure to parental divorce and/or parental death.

Creating reasons to stay? Unaccompanied youth migration, community-based programs, and the power of “push” factors in El Salvador

An emerging literature explores the experiences of Central American unaccompanied youth en route to the US border and a growing number of studies examine what happens once they arrive. However, we know less about their pre-migration context or the effectiveness of in-country youth development programs thought to deter them from migrating. We address this gap by drawing on survey data gathered from young people in El Salvador who participate in Youth Outreach Centers (n = 445). These Centers are local community-based entities that provide youth services in precarious neighborhoods across El Salvador. The majority of respondents reported feeling unsafe where they live, and 61% reported that at least one murder occurred in their neighborhood in the previous year. Amidst these neighborhood conditions, many respondents report that participating in the Centers had a positive impact on key developmental outcomes, academic performance, and employment. However, 42% reported that they still intend to migrate within the next three years, and younger respondents are significantly more likely to have these intentions. Their intentions to migrate are positively associated with risky behavior, and are unaffected by the quality of their experience in the Centers. These findings confirm the importance of investing in youth development programs in Central America, but they also attest to the potency of ‘push’ factors prompting youth migration, particularly from violent neighborhoods.

Collective Efficacy and Violence in Chicago Neighborhoods: A Reproduction

This research tests the reproducibility of the neighborhood-level effects of social composition and collective efficacy on community violence that Sampson, Raudenbush, and Earls reported in a Science article entitled “Neighborhood and Violent Crime: A Multilevel Study of Collective Efficacy.” Based upon data from a resident survey, the U.S. Census, and official homicide reports from Chicago, Sampson et al. found that neighborhood collective efficacy directly affects perceived neighborhood violence, household victimization, and homicide rates. In addition, they reported that the relationship between residential stability and concentrated disadvantage with each measure of violence is mediated after adding their collective efficacy measure to the regression models. This article uses Earls, Brooks-Gunn, Raudenbush, and Sampson’s archived data collection and other archived data collections to assess the extent to which Sampson et al.’s core substantive findings are independently reproducible. While the reanalysis identified some differences between the archived data and the information provided in Sampson et al., the reanalysis produced findings in the same reported direction and statistical significance for virtually all of Sampson et al.’s core substantive outcomes. This confirmation of their key conclusions provides added confidence in their collective efficacy thesis and enhances the prospects for extending it by assessing the degree to which it also affects other crime types and whether these effects persist over time.

A Secondary Spatial Analysis of Gun Violence near Boston Schools: a Public Health Approach.

School neighborhood violence continues to be a major public health problem among urban students. A large body of research addresses violence at school; however, fewer studies have explored concentrations of violence in areas proximal to schools. This study aimed to quantify the concentration of shootings near schools to elucidate the place-based dynamics that may be focal points for violence prevention. Geocoded databases of shooting and school locations were used to examine locational patterns of firearm shootings and elementary, middle, and high schools in Boston, Massachusetts. Analyses utilized spatial statistics for point pattern data including distance matrix and K function methodology to quantify the degree of spatial dependence of shootings around schools. Results suggested that between 2012 and 2015, there were 678 shooting incidents in Boston; the average density was 5.1 per square kilometer. The nearest neighbor index (NNI = 0.335km, p < .001, O = 0.95km, E = 0.28km) and G function analysis revealed a clustered pattern of gun shooting incidents indicative of a spatially non-random process. The mean and median distance from any school to the nearest shooting location was 0.35 and 0.33km, respectively. A majority (56%, 74/133) of schools in Boston had at least one shooting incident within 400m, a distance that would take about 5min to walk if traveling by foot. The bivariate K function indicated that a significantly greater number of shootings were clustered within short distances from schools than would be expected under a null hypothesis of no spatial dependence. Implications for students attending schools in racially homogenous neighborhoods across all income levels are discussed.

Time for a Change

ABSTRACTPolitical scientists should put aside questions about whether voters are rational or irrational, informed or uninformed, and questions about how flawed democracy is. Although they are interesting, these questions are secondary. Answering them in no way helps people—it does not help them with their violent neighborhoods, their declining incomes, their flooded homes, or their dying crops. Instead, researchers should focus on the first-order question of how to improve democratic accountability.

Abstract P289: Social Determinants of Long Term Maintenance of Physical Activity: The Jackson Heart Study

Background: Data showing long term efficacy and sustained active lifestyle change are scant. Identifying social determinants for maintaining an active lifestyle overtime may help pinpoint barriers/facilitators for sustaining an active lifestyle change. Methods: We evaluated the associations between social determinants of health (SDH) and changes in physical activity (PA). The analysis dataset included 3,741 participants in the Jackson Heart Study (JHS) who completed the PA questionnaire at exams 1 and 3, approximately 8 years apart. Participants were classified into 3 PA groups-poor (0 minutes/week moderate/vigorous activity), intermediate (some moderate/vigorous activity), or ideal (≥75 minutes/week vigorous or ≥150 minutes/week moderate or ≥150 minutes/week combined moderate/vigorous activity). SDH evaluated were individual level socioeconomic status (SES), social support, perceived stress and neighborhood characteristics. Other covariates included age, sex and body mass index (BMI). Unadjusted analyses followed by multivariable logistic regression analyses with backward selection were performed to explore the most significant SDH associated with changes in PA. Results: Twenty-eight percent (28%) participants had poor PA at both exams; 35.5% had at least intermediate PA at both exams; 19.2% changed from poor to intermediate/ideal PA and 17.8% changed from intermediate/ideal to poor PA overtime. In unadjusted analyses, among participants with intermediate/ideal PA at exam 1, younger age, higher levels of SES and greater social support; as well as higher neighborhood SES, greater social cohesion, fewer neighborhood problems and violence were positively associated with maintaining intermediate/ideal PA at exam 3. Among those with poor PA at exam 1, the same factors other than social cohesion were associated with improved PA to moderate/ideal level at exam 3. Sex, perceived stress, number of PA facilities in the neighborhood or being overweight/obese at either exam was not associated with changes in physical activity levels. Exploratory multivariable logistic regression with backward selection suggested that all three individual SES indicators were important factors for maintaining moderate/ideal PA levels at exam 3; and younger age, higher education, and higher neighborhood SES were important factors for improving PA levels from poor to intermediate/ideal. Conclusions: Individual SES indicators were significantly associated with maintaining an intermediate/ideal PA overtime; whereas younger age, higher educational attainment and higher neighborhood SES were significantly associated with changes in PA from poor to intermediate/ideal. Targeting individual education and environmental factors (e.g., neighborhood problems, violence) associated with neighborhood SES may provide most benefit both in initiating and maintaining an active lifestyle.

Abstract MP57: Unfavorable Perceived Neighborhood Environment Associates With Lower Levels of Routine Healthcare Utilization: Data From the Dallas Heart Study, 2007-2009

Background: It is well documented that perceived neighborhood environment is associated with cardiovascular (CV) health factors but little is known about how neighborhood environment perception (NEP) relates to routine healthcare utilization, a likely determinant of CV health outcomes. Methods: Using cross-sectional Dallas Heart Study data, we examined the relationship between NEP and routine healthcare utilization. NEP was defined via total score and sub-scores using factor analysis [perceived neighborhood violence, physical environment (i.e. aesthetics), and social cohesion; higher score=more unfavorable perception]. Routine healthcare utilization was based on self-reported time since last visit to a healthcare provider for routine checkup. We used linear regression to determine the relationship between NEP scores and routine healthcare visits, adjusting for age, sex, race/ethnicity, income, education, health insurance status, CV disease burden, and neighborhood deprivation index (NDI). Results: Within the study population (N=1756; 58% black, 27% white and 15% Hispanic), those who reported more recent routine visits were found to be older, more educated and have higher income. When adjusting for confounders (Table), more unfavorable NEP was associated with less frequent routine healthcare visits. Specifically, individuals who perceived a more unfavorable neighborhood physical environment or greater violence level reported greater time since last routine visit. There was no relationship between perceived social cohesion and healthcare usage. Conclusions: Unfavorable NEP was found to significantly relate to decreased routine healthcare utilization even when accounting for health insurance, CV disease and NDI. Furthermore, unfavorable perceived neighborhood violence and physical environment are associated with less routine healthcare utilization. Our findings suggest that NEP may act as a barrier to routine preventive healthcare and ideal CV health outcomes in at-risk communities.

The Effects of Length of Residence and Exposure to Violence on Perceptions of Neighborhood Safety in an Urban Sample.

Perceptions of neighborhood safety shape the well-being of individuals and communities, affecting neighborhood walkability, associated physical activity behaviors, and health conditions. However, less is known about the factors that determine perceptions of safety. One factor that may affect perceptions of neighborhood safety is the length of time someone has lived in their neighborhood. We use a representative, adult sample of urban low-income residents from the 2015 New Haven Health Survey (n = 1189) to investigate the associations between length of residence (new residents of <1year in neighborhood versus longer-term residents of 1 or more years in neighborhood) and perceptions of neighborhood safety (whether feeling unsafe to walk at night). We then examine the potential moderating effect of exposure to neighborhood violence on these associations. We find that the association between length of residence and perceived safety differs by exposure to neighborhood violence. Among those unexposed to neighborhood violence, longer-term neighborhood residents were more likely to feel unsafe compared to new residents (OR = 2.03, 95% CI 1.19, 3.45). Additionally, the effect of exposure to violence on feelings of safety was larger for new residents (OR = 9.10, 95% CI 2.72, 30.44) compared to longer-term residents (OR = 1.88, 95% CI 1.28, 2.77).Our findings suggest that length of residence may have implications for feelings of safety, and that experiences of violence may uniquely contribute to feelings of unsafety among new residents. These findings hold implications for interventions and policy efforts aimed at neighborhood safety improvements through community development, housing, or city urban planning initiatives, particularly for new neighborhood residents or those who experience neighborhood violence.

Early vulnerabilities for psychiatric disorders in elementary schoolchildren from four Brazilian regions

The purpose of the study is to identify early vulnerabilities for psychiatric disorders among Brazilian elementary school children, controlling for familial and community adversities. This is a cross-sectional study examining the association between child psychiatric disorders and potential early vulnerabilities (disability, low intellectual quotient, and negative dimensions of the temperament trait self-directedness (low resourcefulness, low purposefulness, low enlightened second nature), controlling for the potential confounders: familial and community adversities. Four probabilistic samples of second-to-sixth grade students from public schools in four towns from different Brazilian regions (N=1620). The following instruments were applied: the K-SADS-PL (to assess child/adolescent psychiatric disorders); the Ten-Question Screen (to measure child disability); three structured questions used as proxy of self-directedness; and the reduced version of the WISC-III to measure IQ. To evaluate familial/community adversities: Self-Report Questionnaire-SRQ-20 (to assess maternal/primary caretaker anxiety/depression); questions derived from structured questionnaires (to measure child abuse, marital physical violence, neighborhood violence); Brazilian Association of Research Companies questionnaire (to evaluate poverty/socioeconomic status). Trained psychologists interviewed mothers/primary caretakers and evaluated children/adolescents individually. A final logistic regression model showed that children/adolescents with low resourcefulness, low purposefulness, low enlightened second nature, lower IQ and disability were more likely to present any child psychiatric disorders. Early vulnerabilities such as low IQ, presence of disability, and dimensions of temperament were associated with psychiatric disorders among Brazilian elementary school children, after controlling for familial and ecological confounders. These early vulnerabilities should be considered in mental health prevention/intervention programs in low-middle-income countries like Brazil.

Citywide cluster randomized trial to restore blighted vacant land and its effects on violence, crime, and fear

Vacant and blighted urban land is a widespread and potentially risky environmental condition encountered by millions of people on a daily basis. About 15% of the land in US cities is deemed vacant or abandoned, an area roughly the size of Switzerland. In a citywide cluster randomized controlled trial, we investigated the effects of standardized, reproducible interventions that restore vacant land on the commission of violence, crime, and the perceptions of fear and safety. Quantitative and ethnographic analyses were included in a mixed-methods approach to more fully test and explicate our findings. A total of 541 randomly sampled vacant lots were randomly assigned into treatment and control study arms; outcomes from police and 445 randomly sampled participants were analyzed over a 38-month study period. Participants living near treated vacant lots reported significantly reduced perceptions of crime (-36.8%, P < 0.05), vandalism (-39.3%, P < 0.05), and safety concerns when going outside their homes (-57.8%, P < 0.05), as well as significantly increased use of outside spaces for relaxing and socializing (75.7%, P < 0.01). Significant reductions in crime overall (-13.3%, P < 0.01), gun violence (-29.1%, P < 0.001), burglary (-21.9%, P < 0.001), and nuisances (-30.3%, P < 0.05) were also found after the treatment of vacant lots in neighborhoods below the poverty line. Blighted and vacant urban land affects people's perceptions of safety, and their actual, physical safety. Restoration of this land can be an effective and scalable infrastructure intervention for gun violence, crime, and fear in urban neighborhoods.

Organized Activity Involvement among Urban Youth: Understanding Family- and Neighborhood- Level Characteristics as Predictors of Involvement.

Research examining factors that predict youth's involvement in organized activities is very limited, despite associations with positive outcomes. Using data from 1043 youth (49% female; 46.4% Hispanic, 35.4% African American, 14.0% Caucasian, and 4.2% other) from the Project on Human Development in Chicago Neighborhoods, this study examined how characteristics of parents (supervision, warmth) and neighborhoods (perceived neighborhood safety and collective efficacy) predict patterns of adolescents' involvement in organized activities concurrently (i.e., intensity) and longitudinally (i.e., type and breadth). Parental supervision predicted adolescents' participation in organized activities across multiple waves. Neighborhood violence was positively associated with concurrent participation in organized activities after controlling for socioeconomic status (SES), whereas higher neighborhood collective efficacy predicted greater breadth in organized activity participation across time. These findings have important implications regarding how to attract and sustain organized activity participation for low-income, urban youth.

Minority and Immigrant Youth Exposure to Community Violence: The Differential Effects of Family Management and Peers.

Experiences with neighborhood violence can produce negative consequences in youth, including stress, anxiety, and deviant behavior. Studies report that immigrant and minority youth are more likely to be exposed to violence but less likely to perpetrate it. Similarly, research shows parenting practices are differentially adopted by Blacks, Whites, and Hispanics. Although family management strategies can often act as a barrier to the detrimental effects of exposure to community violence (ETV-C), there is a paucity of investigation on how Hispanic subgroups (e.g., Puerto Rican, Mexican) and immigrant families employ such practices in protecting their children against victimization and violence in the community. Applying an ecological framework, we use data from the Project on Human Development in Chicago Neighborhoods to examine the role of parenting and peer relationships on youth ETV-C, across race/ethnicity and immigrant generational status. Our sample is drawn from Cohorts 9, 12, and 15, and is over 40% Hispanic-Latino. We investigate the differences in within and outside the home family management strategies in terms of both race/ethnicity and immigrant generational status. Our work also seeks to determine the effects of race/ethnicity and immigrant status on youth ETV-C, while examining the influence of family management and peer relations. Results indicate that the adoption of family management practices is not homogeneous across Hispanic subgroups or immigrant generational status, and parenting practices seem to mediate the relationship between these characteristics and exposure to violence. Variations in parenting practices underscore the need to disentangle the cultural plurality of racial/ethnic grouping and how immigrant generational status influences parenting choices that protect children from exposure to violence in the community.

The impact of English language learner status on screening for emotional and behavioral disorders: A differential item functioning (DIF) study

AbstractThere have been significant changes in the racial/ethnic and linguistic background of students attending public schools in the United States. The number of public‐school students who are English language learners (ELLs) participating in programs of language assistance has more than doubled over the past two decades. In 1993–1994, 5.1% of public‐school students in the United States were ELLs, or an estimated 2.1 million students. As of 2014–2015, 9.4% of students were ELLs, or an estimated 4.6 million students. It is estimated that by 2030, upward of 40% of school children will speak English as a second language. Meeting the needs of students who are not proficient in English is challenging for school professionals and even more so if they are identified for special services. Researchers have found that ELL students live in situations with numerous high‐risk factors, including poverty, inadequate schools, poor and violent neighborhoods, and limited access to adequate health care, mental health services, and schools. As a group, these students are more likely to underperform academically, have a lower grade point average, and drop out of school compared to non‐ELL Latino students.

Integrative Review of the Intersection of Green Space and Neighborhood Violence.

To systematically analyze evidence about the impact of green space on the perception and actual safety of residents of urban neighborhoods. Systematic review of green space and violence based on Broome review criteria. One landmark study prompted the initial hand search and identification of search terms. Twenty-three quantitative, five qualitative, and two mixed-methods studies were found in the urban planning, public health, medical, and psychological literature that met the following criteria: analyzed green space and violence as factors in the perception of safety as an outcome measure, including action taken by being outside for recreation, exercise, or self-report in the survey. Findings were inconsistent regarding the direct relationship between perception of safety and green space when using recreation and exercise as a proxy for perception of safety. Findings regarding perception of safety in surveys were limited but indicated a positive correlation with green space. There is sufficient evidence to conclude that the perception of safety is supported by quality, accessibility, and aesthetic dimensions of neighborhood green space, and the perception of safety is often unrelated to actual crime rates. The science for understanding mechanisms between green space and violence as part of environmental health has been insufficiently developed and requires further study. Environmental health, including green space, is central to health promotion, and understanding is key to preventing the epidemic of violence. This article provides a summary of research related to green space, violence in communities, perception of safety, and violent crime in those communities. It identifies gaps in our knowledge where future research is needed. Nurses have the opportunity to lead the development, implementation, and evaluation of evidence-based interventions and policies addressing the inequality of quality and quantity of green space in the built and natural environment and related co-benefits.

Association of Adverse Childhood Experiences with Co-occurring Health Conditions in Early Childhood.

To understand how adverse childhood experiences (ACEs) are associated with co-occurring physical, mental and developmental problems during early childhood. A subsample of 19,957 children aged 2-5 years were selected from the 2011-2012 National Survey for Child Health. Outcomes included 18 health conditions organized in singular condition domains (physical, mental, and developmental), and combinations of condition domains (e.g., physical plus mental, mental plus developmental, etc.). Predictors included 8 ACEs (divorce of a parent, death of a parent, exposure to domestic violence, living with someone with a drug or alcohol abuse problem, household member with a mental illness, parent incarceration, neighborhood violence, discrimination). Multivariable logistic regression was performed controlling for demographic characteristics, having a personal doctor, health insurance coverage, and seeing a health care professional in the previous year. Experiencing 3 or more ACEs before the age of 5 years was associated with increased likelihood of nearly every co-occurring condition combination across 3 domains of health. Most notably, experiencing 3 or more ACEs was also associated with a 2-fold increase in likelihood of having ≥1 physical condition and ≥1 developmental condition, a 9-fold increase in likelihood of having ≥1 mental and ≥1 developmental condition, and a 7-fold increase in likelihood of having ≥1 physical, ≥1 mental, and ≥1 developmental condition. This study demonstrates that we can identify the health effects of adversity quite early in development and that management should include communication between both health care and early childhood education providers.

Direct and indirect effects of child abuse and environmental stress: A lifecourse perspective on adversity and depressive symptoms.

There is a great deal of evidence about the mental health implications of physical child abuse and environmental stressors, or hardships that people experience at the household and neighborhood level (e.g., neighborhood violence; economic hardship, substance abuse, or conflict among family members). Yet, studies often focus on either abuse or environmental stress, not both, or examine abuse and environmental stressors as a combined set of experiences. Less is known, therefore, about how child abuse and environmental stress might work as either distinct or interrelated risks to diminish mental health over time. In this longitudinal study, we used path analyses to examine the cumulative effects of physical child abuse and environmental stressors on adult depressive symptoms among a sample of children followed into adulthood (N = 356). The goal was to assess whether chronic physical child abuse remains an independent predictor of adult outcomes once we accounted for the cumulative effects of household and neighborhood stressors across the lifecourse. Cumulative measures of physical child abuse and environmental stress each independently predicted a higher likelihood of adult depressive symptoms (ß = .122, p < .01 and ß = .283, p < .001, respectively). After accounting for adolescent depressive symptoms, only cumulative environmental stressors independently predicted depressive symptoms (ß = .202, p < .001). Tests of the indirect effect of cumulative environmental stress on the relationship between cumulative physical abuse and adult depressive symptoms were marginally statistically significant. Results add to literature that examines child abuse, adversity, and lifecourse perspectives on health. (PsycINFO Database Record

Alcohol use among Arab Muslim adolescents: A mediation-moderation model of family, peer, and community factors.

Alcohol use among Muslims has received scant research attention, and little is known about the factors that underlie Arab Muslim adolescents' use of alcohol. The data used in this study is based on a large and representative sample of 2,948 Arab Muslim students from Israel, aged 11-18. The results showed that almost 10% of the adolescents reported using alcohol. The findings indicated that greater exposure to community violence victimization increases the risk for adolescent affiliation with delinquent peers, which in turn increases the use of alcohol. Furthermore, it was found that positive parent-child communication serves as a protective factor that mitigates the negative impact of association with delinquent peers. Our study indicates that adolescent alcohol use might most effectively be addressed with a holistic approach. The study emphasizes the critical need to reduce violence in Arab neighborhoods and highlights the central role parenting plays in protecting children from involvement in alcohol use. (PsycINFO Database Record

The Co-evolution of Bullying Perpetration, Homophobic Teasing, and a School Friendship Network.

Bullying and homophobic teasing behaviors affect the lives of many school aged children, often co-occur, and tend to peak in middle school. While bullying and homophobic teasing behaviors are known to be peer group phenomena, studies typically examine the associations at the individual or school levels. An examination of these behaviors at the peer group level can aid in our understanding of the formation and maintenance of peer groups that engage in these forms of aggressive behavior (selection), and the extent to which friends and the peer group impact individual rates of these aggressive behaviors (influence). In this longitudinal study, we assess the co-evolution of friendship networks, bullying perpetration, and homophobic teasing among middle school students (n = 190) using a Stochastic Actor-Based Model (SABM) for longitudinal networks. Data were collected from 6-8th-grade students (Baseline age 12-15; 53% Female; 47% Male) across three waves of data. The sample was diverse with 58% African American, 31% White, and 11% Hispanic. Since bullying and homophobic teasing behaviors are related yet distinct forms of peer aggression, to capture the unique and combined effects of these behaviors we ran models separately and then together in a competing model. Results indicated that on average individuals with higher rates of bullying perpetration and homophobic teasing were associated with becoming increasingly popular as a friend. However, the effects were not linear, and individuals with the highest rates of bullying perpetration and homophobic teasing were less likely to receive friendship nominations. There was no evidence that bullying perpetration or homophobic teasing were associated with the number of friendship nominations made. Further, there was a preference for individuals to form or maintain friendships with peers who engaged in similar rates of homophobic name-calling; however, this effect was not found for bullying perpetration. Additionally, changes in individual rates of bullying perpetration were not found to be predicted by the bullying perpetration of their friends; however, changes in adolescent homophobic teasing were predicted by the homophobic teasing behaviors of their friends. In a competing model that combined bullying perpetration and homophobic teasing, we found no evidence that these behaviors were associated with popularity. These findings are likely due to the high association between bullying perpetration and homophobic teasing combined with the small sample size. However, friendship selection was based on homophobic name-calling, such that, there was a preference to befriend individuals with similar rates of homophobic teasing. We also examined several risk factors (dominance, traditional masculinity, impulsivity, femininity, positive attitudes of bullying, and neighborhood violence), although, impulsivity was the only covariate that was associated with higher levels of bullying perpetration and homophobic teasing. More specifically, youth with higher rates of impulsivity engaged in higher rates of bullying perpetration and homophobic teasing over time. The findings suggest bullying perpetration and homophobic teasing have important influences on friendship formation, and close friendships influence youth's engagement in homophobic teasing. Implications for prevention and intervention efforts are discussed in terms of targeting peer groups and popular peers to help reduce rates of these aggressive behaviors.

Examining relationships between perceptions and objective assessments of neighborhood environment and sedentary time: Data from the Washington, D.C. Cardiovascular Health and Needs Assessment.

Sedentary time (ST) and neighborhood environment (NE) are predictors of cardiovascular (CV) health. However, little is known about ST's relationship with NE. We examined associations of perceived and objective NE with ST in the predominantly African American faith-based population of the Washington, D.C. CV Health and Needs Assessment. After using community-based research principles, participants reported NE perceptions, including sidewalks, recreational areas, and crime presence. Factor analysis was conducted to explore pertinent constructs; factor sums were created and combined as Total Perception Score (TPS) (higher score = more favorable perception). Objective NE was assessed using Google Maps and the Active Neighborhood Checklist (ANC). ST was self-reported. Linear regression determined relationships between TPS and ST, and ANC scores and ST, for 1) overall population, 2) lower median-income D.C. areas, and 3) higher median-income DC and Maryland areas. For the sample (N = 98.9% African-American, 78% female), lower median-income areas had significantly lower mean TPS and ANC scores than higher median-income areas (p < 0.001). Three factors (neighborhood violence, physical/social environment, and social cohesion) were associated with overall NE perception. Among those in lower median-income areas, there was a negative association between TPS and ST that remained after covariate adjustment; this was not observed in higher median-income areas. There was no association between ANC scores and ST. Poorer NE perception is associated with greater ST for those in lower income areas, while objective environment is not related to ST. Multi-level interventions are needed to improve NE perceptions in lower-median income areas, reduce ST, and improve CV health.