Beyond troubled and untroubled positions - an intersectional analysis of siblings who are bereaved by drug-related deaths' meaning-making stories about their deceased brothers and sisters.

PURPOSE: This study investigates how social categories work and intersect in siblings bereaved by drug-related deaths' (DRDs) stories about their relationships to their deceased brother or sister. The sociocultural embedded process of making meaning of the relationship with the deceased individual is essential in adapting to the loss. However, insight into such experiences of siblings bereaved by a DRD is scarce. Previous research has suggested that DRDs may be stigmatized life experiences for bereaved family members, and this paper furthers understanding of the experiences and issues involved in losing a sibling in a stigmatized death. METHODS: An intersectional analysis is applied to interviews with 14 bereaved siblings. By investigating and displaying how different categories intertwine, various positionings are identified. FINDINGS: Categorization of the deceased siblings as "addicts" constructs a troubled position. However, when "addict" intersects with the categories "unique," "sibling," and "uncle," the troubled subject's position as an "addict" can be concealed. CONCLUSIONS: Normative conceptions of addiction and DRDs produce troubled subject positions. By intermingling the category of "addict" with other categories, less problematic positions are created. Still, intersections of categories can also construct further complexities of remorse and self-blame for the bereaved siblings.

Qualitative Protocol of Chinese Parents and Siblings Experiences of Managing Challenging Behaviours of Adult Persons with Intellectual Disability in Hong Kong and Northern China.

BACKGROUND: While the literature has highlighted the immense challenges in caring for family members, it is still unclear what the needs of family carers of persons with intellectual disability and challenging behaviours are and what has worked for them. This study aims to examine 60 parents' and siblings' experiences in managing the challenging behaviours of their adult family member with intellectual disability whilst living at home. METHODS: A qualitative grounded theory approach using semi-structured interviews will be adopted. Purposive sampling will be used to recruit family carers who live with adult persons with intellectual disability and use one community service in Hong Kong. Three special schools for persons with intellectual disability from northern China will be approached. RESULTS: This study will aim to provide an in-depth understanding of the experiences of family carers and compare the different circumstances they face when managing the challenging behaviours of their adult relatives with intellectual disability in their family home. CONCLUSIONS: Although this study targets adults with intellectual disability, the findings will provide a point of reference for adolescents and younger persons who exhibit demanding and challenging behaviours and live with their families. Recommendations can guide the development of appropriate strategies to strengthen services for family carers.

Medical Decision-Making for Children in Families with Siblings: parental discretion and its limits.

This article examines how parents should make health decisions for one child when they may have a negative impact on the health interests or other interests of their siblings. The authors discuss three health decisions made by the parents of Alex Jones, a child with developmental disabilities with two older neurotypical siblings over the course of eight years. First, Alex's parents must decide whether to conduct sequencing on his siblings to help determine if there is a genetic cause for Alex's developmental disabilities. Second, Alex's parents must decide whether to move to another town to maximize the therapy options for Alex. Third, Alex's parents must decide whether to authorize the collection of stem cells from Alex for a bone marrow transplant for his sibling who developed leukemia. We examine whether the consensus recommendations by Salter and colleagues (2023) regarding pediatric decision-making apply in families with more than one child.

Opposites attract? Mixed-sex parents' and siblings' sport participation differentiates youth athletes' perceived parenting climates.

Guided by family systems and achievement goal theories, this study examined how the sex of athletes and their main sport parents, as well as sport participation patterns (same sport, different sports, and no sports) of parent-athlete and sibling sex compositions (same-sex and mixed-sex), differentiated athlete perceptions of parenting climates-task-involving (emphasizing individual improvements, effort, and mastery) and ego-involving (emphasizing winning and performance comparison). Participants were 353 U.S. high school athletes (Mage = 15.52 and SD = 1.18; 55% male) who completed a survey on perceived parenting climates, family compositions, and sport backgrounds of their parents and siblings. We conducted six moderated regression analyses, two of which used (1) athlete sex and main sport parents' sex, (2) sport participation patterns of parent-athlete sex compositions, or (3) sport participation patterns of sibling sex compositions as independent variables. Four of the analyses were statistically significant with small effect sizes, showing that (1) boys perceived greater ego-involving climates than girls; (2) athletes whose same-sex parents played sports (same or different sports) compared to no sports-perceived greater task-involving climates: (3) athletes whose mixed-sex parents played (same or different sports) compared to no sports-perceived greater task-involving climates and less ego-involving climates; and (4) athletes whose mixed-sex siblings played different sports than they did, compared no sports, and perceived greater task-involving climates. None of the interactions were significant. Findings provide theoretical and practical implications by incorporating motivational climates, addressing the potential relationships of parents' and mixed-sex siblings' sport participation to adaptive parenting climates.

Sibling-Support for Adolescent Girls (SSAGE): A study protocol for a pilot randomized-controlled trial of a whole-family, gender transformative approach to preventing mental illness among forcibly displaced adolescent girls.

BACKGROUND: Forcibly displaced adolescents face increased risks for mental illness and distress, with adolescent girls disproportionately affected in part due to heightened gender inequity. Although the family unit has the potential to promote healthy development in adolescents, few family interventions have employed a gender transformative approach or included male siblings to maximize benefits for adolescent girls. METHODS: This study will assess a whole-family and gender transformative intervention-Sibling Support for Adolescent Girls in Emergencies (SSAGE)-to prevent mental health disorders among adolescent girls in Colombia who were recently and forcibly displaced from Venezuela. The study will employ a hybrid type 1 effectiveness-implementation pilot randomized control trial (RCT) to test the program's effectiveness to explore determinants of implementation to establish the feasibility, acceptability, and fidelity of SSAGE. To address these aims, we will enroll 180 recently arrived, forcibly displaced adolescent girls in an RCT and examine the program's effectiveness in the prevention of mental illness (through reduction in anxiety, depression, interpersonal sensitivity, and somatization symptoms) one-month post-intervention. We will use contextually adapted to collect data on the hypothesized mechanistic pathways, including family attachment, gender-equitable family functioning, self-esteem, and coping strategies. The implementation evaluation will employ mixed methods to assess the program's feasibility, acceptability, fidelity, and barriers and facilitators to successful implementation. DISCUSSION: Findings can support humanitarian program implementation, as well as inform policy to support adolescent girls' mental health and to prevent the myriad disorders that can arise as a result of exposure to displacement, conflict, and inequitable gender norms.

Sibling adjustment to diabetes and educational needs: A literature review.

ABSTRACT: As cases of type 1 diabetes mellitus (T1DM) increase, so do their impact on sibling relationships. This literature review of four databases from 2010 to 2024 discusses findings from five studies and the themes that emerged: education needs and family functioning. Improvements in family-centered care and education are needed for siblings of children with T1DM.

Assessing structural models of neighborhood and family sociodemographic characteristics and their relations with externalizing psychopathology.

Externalizing psychopathology has been found to have small to moderate associations with neighborhood and family sociodemographic characteristics. However, prior studies may have used suboptimal operationalizations of neighborhood sociodemographic characteristics and externalizing psychopathology, potentially misestimating relations between these constructs. To address these limitations, in the current study we test different measurement models of these constructs and assess the structural relations between them. Using a population-representative sample of 2,195 twins and siblings from the Georgia Twin Study and data from the National Neighborhood Data Archive and 2000 U.S. Census, we assessed the fit of competing measurement models for family sociodemographic, neighborhood sociodemographic, and neighborhood environment characteristics. In structural models, we regressed a general externalizing dimension on different operationalizations of these variables separately and then simultaneously in a final model. Latent variable operationalizations of family sociodemographic, neighborhood sociodemographic, and neighborhood environment characteristics explained no more variance in broad externalizing psychopathology than other operationalizations. In an omnibus model, family sociodemographic characteristics showed a small association with externalizing psychopathology, while neighborhood sociodemographic and environmental characteristics did not. Family sociodemographic characteristics showed small associations with neighborhood sociodemographic and environmental characteristics, and neighborhood sociodemographic characteristics were moderately associated with neighborhood environment. These findings suggest that family sociodemographic characteristics are more associated with the development of broad externalizing psychopathology in youth than neighborhood sociodemographic characteristics and neighborhood environment. (PsycInfo Database Record (c) 2024 APA, all rights reserved).

Familial Abuse During Childhood and Later-Life Health: Exploring the Role of Victim-Perpetrator Relationships.

OBJECTIVES: Childhood abuse has been extensively studied in relation to later-life health, yet relatively little attention has been given to understanding the nuanced dynamics across victim-perpetrator relationships. This study addresses this gap by identifying typologies of familial perpetrators of childhood abuse in a national sample and examining their associations with various health outcomes, including physical and mental health as well as substance abuse. METHODS: We used 2 waves of data from the Midlife in the US Study (n = 6,295, mean age = 46.9 at baseline). The analysis was completed in 3 stages. Using Latent Class Analysis (LCA), we identified subpopulations of victims with distinct familial perpetrator histories. With assigned LCA memberships and propensity score weighting, we investigated the extent to which specific victim-perpetrator relationships are associated with health outcomes measured at baseline and a 10-year follow-up adjusting for other early-life risks. We evaluated whether the observed associations differ across the waves. RESULTS: Parental and sibling abuse commonly co-occur, surpassing the occurrence of single perpetrators. Although minimal health disparities are evident between sibling-only abuse and no/little abuse groups at baseline, parent-only abuse is associated with compromised health outcomes. Severe abuse from both siblings and parents is linked to the most adverse health outcomes. At the follow-up survey, the associations between familiar abuse and health outcomes weakened, particularly for substance abuse. DISCUSSION: This study, delving into family relationships, family violence, and health disparities, provides new evidence to augment our comprehension of the enduring link between childhood abuse and health within the family context.

"We want to include him in that journey": A qualitative descriptive study of parental experiences and considerations for sibling inclusion in the paediatric ICU.

OBJECTIVES: Siblings are an important yet often forgotten part of the paediatric intensive care unit (PICU) family experience. Commonly, siblings are supported through the experience by their parents; however, very little is known about parental experiences of providing this support. This study aims to explore parental experiences of supporting sibling inclusion in PICU. RESEARCH METHODOLOGY/DESIGN: This study utilised a qualitative descriptive approach to conduct semi-structured interviews with 6 parents of 5 children with congenital heart disease who had spent time in PICU. Data were analysed using reflexive thematic analysis. SETTING: Australian PICUs. FINDINGS: Parental considerations and experiences for sibling inclusion were identified across three key phases: Pre-inclusion, The PICU visit, and Post-inclusion. Prior to including siblings in PICU, parents considered various ways of sharing information with siblings, and weighed up the risks and benefits of bringing siblings into PICU. Parents also recounted a number of challenges and facilitators to a positive sibling experience in PICU, including supportive staff and fun activities. Finally, parents, identified that siblings require ongoing support after their inclusion in PICU and made suggestions for ongoing availability of information and supportive resources. CONCLUSIONS: This study has illuminated key parental experiences when supporting sibling inclusion in PICU before, during and after their visit. By understanding these parental experiences, PICU staff can work with and support parents where needed, helping to achieve a positive sibling inclusion experience. IMPLICATIONS FOR CLINICAL PRACTICE: Parents need ongoing support to explain the PICU to siblings of critically ill children and may benefit from specific visual resources to aid communication. In addition, PICUs should aim to ensure the physical layout is supportive of sibling needs, with dedicated spaces for siblings to play and take time out during their experience.

Using emulated clinical trials to investigate the risk of being diagnosed with psychiatric ill health following the cancer diagnosis of a sibling.

BACKGROUND: The sibling bond is often the longest relationship in an individual's life, spanning both good and bad times. Focusing on the latter, we investigated whether a cancer diagnosis in one adult sibling is predictive of psychiatric illness in the other, and if any such effect differs according the 'sociodemographic closeness' between the siblings in terms of sex, age, education, marital status and residence. METHODS: We used hospital records to identify psychiatric diagnoses (2005-2019) in a Swedish total-population cohort born in 1953, and cancer diagnoses (2005-2017) in their full siblings. By means of emulated clinical trials, the cohort member's risk of a diagnosis within two years following a first exposure (or non-exposure) to a sibling's cancer was analyzed through Cox regression. RESULTS: Exposed cohort members had a higher risk of psychiatric diagnosis than unexposed (HR = 1.15; CI: 1.08-1.23), with men displaying a higher risk (1.19; CI: 1.09-1.31) than women (HR = 1.11; CI: 1.01-1.22). Sub-analyses of the exposed group showed that women with a cancer-stricken sister had a higher risk of adverse psychiatric outcomes (HR = 1.31; CI: 1.07-1.61) than women with a cancer-stricken brother. Furthermore, unmarried cohort members ran a higher risk, both when the cancer-stricken sibling was married (HR = 2.03; CI: 1.67-2.46) and unmarried (HR = 2.61; CI: 2.16-3.15), than in cases where both siblings were married. No corresponding difference were detected for 'closeness' in age, education and residence. CONCLUSIONS: In line with theories of linked lives, our findings suggest that negative events in one sibling's life tend to 'spill over' on the other sibling's wellbeing, at least during the 15-year-long period leading up to retirement age.

The feeding siblings questionnaire (FSQ): Development of a self-report tool for parents with children aged 2-5 years.

Over the last decade, there have been repeated calls to expand the operationalisation of food parenting practices. The conceptualisation and measurement of these practices has been based primarily on research with parent-child dyads. One unexplored dimension of food parenting pertains to the evaluation of practices specific to feeding siblings. This study describes the development and validation of the Feeding Siblings Questionnaire (FSQ) - a tool designed to measure practices in which siblings are positioned as mediators in parents' attempts to prompt or persuade a child to eat. Item development was guided by a conceptual model derived from mixed-methods research and refined through expert reviews and cognitive interviews. These interviews were conducted in two phases, where parents responded to the questionnaire primarily to test i) the readability and relevance of each item, and ii) its overall feasibility. The instrument was completed by 330 parents (96.1% mothers) in Australia with two children aged 2-5 years, and repeated by 133 parents (40.3%) two weeks later. Exploratory factor analysis was performed on baseline data. Internal consistency and test re-test reliability of the subsequent subscales were examined. Construct validity was assessed through comparisons with existing measures of food parenting practices and child eating behaviours. The final FSQ scale included 22 items, reflecting five food parenting practices: sibling competitiveness, active sibling influence, threatening unequal division of food, sibling role modelling, and vicarious operant conditioning. Internal consistency and test re-test reliability estimates were high, and there was some evidence of convergent construct validity. While its factor structure should be confirmed in a different sample, the FSQ offers a novel tool for assessing, monitoring, and evaluating feeding interactions beyond those confined to the parent-child dyad.

Development of a blueprint for sibling psychosocial services: A nationwide study.

BACKGROUND: Siblings of youth with cancer have heightened risk for poor long-term psychosocial outcomes. Although sibling psychosocial care is a standard in pediatric oncology, this standard is among those least likely to be met. To address barriers to providing sibling services, a blueprint for systematic psychosocial screening and support of siblings was developed based on feedback from a national sample of psychosocial providers. PROCEDURE: Semi-structured interviews were conducted with a purposive sample of psychosocial care providers (N = 27) of various disciplines working in US pediatric cancer centers, varied in size, type, and extent of sibling support. Interviews queried providers' suggestions for the future of sibling psychosocial care and impressions of a blueprint for sibling service delivery, which was iteratively refined based on respondents' feedback. Interviews were analyzed using applied thematic analysis. RESULTS: Based on existing literature and refined according to providers' recommendations, the Sibling Services Blueprint was developed to provide a comprehensive guide for systematizing sibling psychosocial care. The blueprint content includes: (i) a timeline for repeated sibling screening and assessment; (ii) a stepped model of psychosocial support; (iii) strategies for circumventing barriers to sibling care; and (iv) recommendations for how centers with varying resources might accomplish sibling-focused care. The blueprint is available online, allowing providers to easily access and individualize the content. Providers indicated enthusiasm and high potential utility and usability of the blueprint. CONCLUSIONS: The Sibling Services Blueprint may be a useful tool for systematizing sibling psychosocial care, promoting wider availability of sibling-focused services, and addressing siblings' unmet needs.

Response to psychotic experiences: Impact of personality traits on perceived levels of distress.

BACKGROUND: This study examined the influence of personality traits on (subclinical) positive symptom distress in patients with a psychotic disorder, their unaffected siblings and healthy controls. METHODS: Data were obtained from the Genetic Risk and Outcome of Psychosis study (GROUP), a Dutch longitudinal multicenter cohort study. Data from 140 patients, 216 unaffected siblings and 102 healthy controls was available for baseline levels of Five Factor Model personality traits and frequency and distress due to psychotic experiences three years later, assessed with the Community Assessment of Psychic Experience questionnaire. Main effects of all five personality traits on symptom distress were investigated as well as moderating effects of Neuroticism, Extraversion and Openness on positive symptom frequency and positive symptom distress. Age, gender, symptom frequency and IQ were controlled for. RESULTS: In both patients and siblings, the observed main effects of Neuroticism and Openness on (subclinical) positive symptom distress three years later either lost significance or had a very small effect size when controlling for covariates, mainly due to the correction for the effect of positive symptoms on personality traits at baseline. In both groups, levels of Openness at baseline moderated the association between positive symptom frequency and positive symptom distress three years later, in the direction that higher levels of Openness were associated with weaker associations between positive symptom frequency and - distress, even when covariates were controlled for. DISCUSSION: The level of Openness to Experiences influences the perceived distress from (subclinical) positive symptoms in both patients and siblings.

From classroom to life: Gender differences in the persistent effect of learning disabilities on adult depressive symptoms.

Despite the well-established link between adolescent learning disabilities (LD) and mental health, little is known about its long-term consequences. This study examines the relationship between adolescent LD and adult depressive symptoms, with a focus on gender differences and underlying mechanisms. Using a sibling sample from the National Longitudinal Study of Adolescent to Adult Health (N = 3,414), this study estimated sibling fixed effects models to account for unobserved family-level characteristics such as genes and early childhood family and social context. Sobel mediation analyses were conducted to examine social-psychological mechanisms, including the student-teacher relationship, the student-student relationship, and a sense of school belonging. LD in adolescence was positively associated with depressive symptoms in adulthood (b = 0.823, p < 0.05). This association remained robust when controlling for unobserved family-level confounders as well as educational attainment in adulthood. Gender-stratified models showed that only the association for women is statistically significant (b = 1.935, p < 0.05), and its magnitude is nearly three times that of the association for men. Sobel mediation tests indicate that a decline in a sense of school belonging mediates approximately 17% of the association between adolescent LD and adult depressive symptoms. This study's findings suggest that LD in adolescence is associated with an increase in depressive symptoms in adulthood, particularly in women, and a low sense of school belonging may be a potential mediator. Implementing interventions to improve the school integration of girls with LD could be an effective means of improving their long-term mental health.

Association of Very Low Birth Weight Infants With Parental and Sibling Mental Health Care Usage.

BACKGROUND AND OBJECTIVES: Parents and siblings of very low birth weight, premature infants are at risk for poor mental health outcomes with increased mental health care usage. Knowledge regarding mental health care use patterns could guide interventions. METHODS: This retrospective cohort study included US families with commercial insurance coverage from a single carrier. Neonates born at ≤30 weeks' gestational age or with a birth weight <1500 g were identified by insurance claim data between July 1, 2015, and June 30, 2016. Each case neonate family was matched with up to 4 control families. RESULTS: The study included 1209 case and 1884 control neonates (with 134 deaths among only the case neonates [11.1% of cases]); 2003 case and 3336 control parents (mean [SD] age, 34.6 [5.4] years; 2858 [53.5%] female); and 884 case and 1878 control siblings (mean [SD] age, 6.8 [5.5] years; 1375 [49.8%] female). Compared with controls, more case parents used mental health care over the first year after birth hospitalization discharge. Higher usage was observed for bereaved case parents soon after their child's death. A smaller proportion of bereaved case siblings received mental health care compared with controls. Although nonbereaved case parents returned toward the proportion of use observed in controls, nonbereaved case female siblings, bereaved case female and male siblings, and bereaved male parents experienced continued differences. CONCLUSIONS: Understanding and meeting the mental health care needs of parents and siblings of very low birth weight premature neonates can be guided by these findings, including elevated and prolonged needs of bereaved parents and siblings.

Associations between the number of siblings, parent-child relationship and positive youth development of adolescents in mainland China: A cross-sectional study.

BACKGROUND: Positive development plays an important role in youth when dealing with stressful circumstances. According to the resource dilution theory, adolescents with or without siblings may receive different levels of emotional and material resources from their parents. The purpose of this study is to examine the association between the positive development of adolescents in China today with their family characteristics such as the number of siblings. METHODS: A total of 2072 junior high and senior high school students (13 to 18 years old) in Chengdu, Sichuan, China, were investigated by cluster sampling. The Chinese Positive Youth Development scales (CPYDs) were used to measure positive youth development. The generalized linear model was used to explore the relationships among the number of siblings, parent-child relationships and positive youth development. RESULTS: Adolescents from only-child families had better performance on positive development (H = 21.87, P < 0.001) and better relationships with parents (H = 15.1, P < 0.05). The positive development of male and female adolescents does not significantly differ in families with different numbers of siblings. The generalized linear model showed that a positive parent-child relationship is positively correlated with adolescent positive development (P < 0.05). CONCLUSION: Positive youth development is not only associated with the number of siblings but also other modifiable familial factors. The positive relationship between parents and adolescents is of great practical value in daily life to improve youth development, and this might be the real lesson the resource dilution theory tells.

'People don't realise how much their past experiences affect them in adulthood': A qualitative study of adult siblings' experiences of growing-up with a sister/brother with a childhood life-limiting condition and their perceived support needs.

BACKGROUND: There is a lack of research about the experiences and impact of having a sibling with a life-limiting condition. Studies focus on the sibling experience during childhood but the experience and impact during adulthood is unknown despite the increased life-expectancy of children with life-limiting conditions. AIM: To explore adult siblings' perspectives on the experience of having a sister/brother with a childhood life-limiting condition and to identify their perceived needs and preferences for support. DESIGN: A qualitative exploratory study design with data generated by semi-structured interviews and analysed using reflexive thematic analysis, underpinned by interpretivism. SETTING/PARTICIPANTS: Twenty-two siblings (17-42 years old) were recruited via a children's hospice in England. RESULTS: The experience of having a sibling with a life-limiting condition changes over time in response to how understandings of the meaning of a life-limiting condition develop and changing roles/relationships with parents and siblings. These experiences have an enduring impact on adult sibling's mental health which is compounded by their unmet (and sometimes unrecognised) support needs in adolescence and adulthood. Siblings described the importance of support continuing into adulthood with a focus on the provision of psychotherapy and peer support. CONCLUSIONS: Having a sister/brother with a childhood life-limiting condition appeared to have a significant and ongoing impact on adult siblings but their support needs, particularly for psychotherapy and peer support, are overlooked. The findings highlight the importance of ensuring siblings are included in family assessments and that family-based interventions are developed to promote sibling-parent relationships.

What challenges do siblings of children with chronic disorders express to their parents? A thematic analysis of 73 sibling-parent dialogues.

PURPOSE: The study explored challenges experienced by siblings of children with chronic disorders, as expressed by siblings in parent-child dialogues. DESIGN AND METHODS: Seventy-three parent-child dialogues (M duration = 28.6 min) were analyzed using qualitative thematic analysis. The dialogues took place within the SIBS group intervention for siblings and parents of children with chronic disorders. The siblings (aged 8 to 14 years) had brothers and sisters with autism spectrum disorders, ADHD, rare disorders, cerebral palsy, or severe mental health disorders. The data are from session 5 in the SIBS intervention, in which the siblings are to express their wishes about family-related challenges (e.g., desired changes) to their parents. The parents are encouraged to listen, explore, and validate the child's perspective before discussing solutions. RESULTS: Most of the family-oriented challenges the siblings expressed were related to the diagnosis of the brother or sister with a disorder. Four main themes were identified: (1) Family life (e.g., limitations in family activities); (2) The diagnosis (e.g., concerns about the future); (3) Violence; and (4) Important relationships. CONCLUSION: The siblings experienced challenges and difficult emotions in interactional processes in which the diagnosis affected family life and relationships. The study adds a new dimension to the field by identifying siblings' expressed challenges based on parent-child dialogues. PRACTICE IMPLICATIONS: Identified themes can guide how parents should meet and address siblings' needs, how health care providers inform and support parents in doing so, and emphasize the relevance of interventions targeting family-level risk and resilience factors.

Mental Disorders Among Adolescents and Young Adults With Cancer: A Canadian Population-Based and Sibling Cohort Study.

PURPOSE: To compare the cumulative incidence of mental disorders among adolescents and young adults (AYAs) diagnosed with cancer with the general population and their unaffected siblings. METHODS: A retrospective, population-based, matched cohort design was used to investigate the impact of cancer diagnosis on mental disorders among individuals age 15-39 diagnosed between 1989 and 2019. Two cancer-free cohorts were identified: matched population-based and sibling cohorts. Outcomes included incidence of mood and anxiety disorders, substance use disorders, suicide outcomes, psychotic disorders, and any of the preceding four categories within 5 years of cancer diagnosis. Competing risk regression was used to estimate adjusted subhazard ratios (aSHR) and 95% CIs. RESULTS: Among 3,818 AYAs with cancer matched to the population-based cancer-free cohort, individuals with cancer were more likely to be diagnosed with incident mental disorders than those without cancer; the risk was highest immediately after a cancer diagnosis and decreased over time with aSHR [95% CI] for mood and anxiety disorders at 0-6 months (11.27 [95% CI, 6.69 to 18.97]), 6-12 months (2.35 [95% CI, 1.54 to 3.58]), and 12-24 months (2.06 [95% CI, 1.55 to 2.75]); for substance use disorders at 0-6 months (2.73 [95% CI, 1.90 to 3.92]); for psychotic disorders at 0-6 months (4.69 [95% CI, 2.07 to 10.65]); and for any mental disorder at 0-6 months (4.46 [95% CI, 3.41 to 5.85]), 6-12 months (1.56 [95% CI, 1.14 to 2.14]), and 12-24 months (1.7 [95% CI, 1.36 to 2.13]) postcancer diagnosis. In sibling comparison, cancer diagnosis was associated with a higher incidence of mood and anxiety and any mental disorder during first 6 months of cancer diagnosis. CONCLUSION: AYAs with cancer experience a greater incidence of mental disorders after cancer diagnosis relative to population-based and sibling cohorts without cancer, primarily within first 2 years, underscoring the need to address mental health concerns during this period.