Peter Szatmari
Biographic Data
| ID | 199673 |
|---|---|
| NAME | Peter Szatmari |
| GIVEN NAMES | Peter |
| FAMILY NAME | Szatmari |
| SIGNATURE | SZATMARI P |
| AFFILIATIONS | Centre for Addiction and Mental Health |
| ORCID | 0000-0002-1763-067X |
| VERIFIED | Yes |
| TOTAL WORKS | 37 |
| TOTAL CITATIONS | 11 |
| AUTHOR COUNT | 37 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 1989 |
| LATEST PUBLICATION YEAR | 2026 |
| H-INDEX | 1 |
Initial diagnosis patterns of coexisting mental health and neurodevelopmental conditions in autistic children and youth
BACKGROUND: Elevated prevalence of coexisting health conditions has been observed in autistic people, yet how the timing of their initial diagnoses varies by sex and age of autism diagnosis remains understudied. Using a person-centered approach, we examined the patterns of initial diagnosis for mental health and neurodevelopmental conditions among autistic children and youth identified from the general population. METHODS: The sample was drawn fr…
Research Review
BACKGROUND: Mental health symptoms affect children and youths' functioning, quality of life (QOL), and well-being in daily life. While this 'life impact' is a critical outcome, there is a lack of conceptual clarity and widely endorsed outcome measurement instruments (OMI) to support consistent assessment across studies. This scoping umbrella review sought to map OMIs that assess life impact through measures of functioning, QOL, or well-being. Spe…
Trajectories of parent criticism across treatment for youth self‐harm
BACKGROUND: Criticism from parents is a risk factor for poor youth mental health, including self-harm and limited response to psychosocial interventions. We identified trajectories of change in parent criticism across treatment for youth self-harm (suicide attempts and non-suicidal self-injury) and compared these trajectories on treatment outcomes. METHODS: This is a preregistered secondary analysis of data from the Self-harm Intervention: Family…
Adaptation and validation of the Washington group/unicef child functioning module in a nationally representative sample of Canadian children and youth
This study extends existing research by demonstrating the utility of the WG/UNICEF CFM in assessing cognitive, behavioral, interpersonal, and emotional functional difficulties at the population level in a high-income country. The measure's strong psychometric properties, ease of use, and cost-free administration support its applicability in general population health surveys of children and youth. Findings highlight the value of a dimensional appr…
Impact of household food insecurity and nutrition on depression and anxiety symptoms among adolescents living in rural Pakistan
Background This study investigates the links between dietary diversity, food insecurity and mental health (depression and anxiety) in adolescents from rural Pakistan. Adolescence is a critical time for developing mental health disorders, yet limited research exists on these issues in low- and middle-income countries (LMICs). Methods The study included 1,396 adolescents (ages 9–15) and assessed their mental health, nutrition and maternal well-bein…
Worldwide Prevalence and Disability From Mental Disorders Across Childhood and Adolescence
Importance The period from childhood to early adulthood involves increased susceptibility to the onset of mental disorders, with implications for policy making that may be better appreciated by disaggregated analyses of narrow age groups. Objective To estimate the global prevalence and years lived with disability (YLDs) associated with mental disorders and substance use disorders (SUDs) across 4 age groups using data from the 2019 Global Burden o…
Gender diversity is correlated with dimensional neurodivergent traits but not categorical neurodevelopmental diagnoses in children
BACKGROUND: Gender clinic and single-item questionnaire-based data report increased co-occurrence of gender diversity and neurodevelopmental conditions. The nuances of these associations are under-studied. We used a transdiagnostic approach, combining categorical and dimensional characterization of neurodiversity, to further the understanding of its associations with gender diversity in identity and expression in children. METHODS: Data from 291 …
Guideline for reporting systematic reviews of outcome measurement instruments (OMIs)
PRISMA-COSMIN for OMIs 2024 consists of two checklists (full reports; abstracts), their corresponding explanation and elaboration documents detailing the rationale and examples for each item, and a data flow diagram. PRISMA-COSMIN for OMIs 2024 can improve the reporting of systematic reviews of OMIs, fostering their reproducibility and allowing end-users to appraise the quality of OMIs and select the most appropriate OMI for a specific applicatio…
Disentangling global and domain‐level adaptive behavior trajectories among children with autism spectrum disorder
BACKGROUND: Heterogeneity in adaptive behavior abilities among people with autism spectrum disorder (ASD) is expressed not only as uneven levels of impairment across domains, but also in the developmental trajectories of adaptive skills. We studied the question of whether, after accounting for global adaptive behavior development, we find evidence of heterogeneity in the trajectories of specific domains of adaptive behavior. METHODS: A sample of …
Continuity of trajectories of autism symptom severity from infancy to childhood
BACKGROUND: Behavioral symptom trajectories are informative of the development of young children at increased likelihood for autism spectrum disorder (ASD). METHODS: Developmental trajectories of early signs were examined in a cohort of siblings of children diagnosed with ASD (n = 502) from 6 to 18 months using the Autism Observation Scale for Infants (AOSI), and from 18 months to 5-7 years using the Autism Diagnostic Observation Schedule (ADOS).…
The Lancet Commission on the future of care and clinical research in autism
Middle‐childhood executive functioning mediates associations between early‐childhood autism symptoms and adolescent mental health, academic and functional outcomes in autistic children
BACKGROUND: Executive functioning (EF) varies in children with autism spectrum disorder (ASD) and is associated with clinical symptoms, academic, and adaptive functioning. Here, we examined whether middle-childhood EF mediates associations between early-childhood autism symptoms and adolescent outcomes in children with ASD. METHODS: The Pathways in ASD Cohort comprising children recruited at the time of ASD diagnosis (at 2-4 years-of-age) and fol…
Characterizing the ASD–ADHD phenotype
BACKGROUND: Autism Spectrum Disorder (ASD) and Attention Deficit Hyperactivity Disorder (ADHD) have considerable overlap, supporting the need for a dimensional framework that examines neurodevelopmental domains which cross traditional diagnostic boundaries. In the following study, we use factor analysis to deconstruct the ASD-ADHD phenotype into its underlying phenotypic domains and test for measurement invariance across adaptive functioning, age…
Predictors of language regression and its association with subsequent communication development in children with autism
BACKGROUND: Language regression, broadly defined as the loss of acquired language skills in early childhood, is a distinctive feature of autism. Little is known about the factors underlying regression or the prognosis of children who exhibit regression. We examine potential predictors of language regression and test its association with language development in a prospective longitudinal sample of children with autism spectrum disorder (ASD) from …
Psychometric properties of the Sindhi version of the Mood and Feelings Questionnaire (MFQ) in a sample of early adolescents living in rural Pakistan
There is a need for reliable and valid screening tools that assess depressive symptoms in adolescents in Pakistan. To address this need, the present study examined the psychometric properties and factor structure of a Sindhi-translated and adapted version of the child-report Mood and Feelings Questionnaire (MFQ-C) and the Short Mood and Feelings Questionnaire (SMFQ-C) in a community sample of adolescents living in Matiari, Pakistan. Questionnaire…
Readability of Commonly Used Quality of Life Outcome Measures for Youth Self-Report
Self-report measures are central in capturing young people's perspectives on mental health concerns and treatment outcomes. For children and adolescents to complete such measures meaningfully and independently, the reading difficulty must match their reading ability. Prior research suggests a frequent mismatch for mental health symptom measures. Similar analyses are lacking for measures of Quality of Life (QoL). We analysed the readability of 13 …
Commentary
Fombonne’s (2020) editorial is a thought‐provoking appraisal of the literature on ‘camouflaging’, whereby some autistic people mask or compensate for their autistic characteristics as an attempt to fit in and to cope with disabilities under neurotypical social norms. Fombonne (2020) highlights three issues of contention: (a) construct validity and measurement of camouflaging; (b) camouflaging as a reason for late autism diagnosis in adolescence/a…
Practitioner Review
Symptom trajectories in the first 18 months and autism risk in a prospective high‐risk cohort
BACKGROUND: Although early autism spectrum disorder (ASD) detection strategies tend to focus on differences at a point in time, behavioral symptom trajectories may also be informative. METHODS: Developmental trajectories of early signs of ASD were examined in younger siblings of children diagnosed with ASD (n = 499) and infants with no family history of ASD (n = 177). Participants were assessed using the Autism Observation Scale for Infants (AOSI…
Assessment of Autism Symptoms From 6 to 18 Months of Age Using the Autism Observation Scale for Infants in a Prospective High-Risk Cohort
The objectives were to characterize behavioral signs of autism spectrum disorder (ASD) in younger siblings of diagnosed children (high-risk; HR) and examine classification features of the Autism Observation Scale for Infants (AOSI). Participants (501 HR and 180 low-risk [LR]) were assessed between 6 and 18 months using the AOSI and at age 3 for ASD diagnoses. Total AOSI scores differentiated HR infants later diagnosed with ASD starting at 12 mont…
‘It reshaped how I will do research’
BACKGROUND: Engaging youth and family members as active partners in research and service design offers great promise in improving projects. In youth mental health, recent research has highlighted the value of youth and family engagement. However, research on the experience and impacts of engagement is sparse. OBJECTIVE: This study explores the project team's experience of youth and family engagement in the design and development of the YouthCan I…
Case Report
Background/Objectives: The child and adolescent psychiatry (CAP) subspecialty training program at the University of Toronto was among the first fully accredited CAP programs in Canada. As one of Canada's largest CAP subspecialty programs, we attract many excellent applicants annually. While objectivity and transparency in the selection of candidates have been valued, it was unclear which applicant attributes should be prioritized. This quality im…
Impacts of Covid-19 on Youth Mental Health, Substance Use, and Well-being
Objectives: The current novel coronavirus disease of 2019 (COVID-19) pandemic presents a time-sensitive opportunity to rapidly enhance our knowledge about the impacts of public health crises on youth mental health, substance use, and well-being. This study examines youth mental health and substance use during the pandemic period. Methods: A cross-sectional survey was conducted with 622 youth participants across existing clinical and community coh…
Covid-19 Impacts on Child and Youth Anxiety and Depression
No abstract available Keywords: anxiety; child and adolescent psychiatry; depressive disorders.
Toward precision therapeutics
BACKGROUND: The longitudinal course of multiple symptom domains in adolescents treated for major depression is not known. Revealing the temporal course of general and specific psychopathology factors, including potential differences between psychotherapies, may aid therapeutic decision-making. METHODS: Participants were adolescents with major depressive disorder (aged 11-17; 75% female; N = 465) who were part of the IMPACT trial, a randomized con…
Textual systems
Familial Influences on Substance Use by Adolescents and Young Adults
Imaging-Genetics in Autism Spectrum Disorder
Autism Spectrum Disorder (ASD) refers to a group of heterogeneous neurodevelopmental disorders that are unified by impairments in reciprocal social communication and a pattern of inflexible behaviors. Recent genetic advances have resolved some of the complexity of the genetic architecture underlying ASD by identifying several genetic variants that contribute to the disorder. Different etiological pathways associated with ASD may converge through …
Linking Oppositional Behaviour Trajectories to the Development of Depressive Symptoms in Childhood
Leiter International Performance Scale-Revised (Leiter-R)
Neurofunctional Underpinnings of Audiovisual Emotion Processing in Teens with Autism Spectrum Disorders
Despite successful performance on some audiovisual emotion tasks, hypoactivity has been observed in frontal and temporal integration cortices in individuals with autism spectrum disorders (ASD). Little is understood about the neurofunctional network underlying this ability in individuals with ASD. Research suggests that there may be processing biases in individuals with ASD, based on their ability to obtain meaningful information from the face an…
Community-Based screening and triage versus standard referral of Aboriginal children
Health solutions for Aboriginal children should be guided by their community and grounded in evidence. This manuscript presents a prospective cohort study protocol, designed by a community-university collaborative research team. The study’s goal is to determine whether community-based screening and triage lead to earlier identification of children’s emotional health needs, and to improved emotional health 1 year later, compared to the standard re…
Prevalence of co-occurring mental health diagnoses in the autism population
A Scoping Review of Evidence-Based Interventions for Adolescents with Depression and Suicide Related Behaviors in Low and Middle Income Countries
Once and Again
Impacts of Covid-19 on Youth Mental Health, Substance Use, and Well-being
Objectives: The current novel coronavirus disease of 2019 (COVID-19) pandemic presents a time-sensitive opportunity to rapidly enhance our knowledge about the impacts of public health crises on youth mental health, substance use, and well-being. This study examines youth mental health and substance use during the pandemic period. Methods: A cross-sectional survey was conducted with 622 youth participants across existing clinical and community coh…
Covid-19 Impacts on Child and Youth Anxiety and Depression
No abstract available Keywords: anxiety; child and adolescent psychiatry; depressive disorders.
Toward precision therapeutics
BACKGROUND: The longitudinal course of multiple symptom domains in adolescents treated for major depression is not known. Revealing the temporal course of general and specific psychopathology factors, including potential differences between psychotherapies, may aid therapeutic decision-making. METHODS: Participants were adolescents with major depressive disorder (aged 11-17; 75% female; N = 465) who were part of the IMPACT trial, a randomized con…
Parenting stress during infancy is a risk factor for mental health problems in 3-year-old children
Healthy preschool-aged children with parents reporting parenting stress during infancy had a 2 times higher odds of mental health problems at 3 years
Suicidal behaviours among adolescents from 90 countries
Building positive social relationships with peers and avoiding serious injury appear key to suicide prevention strategies for vulnerable adolescents. Targeted programs by age group and sex for such indicators could improve mental health during adolescence in low and middle-income countries, given the diverse risk profiles for suicidal ideation and attempts
Commentary
Fombonne’s (2020) editorial is a thought‐provoking appraisal of the literature on ‘camouflaging’, whereby some autistic people mask or compensate for their autistic characteristics as an attempt to fit in and to cope with disabilities under neurotypical social norms. Fombonne (2020) highlights three issues of contention: (a) construct validity and measurement of camouflaging; (b) camouflaging as a reason for late autism diagnosis in adolescence/a…
Practitioner Review
Symptom trajectories in the first 18 months and autism risk in a prospective high‐risk cohort
BACKGROUND: Although early autism spectrum disorder (ASD) detection strategies tend to focus on differences at a point in time, behavioral symptom trajectories may also be informative. METHODS: Developmental trajectories of early signs of ASD were examined in younger siblings of children diagnosed with ASD (n = 499) and infants with no family history of ASD (n = 177). Participants were assessed using the Autism Observation Scale for Infants (AOSI…
Assessment of Autism Symptoms From 6 to 18 Months of Age Using the Autism Observation Scale for Infants in a Prospective High-Risk Cohort
The objectives were to characterize behavioral signs of autism spectrum disorder (ASD) in younger siblings of diagnosed children (high-risk; HR) and examine classification features of the Autism Observation Scale for Infants (AOSI). Participants (501 HR and 180 low-risk [LR]) were assessed between 6 and 18 months using the AOSI and at age 3 for ASD diagnoses. Total AOSI scores differentiated HR infants later diagnosed with ASD starting at 12 mont…
‘It reshaped how I will do research’
BACKGROUND: Engaging youth and family members as active partners in research and service design offers great promise in improving projects. In youth mental health, recent research has highlighted the value of youth and family engagement. However, research on the experience and impacts of engagement is sparse. OBJECTIVE: This study explores the project team's experience of youth and family engagement in the design and development of the YouthCan I…
Case Report
Background/Objectives: The child and adolescent psychiatry (CAP) subspecialty training program at the University of Toronto was among the first fully accredited CAP programs in Canada. As one of Canada's largest CAP subspecialty programs, we attract many excellent applicants annually. While objectivity and transparency in the selection of candidates have been valued, it was unclear which applicant attributes should be prioritized. This quality im…
The Lancet Commission on the future of care and clinical research in autism
Middle‐childhood executive functioning mediates associations between early‐childhood autism symptoms and adolescent mental health, academic and functional outcomes in autistic children
BACKGROUND: Executive functioning (EF) varies in children with autism spectrum disorder (ASD) and is associated with clinical symptoms, academic, and adaptive functioning. Here, we examined whether middle-childhood EF mediates associations between early-childhood autism symptoms and adolescent outcomes in children with ASD. METHODS: The Pathways in ASD Cohort comprising children recruited at the time of ASD diagnosis (at 2-4 years-of-age) and fol…
Characterizing the ASD–ADHD phenotype
BACKGROUND: Autism Spectrum Disorder (ASD) and Attention Deficit Hyperactivity Disorder (ADHD) have considerable overlap, supporting the need for a dimensional framework that examines neurodevelopmental domains which cross traditional diagnostic boundaries. In the following study, we use factor analysis to deconstruct the ASD-ADHD phenotype into its underlying phenotypic domains and test for measurement invariance across adaptive functioning, age…
Predictors of language regression and its association with subsequent communication development in children with autism
BACKGROUND: Language regression, broadly defined as the loss of acquired language skills in early childhood, is a distinctive feature of autism. Little is known about the factors underlying regression or the prognosis of children who exhibit regression. We examine potential predictors of language regression and test its association with language development in a prospective longitudinal sample of children with autism spectrum disorder (ASD) from …
Psychology (27 works) · Medicine (23 works) · Psychiatry (19 works) · Developmental psychology (17 works) · Clinical Psychology (16 works) · Autism (12 works) · Autism Spectrum Disorder Research (12 works) · Child and Adolescent Psychosocial and Emotional Development (11 works) · Mental health (10 works) · Autism spectrum disorder (9 works)