Early life lead exposure from private well water increases juvenile delinquency risk among US teens.

Early life exposure to environmental lead (Pb) has been linked to decreased IQ, behavior problems, lower lifetime earnings, and increased criminal activity. Beginning in the 1970s, limits on Pb in paint, gasoline, food cans, and regulated water utilities sharply curtailed US environmental Pb exposure. Nonetheless, hundreds of thousands of US children remain at risk. This study reports on how unregulated private well water is an underrecognized Pb exposure source that is associated with an increased risk of teenage juvenile delinquency. We build a longitudinal dataset linking blood Pb measurements for 13,580 children under age 6 to their drinking water source, individual- and neighborhood-level demographics, and reported juvenile delinquency records. We estimate how early life Pb exposure from private well water influences reported delinquency. On average, children in homes with unregulated private wells had 11% higher blood Pb than those with community water service. This higher blood Pb was significantly associated with reported delinquency. Compared to children with community water service, those relying on private wells had a 21% (95% CI: 5 to 40%) higher risk of being reported for any delinquency and a 38% (95% CI: 10 to 73%) increased risk of being reported for serious delinquency after age 14. These results suggest that there could be substantial but as-yet-unrecognized social benefits from intervention programs to prevent children's exposure to Pb from private wells, on which 13% of the US population relies.

Adolescent delinquency following co-occurring childhood head injuries and conduct problem symptoms: findings from a UK longitudinal birth cohort.

Childhood conduct problems and head injuries share a bidirectional association, but how this affects the risk of adolescent delinquency is unknown. Due to their similar underlying mechanisms (i.e. increased impulsivity), this study aims to identify whether their co-occurrence increases the risk of adolescent delinquency. Data was obtained from 11,272 children at age 14 and 10,244 at age 17 years enrolled in the UK Millennium Cohort Study. Conduct problem symptoms (via the Strengths and Difficulties Questionnaire) and head injuries were parent reported from ages 3 to 14 years. Delinquency was self-reported at ages 14 and 17 including substance use, criminality, and antisocial behaviour. Incident rate ratios (IRR) were estimated for delinquency at ages 14 and 17 by childhood conduct problem and head injury status. Co-occurring head injuries and high conduct problem symptoms presented the greatest risk for overall delinquency and substance use at age 14 compared to those with the presence of one or neither (IRRs from 1.20 to 1.60). At age 17, conduct problems (with or without co-occurring head injuries) presented the greatest risk for overall delinquency, substance use, and antisocial behaviour. There was no evidence for an increased risk of delinquency at ages 14 or 17 following a head injury only. Whilst these findings suggest childhood head injuries alone do not increase the risk of adolescent delinquency, when co-occurring alongside high conduct problem symptoms there is a heightened earlier risk. These results provide further insight into adolescent delinquency and the outcomes of co-occurring childhood head injury and conduct problem symptoms.

Trajectories of offending over 9 years after youths' first arrest: What predicts who desists and who continues to offend?

Antisocial and illegal behavior generally declines as youth approach adulthood, but there is significant individual variation in the timing of the peak and decline of offending from adolescence to young adulthood. There are two primary research questions in the present study. First, are there subgroups of youth who follow similar patterns of offending over the nine years after their first arrest? Second, what baseline factors predict which youth will follow each pattern of offending? Data were drawn from the Crossroads study, which includes a sample of racially and ethnically diverse boys who were interviewed regularly for 9 years following their first arrest. Boys were between 13 and 17 years old at the start of the study and were approximately 24-25 years old at the final interview. Trajectories were measured with youths' self-reported offending using latent class growth analysis (LCGA). Results indicated that there were four subgroups of youth: a stable low group (55%), an escalating group (23%), a short-term recidivist group (15%), and a persistently high group (7%). Several baseline factors distinguished the groups. In particular, the results indicated that youth who were informally processed after their first arrest were more likely to be in the low offending group than any of the other LCGA groups. Age at first arrest, peer delinquency, exposure to violence, substance use, callous-unemotional traits, physical aggression, and perceptions of police legitimacy were also significantly related to group membership. Results suggest that certain risk factors identified after youths' first arrest may predict which youth continue to offend and which desist.

Short-term mindsets show co-development with adolescent delinquency, but not with adolescent cannabis use.

Guided by General Theory of Crime and Psychosocial Maturity Hypothesis, we investigated co-development between short-term mindsets (impulsivity and future orientation) and risk behaviors (cannabis use and delinquency). Parallel process latent growth modeling on three-wave data from ethnically diverse Swiss adolescents (N = 1365; Mage 13.67 years, 48.6% female), showed baseline-level associations between short-term mindsets and risk behaviors, and between the two risk behaviors. Additionally, correlated change (co-development) existed between short-term mindsets-particularly impulsivity-and delinquency, but not between short-term mindsets and cannabis use. These results support the above-mentioned theories and emphasize the importance of investigating the correlates of change in delinquency and cannabis use separately, as divergent findings might emerge. These divergent findings could partially stem from Switzerland's liberal views on cannabis use.

Understanding the role of parental warmth and its association with developmental trajectories of delinquency across cultures.

INTRODUCTION: Despite previous research delving into the trajectories of delinquency during adolescence and their links to parental warmth, there remains a notable gap in understanding cultural differences in these trajectories and associated factors. This study sought to address this gap by examining and comparing the levels and trajectories of delinquency, along with their association with parental warmth, between the United States and South Korea. METHOD: The study included American adolescents (N = 5,665) from the National Longitudinal Study of Adolescent to Adult Health (Add Health) at Wave I (1995), II (1996), and III (2001) and Korean adolescents (N = 3,449) selected from the Korean Youth Panel Survey at Wave I (2003), II (2004), and VI (2008). The participants, including both adolescent boys and girls at the age of 14/15 at Wave I, completed surveys at each wave. RESULTS: Results from latent growth curves showed that delinquency levels peaked in middle adolescence and declined thereafter in both countries. The initial level of delinquency was higher for American adolescents than for Korean adolescents, however, the slope of delinquency declined faster for American adolescents than for Korean adolescents. Further, the protective effect of parental warmth on delinquency was stronger for Korean adolescents than for American adolescents. CONCLUSION: The cultural differences in the levels and trajectories of delinquency, along with the different strengths of the protective effect of parental warmth, highlight the importance of considering cultural contexts in understanding delinquency trajectories and the protective role of parental warmth against delinquency.

Identity status and narrative identity processes in female adolescents' stories about committing crimes and being convicted.

INTRODUCTION: Adolescent delinquency has been suggested to evolve from a normative motivation to establish independence and identity. However, few studies have examined this in detail, especially in young women. The aim was, therefore, to investigate identity formation in adolescent females with limited delinquency by focusing on identity status and identity processes in narratives about committing crimes and being convicted. METHODS: Interviews with 10 females, 15-18 years old, sentenced to youth service in three Swedish cities were conducted on Zoom. RESULTS: The results showed an equal distribution of all identity statuses within the group. Thematic analysis of their stories about crime and conviction showed that delinquency was described in terms of exploration and commitment, although commitment appeared more clearly. Social relations, in particular peers, played an important role in both committing as well as desisting from delinquency. In terms of narrative processes, the stories contained elements of agency, although diminishing of one's own capability and/or responsibility was common, and meaning making, mostly lesson learning, usually pertained to behaviors, interactional rules, or norms. CONCLUSION: These findings point to the importance of viewing delinquency among young women in a social and developmental context, where delinquency may be a part of the process of identity formation. Interventions focusing on expressing needs of belonging as well as finding oneself in more adaptive ways are warranted, where supporting pro-social relations and contexts is a suggested focus.

In search of the origins of crime continuity: Aggressive versus nonaggressive delinquency as a key factor in the psychological inertia process.

The purpose of this study was to test whether the psychological inertia process believed to give rise to crime continuity is limited to aggressive delinquency or evolves from both aggressive and nonaggressive delinquency. Self-report data provided by 845 early adolescent youth (406 boys, 439 girls) were analyzed in an effort to test the hypothesis that aggressive rather than nonaggressive delinquency precipitates a rise in delinquency through the intervening influence of cognitive impulsivity but not moral neutralization. The hypothesis stated that of the four models evaluated in this study (aggressive delinquency → moral neutralization → offense variety; aggressive delinquency → cognitive impulsivity → offense variety; nonaggressive delinquency → moral neutralization → offense variety; nonaggressive delinquency → cognitive impulsivity → offense variety), only the aggressive delinquency → cognitive impulsivity → offense variety model would achieve significance. Consistent with this hypothesis, only the aggressive delinquency → cognitive impulsivity → offense variety pathway was, in fact, significant. The current findings suggest that the psychological inertia process may be driven by a pattern of aggressive delinquency followed by cognitive impulsivity and that neither nonaggressive delinquency nor moral neutralization contribute to the process. Theoretical and practical implications of these results are discussed.

Cooperative coparenting and the associations with adolescent behavioral problems and delinquency in unmarried families.

INTRODUCTION: Coparenting in unmarried families is a protective factor for positive adolescent adjustment. Although the relations between coparenting and adolescent outcomes have been investigated, it remains unclear whether the specific patterns of maternal and paternal coparenting are associated with adolescent behavioral outcomes. METHODS: The present study includs a longitudinal cohort of 1143 triads of unmarried parents and their adolescents to examine the associations between different patterns of coparenting and adolescent behavioral problems and delinquency. The data were drawn from the Future of Families and Child Wellbeing Study in the United States. Our study used six waves of publicly available data at children's birth, ages 1, 3, 5, 9, and 15. RESULTS: The latent profile analyses identified four coparenting profiles of maternal and paternal coparenting perceived by the other unmarried parent. Comparing average levels of coparenting between mothers and fathers, the profiles were entitled Low Mom-Low Dad, High Mom-Medium Dad, Low Mom-Medium Dad, and High Mom-High Dad. Parents characteristics, such as cohabitation and marital status, predicted the likelihood of being in cooperative coparenting profiles. Furthermore, all the identified coparenting profiles predicted adolescent externalizing behavioral problems; only the high mom cooperative coparenting profiles predicted adolescent internalizing behavioral problems; none of the coparenting profiles predicted adolescent delinquency. CONCLUSIONS: Our study adds empirical evidence for coparenting research by revealing that coparenting patterns vary in unmarried families and that cooperative coparenting benefits child behavioral outcomes. The findings encourage introducing different coparenting training programs targeting unmarried parents' diverse needs, thus promoting positive adolescent adjustment.

Investigating Trauma Symptomology as a Mediator of the Relationships Between Childhood Maltreatment and Sexual and Non-Sexual Delinquency.

Maltreatment is a risk factor for both sexual and non-sexual delinquency. Little is known about how specific forms of maltreatment relate to the distinct offending outcomes. Though trauma symptoms have been associated with maltreatment and delinquency, the intervening role of trauma symptoms in pathways from maltreatment to offending is not well understood. The goal of the current study was to test social learning and general strain theory explanations for sexual and non-sexual delinquency in adolescence, exploring trauma symptoms as a mediator between the four major types of maltreatment and offending outcomes. Data were collected via surveys of 136 incarcerated youth at seven residential treatment and community corrections facilities in a Midwestern state. Confirmatory factor analysis (CFA) was used to establish a measurement model, and structural equation modeling was employed to test direct and indirect pathways from maltreatment to offending. Individual forms of maltreatment had differential relationships with offending outcomes, with neglect having a significant association with non-sexual delinquency, and sexual abuse having a significant direct relationship with sexual delinquency. Trauma symptomology did not mediate these relationships. Future research should explore developmentally appropriate proxies for measuring childhood trauma. Practice and policy should consider the role of maltreatment victimization history in the inception of delinquency behaviors, prioritizing therapeutic alternatives to detention and incarceration.

COVID-19 Pandemic-Related Financial Hardships and Adolescents' Adjustment: A Longitudinal Family Stress Approach.

Restrictions associated with the onset of the COVID-19 pandemic created a host of short- and long-term economic challenges for families. Despite their ubiquity during the early pandemic, knowledge on the developmental impacts of pandemic-related financial hardships on adolescents' adjustment is lacking. Guided by family stress and life course perspectives, this study investigated direct and indirect relations between pandemic-related financial hardships and adolescents' later depressive symptoms, delinquency, and academic performance via parents' depressive symptoms and acceptance. Data were drawn from three waves of a longitudinal study; participants completed online surveys at Wave 1, COVID-19 Wave (seven months later) and Wave 2 (five months later). Participants were two adolescent-aged siblings (n = 1364; 50% female; Mage = 14.45, SD = 1.55 years) and one parent (n = 682; 85% female; Mage = 45.15, SD = 5.37 years) from 682 families (N = 2048). Structural equation modeling results indicated that pandemic-related financial hardships were indirectly linked to greater adolescent delinquency and lower academic performance by adversely shaping parents' mental health and parent-adolescent relationship quality. The findings highlight financial hardships as critical family stressors for adolescent adjustment during the COVID-19 pandemic.

Longitudinal Links Between Parental Emotional Distress and Adolescent Delinquency: The Role of Marital Conflict and Parent-Child Conflict.

The mediating processes linking parental emotional distress and changes in adolescent delinquency over time are poorly understood. The current study examined this question using data from 457 adolescents (49.5% female; 89.5% White; assessed at ages 11, 12, and 15) and their parents, part of the national, longitudinal Study of Early Child Care and Youth Development (SECCYD). Maternal depression was only directly associated with changes in adolescent delinquency. Paternal depression was indirectly associated with changes in adolescent delinquency through a partner effect on mother-child conflict. The findings indicate the salience of parental depression and mother-child conflict for increases in adolescent delinquency and highlight the importance of including parental actor and partner effects for a more comprehensive understanding of the tested associations.

Religiosity and Associations with Substance Use and Delinquency Among Urban African American Adolescents.

Adolescent delinquency and substance use are global problems. African American adolescents are especially susceptible to the life-changing consequences of these problem behaviors. Religiosity is a notable protective factor that has been shown to mitigate these behaviors. This study uses a person-centered approach to examine the extent to which religiosity is associated with lower rates of delinquency and substance use among urban African American adolescents in the United States. Latent Class Analysis was used to examine the heterogeneity in five religiosity items among a sample of adolescents ages 13-18. After identifying religiosity classes through a class enumeration process, we examined predictors of the classes using multinomial logistic regression. The classes were then used to predict several substance use and delinquency outcomes. Three religiosity classes were identified; "low religious beliefs and engagement," (15.19%, n = 94), "religious with low active engagement," (56.70%, n = 351), and "religious with high active engagement," (28.11%, n = 174). Protective effects of religiosity on substance use (e.g., alcohol) and delinquency were found (e.g., assault). Implications for research and practice are discussed.

Reciprocal relations between interparental aggression and symptoms of oppositional defiant and conduct disorders: a seven-wave cohort study of within-family effects from preschool to adolescence.

BACKGROUND: Interparental aggression is believed to increase the risk of behavioral disorders in offspring, and offspring behavioral problems may forecast interparental aggression. However, these assumptions have yet to be put to a strong test. This study, therefore, examined whether increased interparental aggression predicted increased symptoms of oppositional defiant disorder (ODD) and conduct disorder (CD) from preschool to adolescence and vice versa. METHODS: A sample (n = 1,077; 49.6% girls) from two birth cohorts of children in Trondheim, Norway, was assessed biennially from age 4 to 16. Children's symptoms of ODD and CD were assessed using semi-structured clinical interviews of parents (from age 4) and children (from age 8). One of the parents reported on their own and their partner's verbal and physical aggression. A random intercept cross-lagged model was estimated to test the within-family relations between interparental aggression, CD, and ODD symptoms. RESULTS: Across development, increased interparental aggression predicted increased CD symptoms 2 years later, whereas an increased number of ODD symptoms forecasted increased interparental aggression. CONCLUSIONS: The argumentative/defiant, aggressive, and vindictive behaviors seen in ODD are often directed toward parents and may take a toll on their relationship and possibly foster interparental aggression, whereas aggression between parents may promote symptoms of CD in their offspring, which commonly extend beyond the home. Incorporating effective and non-aggressive means to solve interparental conflict into parental management programs may reduce the development of symptoms of CDs in children.

Sexual Victimization in Adolescence: Pathways of Risk from Sexual Harassment via Risky Alcohol Use and Delinquency Among U.S. Adolescents.

Sexual harassment is a common, yet understudied form of peer victimization experienced by adolescents during a critical period in the development of sexual identity. Adverse sexual experiences early in life (e.g., child sexual abuse) can increase risk of future sexual assault victimization; however, it is unclear as to whether sexual harassment victimization is also a risk factor for sexual assault. We examined the prospective association between peer sexual harassment and experiencing sexual victimization in the following year among a community sample of 13-15-year-old adolescents (N = 800, 57% female) from the northeastern USA. We also examined whether risky alcohol use and delinquency mediated the association between sexual harassment and sexual assault victimization, as well as whether the paths differed by gender. Results indicated that sexual harassment victimization prospectively predicted later sexual victimization for both girls and boys. Using a parallel mediation path model, we determined that for girls, sexual harassment victimization predicted both risky alcohol use and delinquency, but only risky alcohol use was predictive of sexual victimization. For boys, sexual harassment victimization predicted delinquency but not risky alcohol use. Risky alcohol use was not associated with sexual victimization for boys. Findings indicate that sexual harassment victimization increases risk of later sexual victimization in adolescence, but the pathways differ by gender.

The Role of Mental Health and Delinquent Behaviors in the Cycle of Sexual Violence Among Croatian Adolescents: A Longitudinal Exploration with Replication.

The "cycle of violence" perspective links the experience of being a victim of violence with later aggressive or violent behavior. While the association between victimization and aggression is relatively established, the mechanisms involved in the cycle of violence are less understood. The current study considered the role of mental health and delinquency on the pathway between sexual victimization and sexual aggression in two independent longitudinal samples of Croatian adolescents (Mage at baseline = 16 years). Using data from the first panel (six data waves, 2015-2018; n = 1289), structural equation modeling analysis pointed to a psychosocial mechanism, a combination of symptoms of depression/anxiety and delinquency, that mediated the link between the experience of sexual victimization and self-reported sexual aggression. We also observed a significant role of family environment in this psychosocial mechanism. The pattern of findings was partially replicated in the second panel with five waves of data (2015-2017; n = 750). The study's results can help inform conversations around designing policies to prevent and address peer sexual violence among Croatian adolescents.

Likelihood of identifying autistic traits with the autism spectrum quotient (AQ) in male juveniles with autism spectrum disorder (ASD) and severe behavioral problems (SBPs).

BACKGROUND: When screening for autism spectrum disorders (ASD), the Autism Spectrum Quotient (AQ) is generally considered to be useful. Whether the AQ is also a suitable screener for ASD in juveniles with severe behavioral problems (SBPs) is unknown. Due to the overlap of symptoms between ASD and SBPs, particularly in juveniles low on empathy, the screening capacity of the AQ might be constrained. The aim of the present study was to investigate whether (comorbid) SBPs affect the screening capacity of the AQ. The hypothesis is that male juveniles with SBPs - but without a diagnosis of ASD - will score higher than male juveniles without both SBPs and ASD. METHOD: The AQ was completed by 216 male juveniles aged 15-18 years treated at an outpatient department of child and adolescent psychiatry. The 216 participants were categorized into four groups according to a clinical diagnosis of ASD and SBPs (defined as disruptive behavior disorder and/or delinquent behavior). Using multinomial logistic regression, we investigated whether the four identified groups, based on a diagnosis of ASD and SBPs, scored differently for the total score and subscales of the AQ. RESULTS: Participants in the group with ASD (ASD+) but without SBPs (SBP-) were more likely to report higher levels of autistic traits than the reference group without both ASD and SBPs (ASD-SBP-), except for the subscale on attention to detail (ASD+SBP- OR = 1.04; 95%CI = 0.98-1.11). Participants in the group with both ASD and SBPs were more likely to report higher levels for the total AQ score (ASD+SBP+ OR = 1.03; 95%CI = 1.00-1.05) and the communication subscale of the AQ (ASD+SBP+ OR = 1.18; 95%CI = 1.07-1.31) than the reference group without both ASD and SBPs. CONCLUSION: In outpatient male juveniles, SBPs do not affect the screening capacity of the AQ for autistic traits. In spite of the well-known overlap of symptoms between ASD and SBPs, male juveniles with SBPs but without a diagnosis of ASD do not score higher on the AQ than male juveniles without SBPs and without a diagnosis of ASD.

The effectiveness of blended versus regular Forensic Outpatient Systemic Therapy in the treatment of juvenile antisocial behavior: a study protocol of a randomized controlled trial.

BACKGROUND: Antisocial behavior during adolescence can have long-lasting negative effects and leads to high societal costs. Forensic Outpatient Systemic Therapy (Forensische Ambulante Systeem Therapie; FAST) is a promising treatment for juveniles aged 12-21 showing severe antisocial behavior. The intensity, content and duration of FAST can be adjusted to the needs of the juvenile and their caregiver(s), which is considered crucial for effective treatment. Next to the regular version of FAST (FASTr), a blended version (FASTb) in which face-to-face contacts are replaced by minimally 50% online contacts over the duration of intervention was developed during the Covid-19 pandemic. The current study will investigate whether FASTb is equally effective as FASTr, and through which mechanisms of change, for whom, and under which conditions FASTr and FASTb work. METHODS: A randomized controlled trial (RCT) will be carried out. Participants (N = 200) will be randomly assigned to FASTb (n = 100) or FASTr (n = 100). Data collection will consist of self-report questionnaires and case file analysis, and include a pre-test at the start of the intervention, a post-test immediately after the intervention, and a six month follow-up. Mechanisms of change will be investigated using monthly questionnaires of key variables during treatment. Official recidivism data will be collected at two-year follow-up. DISCUSSION: This study aims to improve the effectiveness and quality of forensic mental health care for juveniles with antisocial behavior by studying the effectiveness of blended care, which has not been studied before in treatment of externalizing behavior. If found to be at least as effective as face-to-face treatment, blended treatment can help meet the urgent need for more flexible and efficient interventions in this field. In addition, the proposed study aims to unravel what works for whom, knowledge urgently needed in mental health care for juveniles with severe antisocial behavior. TRIAL REGISTRATION: This trial was registered at ClinicalTrials.gov on 07/11/2022, registration number NCT05606978.

Adverse childhood experiences, sleep problems, low self-control, and adolescent delinquency: A longitudinal serial mediation analysis.

Several studies link adverse childhood experiences (ACEs) to delinquency. Yet, developmental sequalae accounting for this association remain unclear, with previous research limited by cross-sectional research designs and investigations of singular mediating processes. To redress these shortcomings, this study examines the longitudinal association between ACEs and delinquency as mediated by both sleep problems and low self-control, two factors which past research implicates as potentially important for understanding how ACEs contribute to antisocial behavior. Data collected from 480 adolescents (71.3% boys; 86.3% White) and their parents participating in the Michigan Longitudinal Study was used to conduct a serial mediation analysis. The association between ACEs (prior to age 11) and delinquency in late adolescence was found to operate indirectly via sleep problems in early adolescence and low self-control in middle adolescence. Nonetheless, a direct association between ACEs and later delinquency remained. Pathways through which ACEs contribute to later delinquency are complex and multiply determined. Findings indicate that early behavioral interventions, including improving sleep and self-control, could reduce later delinquency. Still, more research is needed to identify additional avenues through which the ACEs-delinquency association unfolds across development.

Sensation-seeking-related DNA methylation and the development of delinquency: A longitudinal epigenome-wide study.

Heightened sensation-seeking is related to the development of delinquency. Moreover, sensation-seeking, or biological correlates of sensation-seeking, are suggested as factors linking victimization to delinquency. Here, we focused on epigenetic correlates of sensation-seeking. First, we identified DNA methylation (DNAm) patterns related to sensation-seeking. Second, we investigated the association between sensation-seeking related DNAm and the development of delinquency. Third, we examined whether victimization was related to sensation-seeking related DNAm and the development of delinquency. Participants (N = 905; 49% boys) came from the Avon Longitudinal Study of Parents and Children. DNAm was assessed at birth, age 7 and age 15-17. Sensation-seeking (self-reports) was assessed at age 11 and 14. Delinquency (self-reports) was assessed at age 17-19. Sensation-seeking epigenome-wide association study revealed that no probes reached the critical significance level. However, 20 differential methylated probes reached marginal significance. With these 20 suggestive sites, a sensation-seeking cumulative DNAm risk score was created. Results showed that this DNAm risk score at age 15-17 was related to delinquency at age 17-19. Moreover, an indirect effect of victimization to delinquency via DNAm was found. Sensation-seeking related DNAm is a potential biological correlate that can help to understand the development of delinquency, including how victimization might be associated with adolescent delinquency.

Effects of neighborhood disadvantage and peer deviance on adolescent antisocial behavior: Testing potential interactions with age-of-onset.

Research has suggested that childhood-onset conduct problems (CPs) are more strongly related to individual predispositions, whereas adolescent-onset CP is more strongly associated with social factors, such as peer delinquency. Neighborhood disadvantage (ND) increases the risk for associating with deviant peers. Thus, peer delinquency could mediate the relationship between ND and adolescent-onset CP. This mediational hypothesis has not been tested previously. We tested this hypothesis in 1,127 justice-involved adolescent males using self-reported delinquency and official arrest records over 3 years after the youth's first arrest as outcomes. Predictors were self-reported and census-derived indicators of ND and self-reported peer delinquency. Age of onset moderated the associations between self-reported ND and arrests and between self-report of peer delinquency and arrests. In both cases, the association was stronger for those with adolescent-onset CP. Peer delinquency mediated all relationships between ND and CP. Our results also showed some unexpected differences in associations depending on whether self-reported ND or census-derived indicators were used as predictors. Specifically, census-derived ND was negatively related to self-reported offending, which could be due to the use of an arrested sample and the need for youth in more advantaged neighborhoods to show a more severe pattern of antisocial behavior to be arrested.