Shared Decision-Making with Latinx Caregivers During Community Implemented Evidence-Based Practices: Determinants and Associations with Alliance.

OBJECTIVE: The current observational study examined shared decision-making (SDM) with caregivers of Latinx youth within the delivery of multiple evidence-based practices (EBPs) in community mental health services. The aims of the study were to (1) Identify therapist and client factors associated with increased SDM within EBP sessions and (2) Examine the association between SDM and therapeutic alliance between community therapists and Latinx caregivers. METHOD: The Observing Patient Involvement in Decision-Making (OPTION) instrument measured SDM in 210 audio-recorded therapy sessions with 62 community therapists (91.94% female; 69.35% Latinx) and 109 Latinx caregivers (91.43% female) of youth who were an average age of 8.26 years (SD = 3.59). We used the Therapy Process Observational Coding System for Child Psychotherapy-Alliance scale to measure the caregiver-therapist alliance observationally. Multilevel linear regressions were conducted to examine research questions. RESULTS: Greater SDM was observed within sessions where therapists targeted conduct problems versus trauma (B = -8.79, 95% CI[-14.09, -3.49], p = .001). There was a trend that SDM was higher in English-language sessions compared to Spanish. We found that the global measurement of SDM (B = .04, 95% CI[.01, .08], p = .03) and the OPTION item Integrate Preferences (B = .69, 95% CI[.07, 1.32], p = .03) were positively associated with alliance. CONCLUSIONS: SDM may help foster Latinx caregiver engagement within EBP delivery. Provider training in SDM may be warranted with consideration of the specific clinical contexts (e.g., by presenting problem) that are appropriate for collaborative treatment planning. More research is needed to further establish the benefits of SDM in youth psychotherapy.

Trajectories of Change in Parent-Child Interaction Therapy Outcomes in Latinx Families: Implications for Cultural Adaptation.

OBJECTIVE: Parent-Child Interaction Therapy (PCIT) is a parenting program in which caregivers must achieve "skill criteria" in using Do Skills and avoiding Don't Skills to complete treatment. Despite PCIT's emphasis on these skills, little is known about how Latinx caregivers acquire these Western-based parenting practices and whether cultural mismatches lead to inequities in outcomes. This study compared the trajectories of change in PCIT skills and treatment outcomes of Latinx and non-Latinx White families. METHOD: We analyzed weekly treatment data from 64 families (20.3% Spanish-speaking Latinx, 51.6% English-speaking Latinx, 28.1% non-Latinx White) served in community clinics. Caregivers were mostly females (95.3%), on average 35.13 years old, and lived in poverty (77.6%). PCIT skills were coded using the Dyadic Parent-Child Interaction Coding System, and child behavior problems were reported using the Eyberg Child Behavior Inventory. RESULTS: Latinx and non-Latinx White caregivers acquired Do Skills similarly during treatment. In contrast, some Latinx caregivers began treatment using significantly more Don't Skills and needed more sessions to achieve some aspects of PCIT skill criteria compared with non-Latinx White caregivers. Latinx families also experienced similar or even more pronounced reductions in child behavior problems than non-Latinx White families. There were no significant differences in the percentage of caregivers who achieved PCIT skill criteria or left treatment prematurely. CONCLUSIONS: This study provides evidence that strictly defined PCIT skill criteria may lead to inequities in treatment length for some Latinx families. Informed by these findings, we propose data-driven adaptations to improve the cultural fit of PCIT for Latinx groups.

Mediators of Ethnic Differences in Dropout Rates From a Randomized Controlled Treatment Trial Among Latinx and Non-Latinx White Primary Care Patients With Anxiety Disorders.

ABSTRACT: Disparities in treatment engagement and adherence based on ethnicity have been widely recognized but are inadequately understood. Few studies have examined treatment dropout among Latinx and non-Latinx White (NLW) individuals. Using Andersen's Behavioral Model of Health Service Use (A behavioral model of families' use of health services. 1968; J Health Soc Behav. 1995; 36:1-10) as a framework, we examine whether pretreatment variables (categorized as predisposing, enabling, and need factors) mediate the relationship between ethnicity and premature dropout in a sample of Latinx and NLW primary care patients with anxiety disorders who participated in a randomized controlled trial (RCT) of cognitive behavioral therapy. Data from a total of 353 primary care patients were examined; 96 Latinx and 257 NLW patients participated. Results indicated that Latinx patients dropped out of treatment more often than NLW patients, resulting in roughly 58% of Latinx patients failing to complete treatment compared with 42% of NLW, and approximately 29% of Latinx patients dropping out before engaging in modules related to cognitive restructuring or exposure, relative to 11% of NLW patients. Mediation analyses suggest that social support and somatization partially explained the relationship between ethnicity and treatment dropout, highlighting the importance of these variables in understanding treatment disparities.

Exposure therapy acceptability among pregnant Latinas with anxiety: A qualitative content analysis.

OBJECTIVE: Exposure therapy is the frontline treatment for anxiety among adults but is underutilized during pregnancy. We qualitatively assess the prospective acceptability of exposure therapy among pregnant Latinas with elevated anxiety, a group that experiences mental health disparities. METHOD: Pregnant Latinas (N = 25) with elevated anxiety were interviewed regarding their acceptability of exposure therapy following the receipt of an informational clinical video vignette. Interviews were analyzed using deductive content analysis guided by the Theoretical Framework of Acceptability to understand pregnant Latinas' views about exposure therapy. RESULTS: Nineteen themes were identified across seven theoretically driven subdomains of acceptability. Women expressed acceptability enhancing factors for exposure therapy including feeling hopeful about its effects, a belief that treatment could benefit their broader family, and a preference for treatment during pregnancy as opposed to the postpartum period. Women also expressed challenges to exposure therapy acceptability such as managing family reactions to prenatal psychotherapy, conflict with cultural conceptions of the maternal role, and perceived difficulty using exposure for avoidance related to prenatal health. CONCLUSION: Identified themes provide insights about exposure acceptability among pregnant women and can be used to bettter engage Latinas in anxiety interventions, ultimately improving clinical outcomes. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

A structural model examining racism, stress, and psychological symptoms among Arab American adolescents.

OBJECTIVE: Previous minority stress scholarship has investigated racism as both a constituent to stress and as an independent psychosocial stressor. It is generally understood that experiences of racism operate differently to affect mental health outcomes compared to general life stress. Racism is consistently implicated in poor psychological health outcomes among Arab Americans. Experiences of racism may be particularly harmful among Arab American adolescents who are in a critical developmental period. This study tested a minority stress framework among Arab American adolescents by examining the association between racism and psychological symptoms both directly and indirectly via stress. METHOD: The sample included 223 Arab American adolescents whose ages ranged from 13 to 18 (M = 15.63, SD = 1.26; 51.1% boys; 49.3% Lebanese) drawn from the Detroit metropolitan area. Participants responded to measures of racism, stress, and internalizing and externalizing psychological symptoms. RESULTS: The structural equation model provided good model fit to the data and indirect effects testing showed that the association between racism and psychological symptoms via general stress was statistically significant (z = 3.48, p < .001). Greater racism was associated with more psychological symptoms in the presence and absence of general stress. The magnitude of the association between racism and psychological symptoms was attenuated with stress included in the model. The association remained statistically significant and reasonably robust. CONCLUSIONS: Findings support racism as both a unique construct and an adjunct to general stress that is positively correlated with psychological symptoms among Arab American adolescents. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

Attention Bias and Anxiety: The Moderating Effect of Sociocultural Variables in Rural Latinx Youth.

Attention bias confers risk for anxiety development, however, the influence of sociodemographic variables on the relationship between attention bias and anxiety remains unclear. We examined the association between attention bias and anxiety among rural Latinx youth and investigated potential moderators of this relationship. Clinical symptoms, demographic characteristics, and a performance-based measure of attention bias were collected from 66 rural Latinx youth with clinical levels of anxiety (33.3% female; Mage = 11.74; 92.4% Latinx, 7.6% Mixed Latinx). No moderating effects for age or gender were found. Youth below the poverty line displayed an attention bias away from threat in comparison to youth above the poverty line, who displayed an attention bias towards threat. Among youth below the poverty line, this bias away from threat was associated with increased anxiety. Findings highlight the importance of economic adversity in understanding the relationship between attention bias and anxiety.

Discrimination and Internalizing Symptoms in Rural Latinx Adolescents: The Protective Role of Family Resilience.

OBJECTIVE: There is a well-documented relationship between discrimination and increases in internalizing symptoms among rural Latinx youth. Among numerous assets in these adolescents' lives, family resilience emerges as a culturally relevant and robust protective factor. However, it is still unclear whether family resilience is equally protective across different internalizing symptom clusters and whether this buffering effect is independent of other interconnected resilience sources. METHOD: Latinx adolescents from an underserved rural community (n = 444; Mage = 15.74, SDage = 1.22; 51% male) reported on their internalizing symptoms, experiences of discrimination, and sources of resilience. We examined whether perceived family resilience moderated the association between perceived discrimination and self-reported depressive, somatic, and anxiety symptoms over and above adolescents' sex, self-reported level of acculturation, as well as perceived individual and contextual resilience. RESULTS: Analyses showed that perceived discrimination experiences were robustly associated with higher levels of self-reported internalizing symptoms, while perceived family resilience was related to lower self-reported symptomatology. Closer examination revealed that perceived family resilience buffered the negative effects of perceived discrimination on self-reported depression and somatic symptoms, but not anxiety symptoms. CONCLUSIONS: This study addresses a gap in the literature by identifying differential protective effects of family resilience that might be explained by cultural values and practices in rural Latinx families. Findings suggest that interventions that incorporate family members and promote supportive family environments may benefit rural Latinx youth with a broad range of internalizing symptoms.

Person-Centered Cultural Assessment Can Improve Child Mental Health Service Engagement and Outcomes.

OBJECTIVE: Disparities in child mental health service engagement suggest traditional evidence-based practices do not properly consider cultural and contextual factors relevant for marginalized families. We propose a person-centered approach to improve the cultural responsiveness of services. Preliminary research supports broadening standard assessments to include a person-centered evaluation of patient cultural factors, however, controlled studies have not been conducted in the context of children's mental health care. METHODS: Participants included families (N = 89; 89% racial/ethnic minority) receiving services for child externalizing problems. Prior to intake, caregivers were randomized to receive either Assessment as Usual (AAU) or AAU augmented with the Cultural Formulation Interview (CFI+AAU), a brief caregiver assessment of cultural factors affecting their child's problems and family help-seeking. RESULTS: Implementation data showed strong provider fidelity and clinical utility. Following assessments, CFI+AAU caregivers (relative to AAU caregivers) reported feeling better understood by their provider, and providers reported better understanding CFI+AAU families' values. Caregiver satisfaction was rated highly overall, yet providers reported being more satisfied with the assessment when the CFI was incorporated. Engagement outcomes found CFI+AAU families were significantly more likely than AAU families to subsequently complete the first phase of treatment. Further, among families receiving services in Spanish, CFI+AAU, relative to AAU, was associated with significantly higher treatment attendance, homework completion, and treatment response. CONCLUSIONS: The results underscore the utility of incorporating a brief cultural assessment in pretreatment assessments. To improve the cultural responsiveness of services, efforts may do well to promote the uptake of person-centered approaches such as cultural assessment into usual care. Registered at clinicaltrials.gov (NCT03499600).

Postpartum depressive symptoms in low-income Latinas: Cultural and contextual contributors.

OBJECTIVE: Using a conceptual model of postpartum depression risk in Latinas including both contextual and cultural stressors, we tested contributions to depressive symptom levels and trajectories over the course of 1 year following birth in a community sample of Latinas. METHOD: A multisite sample of low-income U.S.-born and foreign-born Latinas (n = 537; M age = 25.70) was interviewed on many topics including measures of stress and maternal health at 1, 6, and 12 months postpartum. Nested multilevel growth curve models were implemented to test associations of contextual stressors (poverty, domestic violence) with trajectories of depressive symptoms, adjusting for confounds. This model was compared to 1 that added cultural stress variables (everyday discrimination, foreign-born status, language preference, age at immigration) measured 1-month postpartum. RESULTS: The best fitting model provided evidence for the independent effects of cultural and contextual stressors. Discrimination (ß = .13 SE = .02, p = < .001) and domestic violence (ß = .39 SE = .09, p = < .001) predicted trajectories with higher levels of depressive symptoms 1 month postpartum, but not linear change in symptoms over the year. CONCLUSIONS: The present study provides evidence that discrimination, a cultural factor, and domestic violence, a contextual factor, each predict higher levels of early postpartum depressive symptoms. Interventions addressing discrimination and maternal safety are recommended. (PsycInfo Database Record (c) 2020 APA, all rights reserved).

Trauma Exposure and Mental Health Symptoms in Rural Latinx Adolescents: The Role of Family Processes.

Previous research suggests that rural Latinx youth are more likely to experience traumatic events and are at higher risk for developing subsequent psychopathology compared to non-Latinx white youth. The aim of this study is to understand how family processes and values affect risk for internalizing and externalizing symptoms among rural Latinx youth (N = 648, mage = 15.7 (SD = 1.2)) who are exposed to trauma. Multiple mediation analyses were performed to understand if family variables such as familism and family conflict explain the relationship between trauma exposure and psychopathology. Results suggest that familism partially mediates the relationship between trauma exposure and internalizing and externalizing symptoms, whereas family conflict partially mediates the relationship between trauma exposure and externalizing symptoms. These findings show that family variables are differentially impacted by trauma and have a separate and unique impact on mental health outcomes among rural Latinx youth. Specifically, our findings suggest that familial support or closeness may constitute a nonspecific protective factor for psychopathology among Latinx youth, whereas family conflict creates a stressful home environment that may deter adolescent trauma recovery and lead specifically to externalizing symptoms.

Psychological interventions for depression and anxiety in pregnant Latina and Black women in the United States: A systematic review.

Black women and Latinas have more symptoms of depression and anxiety during pregnancy than do their non-Latina White counterparts. Although effective interventions targeting internalizing disorders in pregnancy are available, they are primarily tested with White women. This article reviews randomized controlled trials and non-randomized studies to better understand the effectiveness of psychological interventions for anxiety and depression during pregnancy in Latinas and Black women. Additionally, this review summarizes important characteristics of interventions such as intervention format, treatment modality, and the use of cultural adaptations. Literature searches of relevant research citation databases produced 68 studies; 13 of which were included in the final review. Most studies were excluded because their samples were not majority Latina or Black women or because they did not test an intervention. Of the included studies, three interventions outperformed a control group condition and showed statistically significant reductions in depressive symptoms. An additional two studies showed reductions in depressive symptoms from pretreatment to post-treatment using non-controlled designs. The remaining eight studies (seven randomized and one non-randomized) did not show significant intervention effects. Cognitive behavioral therapy was the modality with most evidence for reducing depressive symptoms in pregnant Black and Latina women. No intervention was found to reduce anxiety symptoms, although only two of the 13 measured anxiety as an outcome. Five studies made cultural adaptations to their treatment protocols. Future studies should strive to better understand the importance of cultural modifications to improve engagement and clinical outcomes with pregnant women receiving treatment for anxiety and depression.

Urban Latinx parents' attitudes towards mental health: Mental health literacy and service use.

Latinx youth report elevated internalizing symptomatology as compared to their non-Latinx White counterparts and are less likely to access mental health care for these problems. This qualitative study examined the knowledge, beliefs and perceptions that Latinx parents (86% foreign-born; 66.7% monolingual Spanish speakers) living in urban communities have about mental health and service use for anxiety and depression in children. We used thematic analysis to analyze interview data from 15 Latinx parents who expressed concerns about their child's (age 6-13) worry or sadness. Analyses revealed that Latinx parents often have difficulty identifying mental health problems, report stigma about mental health problems and help-seeking and want more information about how they can help their children. Although Latinx parents report significant mental health and treatment-seeking stigma, the majority were open to seeking mental health services for their children or were already receiving services. Findings suggest that stigma although prevalent, may not deter service utilization for some Latinx families. Implications for community health and future research are discussed.

Family factors mediate discrimination related stress and externalizing symptoms in rural Latino adolescents.

INTRODUCTION: Externalizing disorders are more prevalent in rural than urban settings and account for disproportionately high mental health service costs for rural adolescents. Although cultural stressors such as discrimination have been associated with externalizing problems in ethnic minority youth broadly, this relationship is understudied in Latinos, particularly those in rural settings. Further, though the associations of family processes such as familism and family conflict have been studied in relation to youth externalizing symptoms, whether these processes change in the face of adolescent discrimination stress remains unknown. METHODS: A moderated multiple mediation model was used to examine the association between perceived discrimination, externalizing symptoms, and the indirect effect of family factors (familism, and family conflict) in a large sample (n = 455) of rural Latino youth. We also evaluated whether indirect and direct effects of discrimination on externalizing symptoms differed in boys versus girls. RESULTS: Familism and family conflict each independently mediated the relationship between discrimination related stress and externalizing symptoms. However, discrimination had a direct effect on externalizing symptoms for boys only. In girls, this association held only when family factors were accounted for. Post-hoc analyses reveal that the moderating effect of sex on discrimination is driven by differences in rule-breaking behavior, as opposed to aggressive behavior. CONCLUSION: Findings suggest that discrimination is associated with changes in the family environment which in turn invoke elevated risk for externalizing problems. Further, family-focused interventions that address externalizing problems may be especially effective for adolescent girls.

Telephone-assisted, parent-mediated CBT for rural Latino youth with anxiety: A feasibility trial.

OBJECTIVE: In this study, we tailor a child anxiety cognitive-behavior therapy (CBT) program to fit the needs of rural Latino/a Spanish-speaking families and examine the feasibility, acceptability, tolerability, and safety of this intervention using 2 modes of service delivery. METHOD: Children (n = 31; age 8-13) with anxiety disorders were recruited from primary care settings and randomized to 1 of 2 modes of parent-mediated CBT bibliotherapy: (1) telephone-delivered, therapist-assisted bibliotherapy (TTB; n = 15), and (2) a more minimal contact, self-directed, bibliotherapy condition (SB; n = 16). Independent evaluators administered a diagnostic interview at baseline and posttreatment; demographic and engagement-related questionnaires were also administered. RESULTS: In the TTB group, 10 of 15 parents (66.7%) completed the requisite number of therapist-assisted bibliotherapy sessions, and in the SB group, 4 of 16 parents (25%) completed the requisite number of self-directed bibliotherapy modules; this comparison was significant, χ2(1) = 5.43, p = .02. In the TTB condition, treatment length and session duration were longer than reported in previous studies. Barriers that were most strongly endorsed were stressors and obstacles competing with treatment, as well as treatment demandingness. Findings revealed good satisfaction across the conditions, although ratings were significantly higher in the TTB group, F = 5.67, p = .028. Remission rates (i.e., no anxiety disorder) for those that provided posttreatment data (N = 25) were 50% and 36% for the TTB and SB groups, respectively, χ2(1) = .465, p = .50. CONCLUSIONS: Implications of these feasibility findings and suggestions for future research are discussed. (clinicaltrials.gov unique identifier: NCT01491880). (PsycINFO Database Record

Mobilizing Community Health Workers to Address Mental Health Disparities for Underserved Populations: A Systematic Review.

This systematic review evaluates efforts to date to involve community health workers (CHWs) in delivering evidence-based mental health interventions to underserved communities in the United States and in low- and middle-income countries. Forty-three articles (39 trials) were reviewed to characterize the background characteristics of CHW, their role in intervention delivery, the types of interventions they delivered, and the implementation supports they received. The majority of trials found that CHW-delivered interventions led to symptom reduction. Training CHWs to support the delivery of evidence-based practices may help to address mental health disparities. Areas for future research as well as clinical and policy implications are discussed.

Age Differences in Death and Suicidal Ideation in Anxious Primary Care Patients.

OBJECTIVES: The objective of this study was to examine age differences in the likelihood of endorsing of death and suicidal ideation in primary care patients with anxiety disorders. METHOD: Participants were drawn from the Coordinated Anxiety Learning and Management (CALM) Study, an effectiveness trial for primary care patients with panic disorder (PD), generalized anxiety disorder (GAD), post-traumatic stress disorder (PTSD), and/or social anxiety disorder (SAD). RESULTS: Approximately one third of older adults with anxiety disorders reported feeling like they were better off dead. Older adults with PD and SAD were more likely to endorse suicidal ideation lasting at least more than half the prior week compared with younger adults with these disorders. Older adults with SAD endorsed higher rates of suicidal ideation compared with older adults with other anxiety disorders. Multivariate analyses revealed the importance of physical health, social support, and comorbid MDD in this association. CONCLUSIONS: Suicidal ideation is common in anxious, older, primary care patients and is particularly prevalent in socially anxious older adults. Findings speak to the importance of physical health, social functioning, and MDD in this association. CLINICAL IMPLICATIONS: When working with anxious older adults it is important to conduct a thorough suicide risk assessment and teach skills to cope with death and suicidal ideation-related thoughts.

Integrated Primary Medical-Behavioral Health Care for Adolescent and Young Adult Depression: Predictors of Service Use in the Youth Partners in Care Trial.

Objectives: Depression, a chronic and disabling condition, frequently has its first onset during adolescence, underscoring the value of early effective treatment and prevention. Integrated medical-behavioral health care provides one strategy for improving treatment access for adolescents and young adults (AYA). Methods: This study examined predictors of accessing treatment in a multisite randomized controlled trial evaluating an integrated collaborative care intervention aimed at improving access to evidence-based depression treatment through primary health care, compared with usual care. Results: The integrated care intervention was able to overcome barriers to care associated with an initial reluctance to pursue active treatment and older age. Service use was low in both conditions among less acculturated/non-English-speaking families. Conclusions: Results support the value of integrated medical-behavioral health care for improving rates of care. Findings highlight mechanisms by which integrated care may lead to improved rates of care and outcomes for AYA, an underserved and understudied group.

Delivering CBT to Rural Latino Children with Anxiety Disorders: A Qualitative Study.

Qualitative methods were used to understand community perspectives about ways to deliver cognitive behavior therapy (CBT) to rural Latino youth with anxiety. First, four focus groups were conducted with 28 bilingual Latino mental health providers to examine perceptions of CBT using telephone based, therapist supported bibliotherapy, and bibliotherapy without therapist support. Second, qualitative interviews were conducted with 15 Latino parents from a rural community to better understand attitudes toward CBT, and modes of service delivery. Qualitative findings revealed that parents were mostly positive about psychotherapy, and the core elements of CBT for anxiety. However, both parents and providers emphasized the need for adaptations to address practical and perceived barriers to treatment, such as time, convenience, homework, and literacy. Many parents spoke favorably of a telephone-based approach that could address many of their perceived barriers, while providers were expressed more negative views. Such findings are important for data-driven treatment development efforts.

Parent-reported stigma and child anxiety: A mixed methods research study.

BACKGROUND: Stigma has been frequently cited as a barrier to service use for various mental health problems. Studies suggest that stigma may be greater for childhood mental health problems that are perceived as more atypical. AIMS: This study utilized a mixed methods research design (qual + QUAN) to examine parental endorsement of stigma and its impact on service utilization among children with significant anxiety-a common childhood problem frequently perceived as normative. METHODS: Semi-structured qualitative interviews were conducted with 29 parents of anxious children. Qualitative data were coded using a grounded theory approach, and stigma-related responses were examined for emergent themes. Quantitative data was analyzed with frequency counts and chi-square analysis. RESULTS: Stigma related to children's anxiety symptoms and seeking mental health services was reported by 41.3% (n = 12) of parents. Emergent themes included: 1) Parental Concern for Negative Consequences, 2) Parent Internalized Stigma, and 3) Negative Associations with Mental Health Treatment. Latino parents discussed stigma more frequently than non-Latino White parents (70% vs. 17.6%, respectively, X2(1, N = 27) = 5.33, p < 0.05). CONCLUSIONS: Although anxiety is a common childhood problem, stigma is still frequently reported by parents and may be an important barrier to mental health service use, especially among Latino youth.

Partitioning the heritability of Tourette syndrome and obsessive compulsive disorder reveals differences in genetic architecture.

The direct estimation of heritability from genome-wide common variant data as implemented in the program Genome-wide Complex Trait Analysis (GCTA) has provided a means to quantify heritability attributable to all interrogated variants. We have quantified the variance in liability to disease explained by all SNPs for two phenotypically-related neurobehavioral disorders, obsessive-compulsive disorder (OCD) and Tourette Syndrome (TS), using GCTA. Our analysis yielded a heritability point estimate of 0.58 (se = 0.09, p = 5.64e-12) for TS, and 0.37 (se = 0.07, p = 1.5e-07) for OCD. In addition, we conducted multiple genomic partitioning analyses to identify genomic elements that concentrate this heritability. We examined genomic architectures of TS and OCD by chromosome, MAF bin, and functional annotations. In addition, we assessed heritability for early onset and adult onset OCD. Among other notable results, we found that SNPs with a minor allele frequency of less than 5% accounted for 21% of the TS heritability and 0% of the OCD heritability. Additionally, we identified a significant contribution to TS and OCD heritability by variants significantly associated with gene expression in two regions of the brain (parietal cortex and cerebellum) for which we had available expression quantitative trait loci (eQTLs). Finally we analyzed the genetic correlation between TS and OCD, revealing a genetic correlation of 0.41 (se = 0.15, p = 0.002). These results are very close to previous heritability estimates for TS and OCD based on twin and family studies, suggesting that very little, if any, heritability is truly missing (i.e., unassayed) from TS and OCD GWAS studies of common variation. The results also indicate that there is some genetic overlap between these two phenotypically-related neuropsychiatric disorders, but suggest that the two disorders have distinct genetic architectures.