Data from the Survey of Police-Adolescent Contact Experiences (SPACE) was used for this analysis. SPACE is a recent, cross-sectional, non-probability sample survey of Black youth aged 12-21 in Baltimore City designed to better understand urbans youths’ police exposures and their health impacts. Data collection occurred from August 2022 to July 2023. Community-based recruitment involved collaboration between SPACE investigators at the Johns Hopkins Bloomberg School of Public Health and 12 youth-serving organizations in Baltimore City. These organizations partnered with the research team to share the survey opportunity and assist youth in completing it, both on-site and online. The project was co-developed with the Center for Adolescent Health (CAH) Youth Advisory Board (YAB) to ensure youth co-production of materials and inclusion of diverse youth participants in the survey. Surveys were conducted on Qualtrics, with participants receiving $30. To ensure data quality, attention checks were integrated into the survey and respondents were screened out if data quality was compromised.
To be eligible for participation in the survey, youth were required to 1) reside in Baltimore City, 2) identify as Black or African American (including Black biracial and multiracial), and 3) be 12-21 years old. The final sample size for SPACE is 345 youth. However, for the present study, we restrict the sample to youth who had valid data on the sexual identity question (n = 321; ~40% LGBQ). Ethical approval was obtained from the Johns Hopkins Bloomberg School of Public Health Institutional Review Board (#18323). Written informed consent was obtained from all participants ages 18 and older, whereas written parental permission and written youth assent were obtained from all participants under age 18.
Outcome Variable
Depressive symptoms. Depressive symptomatology was measured using the CES-D-10 (Center for Epidemiologic Studies – Depression, 10 item) scale, a short-form measure of the widely used and validated CES-D scale to assess depressive symptom severity [26,27], including in adolescents [28]. Youth were provided with the following statement: “Below is a list of some of the ways you may have felt or behaved. For each statement, please select how often you have felt this way during the past week.” 1) I was bothered by things that usually don’t bother me, 2) I had trouble keeping my mind on what I was doing, 3) I feel depressed, 4) I felt that everything I did was an effort, 5) I feel hopeful about the future (reverse-coded), 6) I felt fearful, 7) My sleep was restless, 8) I was happy (reverse-coded), 9) I felt lonely, and 10) I could not “get going”. Response options range from 1 (Rarely or none of the time [less than one day]) to 4 (most or all of the time [5-7 days]). For the purposes of this study, items were averaged into a composite index (range = 1-4; alpha = 0.79), with higher scores indicating greater symptomatology.
Independent Variables
Cumulative Police Exposures.During the survey, youth were asked about various ways they may have been exposed to police or police stops, either directly or vicariously. These included the following six binary items capturing different forms of police exposure: 1) Known Persons Stopped by Police, 2) Daily Police Violence News, 3) Watched Fatal Police Violence Videos, 4) In-Person Witnessed Police Stop, 5) In-Person Direct Police Stop, and 6) In-Person Intrusive Police Stop. For more details on the measurement of each item, see the appendix. Similar to literature on cumulative adverse childhood experiences [19], the six items were summed into a count measure of cumulative police exposures ranging from 0-6 (alpha = 0.72).
Police Violence Stress. In a similar fashion to Howard and colleagues [29], we captured young people’s distress about police violence against members of their community by asking participants how 1) concerned, 2) worried, and 3) stressed they were about “police brutality or unfair treatment of members in your community by law enforcement.” Response options to the three items included 0 (Not at all) to 4 (Extremely). Items were summed into an additive index ranging from 0-12 (alpha = 0.86), with higher scores representing greater stress.
Moderating Variable
LGBQ Identity. The focal moderating variable is LGBQ identity. In the demographics section of the survey, youth were asked, “What best describes your sexual orientation?” Based on responses, youth were categorized as heterosexual, lesbian, gay, bisexual, or queer. The latter designation included individuals who explicitly identified as queer and other less frequently endorsed groups reporting other identities that did not fall into the previous categories (e.g., pansexual).
Covariates
The following covariates were included in each of the multivariable models to minimize the likelihood of spurious results: youth age (in years), youth sex (male = 1; female = 0), youth multiracial identity (Black/African American in conjunction with other race/ethnicity = 1), youth delinquency (13-item index adopted from the Future of Families and Child Wellbeing Study (FFCWS) [30]; alpha = 0.95), youth ACEs (11 items), home safety (i.e., how often do you feel safe at home? Never, sometimes, most of the time, always), school safety (i.e., how often do you feel safe at home? Never, sometimes, most of the time, always), neighborhood safety (i.e., how often do you feel safe at home? Never, sometimes, most of the time, always), neighborhood disorder (i.e., trash/litter, graffiti/broken windows, run-down buildings), biological parents married (yes/no), biological parents cohabiting (yes/no), biological parent immigrant (yes/no), maternal education (i.e., from less than high school to completed graduate degree), and household size (i.e., number of people living in current residence).
Statistical Analyses
First, we calculated descriptive statistics among the full sample and LGBQ identity subgroups. Second, we employed multivariable Ordinary Least Squares (OLS) regression to examine associations between cumulative police exposures, police violence stress, and depressive symptoms, including both standardized and unstandardized coefficients. Standardized coefficients were calculated by multiplying the unstandardized coefficients by the ratio of the standard deviations of the independent variable and the dependent variable. Third, we re-ran the OLS regression models stratified by LGBQ identity to test whether LGBQ identity moderated associations between cumulative police exposures, police violence stress, and depressive symptoms. Fourth, we constructed product-terms between cumulative police exposures and each LGBQ identity, as well as police violence stress and each LGBQ identity, to test for interaction effects by specific identities. We then calculated covariate-adjusted predicted depressive symptoms scores by cumulative police exposures and police violence stress across sexual identities. These results were then plotted in illustrative figures to facilitate interpretation of results. Finally, we restricted our last analysis to the subsample of LGBQ youth (n = 130) and tested whether a product-term including cumulative police exposures and police violence stress significantly predicted depressive symptoms. In ancillary analyses, interactions between the key independent variables (i.e., cumulative police exposures and police violence stress), sex (male = 1), and age were also tested as predictors of depressive symptoms in the full sample. Missing data was imputed in STATA 17.1 using mi commands, which offers advantages over listwise deletion (e.g., resolves issues related to wastefulness as well as biased covariances, p-values, and confidence intervals) [31]. In the present study, we employ multiple imputation with chained equations, imputing variables with less than 10% missing data [32], resulting in 20 multiply imputed data sets.