Comparison of face attention bias in adults with ASD, ADHD or comorbid ADHD+ASD.

Faces are crucial sources of information for social interaction and cognition. This importance is reflected in increased attention, referred to as face attention bias (FAB). This preregistered study investigated FAB in adults with autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD), two neurodevelopmental disorders associated with social symptoms. We hypothesised decreased FAB in ASD and altered FAB in ADHD. We assessed exogenous selective attention to faces using a dot-probe paradigm. While a general FAB was observed across groups, autistic adults did not exhibit decreased FAB, contrary to expectations. Critically, adults with ADHD but no ASD showed increased FAB, suggesting heightened exogenous selective attention towards faces. This increase was not reflected in oculomotor behaviour, indicating covert attentional mechanisms. Adults with comorbid ASD and ADHD did not show increased FAB. Saccades were produced faster towards face-cued targets across all groups, but no significant interaction with group emerged regarding oculomotor behaviour. These findings challenge the notion of globally attenuated social attention in ASD, suggesting that not capturing but keeping the attention might differ from non-autistic adults. Moreover, the results highlight the effect of attention dysregulation in ADHD on exogenous selective attention towards faces, potentially contributing to social symptoms.

Interoception refers to the awareness of internal physiological state. Several previous studies reported that people with autism spectrum disorders (ASD) and adults with attention-deficit/hyperactivity disorder (ADHD) have diverse patterns of interoception, but the extent of literature is limited and inconsistent. This study aimed to investigate the interoceptive accuracy (IA) in children with ASD, children with comorbid ASD and ADHD, and typically developing (TD) children with high and low levels of autistic traits. We administered the eye-tracking interoceptive accuracy task (EIAT) to 30 children with ASD, 20 children with comorbid ASD and ADHD, and 63 TD controls with high and low levels of autistic traits. Parent-report scales concerning ASD and ADHD symptoms were collected. ASD children with and without comorbid ADHD both exhibited lower IA than TD children. Reduced IA was also found in TD children with high-autistic traits relative to those with low-autistic traits. IA was negatively correlated with autistic and ADHD symptoms. Atypical cardiac interoception could be found in children with ASD. Difficulties in sensing and comprehending internal bodily signals in childhood may be related to both ASD and ADHD symptoms. LAY SUMMARY: The present study examined interoceptive accuracy (IA) in children with autism spectrum disorders (ASD), children with comorbid ASD and attention-deficit/hyperactivity disorder (ADHD), and typically developing (TD) children with high and low levels of autistic traits. ASD children with and without comorbid ADHD both exhibited lower IA than TD children. TD children with high-autistic traits exhibited decreased IA compared to those with low-autistic traits. These resultshave implications for understanding sensory atypicality found in ASD and ADHD.

Approximately a third of children and adolescents with attention-deficit/hyperactivity disorder (ADHD) experience significant irritability; despite this, no study has reviewed whether interventions for youth with ADHD can improve irritability. This mini review sought to address this gap in the literature by discussing existing pharmacological and psychosocial interventions for irritability among children and adolescents with ADHD. A literature search was conducted in April 2021, with a total of 12 intervention articles identified (six pharmacological, one psychosocial, five combined). Studies were excluded if they did not involve an intervention, a measure of irritability, or the population was not youth with ADHD. Of these articles, two were with an ADHD only sample; seven included ADHD with comorbid disruptive behavior, disruptive mood dysregulation disorder (DMDD), or severe mood dysregulation (SMD); and three included ADHD with comorbid autism spectrum disorder (ASD). Findings suggest that central nervous system stimulants used alone or in combination with behavior therapy are effective at reducing irritability in youth with ADHD only or comorbid ADHD and DMDD/SMD. Less evidence was found for the efficacy of guanfacine and atomoxetine for youth with ADHD only or comorbid ADHD and ASD. Parent training alone or in combination with atomoxetine was found to be effective at reducing irritability in youth with comorbid ADHD and ASD. Future research assessing the efficacy of other psychosocial interventions, particularly cognitive behavioral therapy is necessary, as are randomized trials assessing intervention sequencing and intensity among youth with ADHD. Researchers are advised to utilize well-validated measures of irritability in future research.

Autism symptoms in children with attention-deficit/hyperactivity disorder: a community-based study

Substantial overlap has been reported between attention deficit hyperactivity disorder (ADHD) and autism spectrum disorder (ASD). Deficits in executive function (EF) are characteristic of both disorders but these impairments have not been compared directly across pure and co-morbid cases using event-related potentials (ERPs). Behavioural parameters and ERPs were recorded during a flankered cued-continuous performance test (CPT-OX) administered to 8-13-year-old boys with ASD (n = 19), ADHD (n = 18), co-morbid ASD + ADHD (n = 29) and typically developing controls (TD; n = 26). Preparatory processing (contingent negative variation, CNV) and attentional orienting (Cue-P3) at cues, response execution at targets (Go-P3), inhibitory processing at non-targets (NoGo-P3) and conflict monitoring between target and non-target trials (Go-N2 v. NoGo-N2) were examined. Categorical diagnoses and quantitative trait measures indicated that participants with ADHD (ADHD/ASD + ADHD) made more omission errors and exhibited increased reaction-time (RT) variability and reduced amplitude of the Cue-P3 and NoGo-P3 compared to TD/ASD participants. Participants with ASD (ASD/ ASD + ADHD) demonstrated reduced N2 enhancement from Go to NoGo trials compared to TD/ADHD participants. Participants with ASD-only displayed enhanced CNV amplitude compared to ASD + ADHD and TD participants. Children with ADHD show deficits in attentional orienting and inhibitory control whereas children with ASD show abnormalities in conflict monitoring and response preparation. Children with co-morbid ASD + ADHD present as an additive co-occurrence with deficits of both disorders, although non-additive effects are suggested for response preparation. Measuring ERPs that index attention and inhibition is useful in disentangling cognitive markers of ASD and ADHD and elucidating the basis of co-occurring ASD + ADHD to guide clinical assessment.

Autism and attention deficit hyperactivity disorder (ADHD) comorbidity in the school population have been understudied. This study estimates its prevalence considering both parents' and teachers' reports and clinical diagnosis. Sociodemographic, clinical, and cognitive data were compared by diagnostic groups: autism, ADHD, autism and ADHD, subthreshold autism spectrum disorder (ASD), subthreshold ADHD, and children without neurodevelopmental conditions. Following a two-phase design, 3727 parents and teachers (1802 preschoolers, 1925 school-age children) participated in the first phase. Subsequently, 781 participants underwent individual assessment for DSM-5 diagnoses. The estimated prevalence of the comorbid diagnosis was 0.51% (0.28%-0.74%), with significant sex differences (0.16% girls, 0.89% boys). The cooccurrence of symptoms of autism and ADHD reported by parents or teachers was 3.2% and 2.6%, respectively. ADHD comorbidity was observed in 32.8% of autistic children and 31.4% of those with subthreshold ASD. ASD comorbidity was observed in 9.8% of children with ADHD and 5.7% of those with subthreshold ADHD. Comorbidity was reported by at least one informant in 95% of children. Only 15.8% of children with autism and ADHD had been previously diagnosed with both conditions. Early detection and accurate comorbidity diagnosis are crucial to address the clinical and socio-educational needs of these children.

Background: Autism spectrum disorder (ASD) often co-exists with attention deficit/hyperactivity disorder (ADHD), which may aggravate functional impairment. However, it is unclear how comorbid ADHD symptoms influence the adaptive behavior and social interaction deficits of children with ASD.Methods: The study enrolled 340 children (ranging from 2 to 14 years) with ASD, with comorbid ASD and ADHD, or with typical development (TD). A psychological evaluation involving adaptive behavior and social function was conducted using the Vineland Adaptive Behavior Scale, Second Edition (VABS-II) and the Social Responsiveness Scale (SRS).Results: There was a high prevalence of ADHD symptoms (46.6%) in children with ASD, and children with ASD + ADHD presented the worse profile of ASD symptoms. The ASD + ADHD group had higher scores on VABS and lower scores on SRS in comparison with the ASD alone group and TD group. The regression analysis revealed that ASD symptoms and ADHD symptoms were significantly associated with greater impairments in adaptive behavior and social function. The ADHD symptoms were responsible for an additional 0.8% of the variance in adaptive behavior, and 9.5% of the variance in social function.Conclusions: More severe ASD symptoms and greater impairment in adaptive function and social ability were found in children with ASD and comorbid ADHD, highlighting the need to identify ADHD comorbidities early on in children with ASD and to reduce their negative impact on functioning.

I studied with interest the review article about shared heritability of attention-deficit/hyperactivity disorder (ADHD) and autism spectrum disorder (ASD). The authors mentioned that there is a considerable rate of co-morbidity of ADHD and ASD. It was concluded that there are similar familial/genetic factors for ADHD and ASD origins. It was recommended that in children both ASD and ADHD should be examined instead of only one of both conditions. The authors discussed that the co-occurrence of two disorders may be due to overlapping diagnostic criteria of ADHD and ASD resulting in inflated the rate of co-morbidity. Then they mentioned about their ‘‘vital concern’’ that ‘‘as far as the authors know, no studies exist that have performed a factor analysis on ADHD and ASD DSM-IVderived items to examine the extent of overlapping diagnostic criteria’’ [1]. There is an argument about co-morbidity of ADHD and ASD. Diagnostic and Statistical Manual of Mental Disorders 4th edition (DSM-IV) precludes making ADHD diagnosis in ASD [2]. However, there are many reports about co-morbidity of these two disorders [3, 4]. Herein, the results of a re-analysis of a study about ADHD and autism symptoms in a community sample of 1,600 school aged children are presented. More information about sampling method and the participants was presented before. Valid and reliable parent-completed, DSM-IV-referenced rating scales of ADHD symptoms and ASD symptoms were used [5, 6]. Exploratory factor analysis with varimax rotation was conducted on the 30 items (including 12 items of ASD and 18 items of ADHD). Kaiser–Meyer–Olkin measure of sampling adequacy was 0.92, and Bartlett’s test of sphericity was \0.001. The analysis of the items indicated that 52.5% of the variance was explained by the factor solution. Factor number was determined with eigenvalue more than 1. The loading of items on the six factors are shown in Table 1. A confirmatory factor analysis with two fixed number factors was also conducted. According to the results in both of the analyses, there were no overlapping diagnostic criteria of ADHD and ASD. Therefore, these results support the idea that ‘‘the high rate of co-morbidity of ADHD and ASD is most likely not due to the overlapping diagnostic criteria of ADHD and ASD’’ [1].

Autism spectrum disorder (ASD) and attention deficit / hyperactivity disorder (ADHD) are frequently comorbid and, as both are defined as neurodevelopmental disorders in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, simultaneous diagnosis is possible. However, despite the frequency of this comorbid state, its endophenotypic features remain unclear. This study thus aimed to describe the behavioral and emotional problems in boys with comorbid ASD and ADHD using the Strengths and Difficulties Questionnaire (SDQ). In total, 102 boys (age, 6-12years) diagnosed with one or both disorders were divided into three groups according to their clinical diagnosis: ASD+ADHD (N=39), ASD (N=37), and ADHD (N=25). Symptoms and related behaviors were compared among the groups using parents' ratings of the autism spectrum quotient, ADHD rating scale-IV, and SDQ. In the ASD+ADHD group, the proportion of "clinical-range" cases was as high as 76.9% for the SDQ total difficulties score (TDS). The ASD+ADHD and ADHD groups had significantly higher TDS as well as behavioral problems and hyperactivity subscale scores than did the ASD group; however, the ASD+ADHD group did not have significantly different scores on any subscale compared with the other two groups. The ASD+ADHD and ASD groups also had significantly lower prosocial behavior scores than the ADHD group. When using the SDQ as a screening tool for neurodevelopmental disorders, a high TDS, conduct problems, hyperactivity, and low prosocial behavior can be considered characteristic of ASD and ADHD comorbidity in 6- to 12-year-old boys.

Autism is a highly heritable and clinically heterogeneous neuropsychiatric disorder that frequently co-occurs with other psychopathologies, such as attention-deficit/hyperactivity disorder (ADHD). An approach to parse heterogeneity is by forming more homogeneous subgroups of autism spectrum disorder (ASD) patients based on their underlying, heritable cognitive vulnerabilities (endophenotypes). Emotion recognition is a likely endophenotypic candidate for ASD and possibly for ADHD. Therefore, this study aimed to examine whether emotion recognition is a viable endophenotypic candidate for ASD and to assess the impact of comorbid ADHD in this context. A total of 90 children with ASD (43 with and 47 without ADHD), 79 ASD unaffected siblings, and 139 controls aged 6-13years, were included to test recognition of facial emotion and affective prosody. Our results revealed that the recognition of both facial emotion and affective prosody was impaired in children with ASD and aggravated by the presence of ADHD. The latter could only be partly explained by typical ADHD cognitive deficits, such as inhibitory and attentional problems. The performance of unaffected siblings could overall be considered at an intermediate level, performing somewhat worse than the controls and better than the ASD probands. Our findings suggest that emotion recognition might be a viable endophenotype in ASD and a fruitful target in future family studies of the genetic contribution to ASD and comorbid ADHD. Furthermore, our results suggest that children with comorbid ASD and ADHD are at highest risk for emotion recognition problems.

Children with attention deficit hyperactivity disorder(ADHD) or autism spectrum disorder (ASD) individuallyand those with co-occurring ADHD and ASDexperience higher rates of total anxiety and psychiatric comorbidities such as gender dysphoria and locomotor skillscompared to their typically developing (TD) peers. In this study, it was hypothesized that youth with comorbid ADHD and ASD would experience higher levels of overall anxiety, specifically separation, generalized, and social anxiety. A literature review of relevant studies published from2007 to 2020 was performed, with a search involvingkey terms such as "Anxiety," "ADHD" and "ASD'". It was discovered that individuals with ADHD or ASD had higher levels of anxiety compared to their peers. Furthermore, children who have co-occurring ADHD and ASD had more serve levels of anxiety than children with an individual diagnosis of ADHD or ASD. Children with ASD, ADHD, and co-occurring ADHD and ASD had a higher prevalence of gender dysphoria and impaired locomotor skills, which lead to higher levels of psychiatric comorbidities seen in this population. It can be hypothesized psychiatric comorbidities could also have implications for the high anxiety levels seen in this population but further research is needed to confirm this.

Injuries are a major cause of morbidity and mortality among children with neurodevelopmental conditions. Identifying injuries associated with this vulnerable population could inform specific preventive actions. To compare the injury risk among children with autism spectrum disorder (ASD), attention-deficit/hyperactivity disorder (ADHD), or coexisting ASD and ADHD with children with typical development (TD). This population-based cohort study involved 325 412 children born between 2005 and 2009, followed up until the end of 2021. Data analysis was conducted from February 2 to November 14, 2023. The study data were extracted from the Clalit Health Service (CHS) database, which contains comprehensive clinical and sociodemographic data on all members of the CHS admitted to the emergency departments (EDs) of all hospitals in Israel during the study period. Children who were members of CHS born between 2005 and 2009 were classified into 4 groups: ASD, ADHD, ASD and ADHD, and TD (control). Negative binomial regression models were used to assess incidence rate ratios (IRRs) of ED visits between the study groups and the control group. These models were adjusted for birth year, sector, and socioeconomic status. IRRs for specific injuries were also assessed. The statistical significance of IRRs was assessed using 95% CIs. A total of 325 412 children (163 183 boys [50%]) were included in the study. Children with ASD, ADHD, or both had significantly higher ED visit rates than children with TD (IRR, 1.48 [95% CI, 1.42-1.55], 1.45 [95% CI, 1.39-1.52], and 1.29 [95% CI, 1.28-1.30], respectively). Children with ADHD had also higher rates of ED visits due to physical injuries compared with controls (IRR, 1.18 [95% CI, 1.16-1.20]), whereas children with ASD with or without ADHD did not (IRR, 0.96 [95% CI, 0.89-1.05] and 0.91 [95% CI, 0.83-1.00], respectively). A focused analysis of the injury profiles revealed that children with ASD or comorbid ASD and ADHD had higher rates of ingestion and inhalation injuries (IRR, 1.57 [95% CI, 1.06-2.25] and 1.80 [95% CI, 1.28-2.48], respectively) and lower rates of orthopedic injuries (IRR, 0.78 [95% CI, 0.69-0.89] and 0.83 [95% CI, 0.74-0.93], respectively), and animal-inflicted injuries (IRR, 0.44 [95% CI, 0.22-0.79] and 0.92 [95% CI, 0.60-1.35], respectively) than controls. In this large cohort study, different types of injury were associated with children with ASD and ADHD. The causes underlying these associations should be further investigated to develop effective approaches for injury reduction among these children.

Background: Autism spectrum disorder (ASD) often co-exists with attention deficit/hyperactivity disorder (ADHD), which may aggravate functional impairment. However, it is unclear how comorbid ADHD symptoms influence the adaptive behavior and social interaction deficits of children with ASD. Methods: The study enrolled 340 children (ranging from 2 to 14 years) with ASD, with comorbid ASD and ADHD, or with typical development (TD). A psychological evaluation involving adaptive behavior and social function was conducted using the Vineland Adaptive Behavior Scale, Second Edition (VABS-II) and the Social Responsiveness Scale (SRS). Results: There was a high prevalence of ADHD symptoms (46.6%) in children with ASD, and children with ASD+ADHD presented the worse profile of ASD symptoms. The ASD+ADHD group had higher scores on VABS and lower scores on SRS in comparison with the ASD alone group and TD group. The regression analysis revealed that ASD symptoms and ADHD symptoms were significantly associated with greater impairments in adaptive behavior and social function. The ADHD symptoms were responsible for an additional 0.8% of the variance in adaptive behavior, and 9.5% of the variance in social function. Conclusions: More severe ASD symptoms and greater impairment in adaptive function and social ability were found in children with ASD and comorbid ADHD, highlighting the need to identify ADHD comorbidities early on in children with ASD and to reduce their negative impact on functioning.

Children with Down syndrome (DS) are more likely to be diagnosed with co-existing conditions, such as autism spectrum disorder (ASD) and attention deficit/hyperactivity disorder (ADHD). However, the correlation has not been fully delineated to date. Our study aimed to examine the associations of DS with ASD and ADHD in children and adolescents using a national population-based database. In this cross-sectional study, we included a total of 214,300 children aged 3-17 years from the National Health Interview Survey. Physician-diagnosed DS, ASD and ADHD were reported during an in-person household interview. Logistic regression with survey sampling weights was used to estimate the odds ratios (ORs) of ASD and ADHD, along with 95% confidence intervals (CIs). Among the 214,300 children, 329 were identified as having DS. Among those, 21 children were diagnosed with ASD, 48 with ADHD, and 6 exhibited co-existing ASD and ADHD. After adjusting for demographic factors, compared to those without DS, the ORs of ASD, ADHD and the co-occurrence of ASD and ADHD in children with DS were 5.40 (95% CI: 3.04-9.59), 1.72 (95% CI: 1.17-2.53), and 3.45(95% CI:1.29-9.20), respectively. Stratified analysis revealed that significant associations of DS with ASD and ADHD were detected for both male and female, but an interaction effect was only observed between sex and ASD (P < 0.001). Our study confirmed that children with DS are more likely to have comorbidities of ASD and ADHD than the general population, and these comorbidities may vary by sex.

Autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) are two highly prevalent and commonly co-occurring neurodevelopmental disorders. The neural mechanisms underpinning the comorbidity of ASD and ADHD (ASD + ADHD) remain unclear. We focused on the topological organization and functional connectivity of brain networks in ASD + ADHD patients versus ASD patients without ADHD (ASD-only). Resting-state functional magnetic resonance imaging (rs-fMRI) data from 114 ASD and 161 typically developing (TD) individuals were obtained from the Autism Brain Imaging Data Exchange II. The ASD patients comprised 40 ASD + ADHD and 74 ASD-only individuals. We constructed functional brain networks for each group and performed graph-theory and network-based statistic (NBS) analyses. Group differences between ASD + ADHD and ASD-only were analyzed at three levels: nodal, global, and connectivity. At the nodal level, ASD + ADHD exhibited topological disorganization in the temporal and occipital regions, compared with ASD-only. At the global level, ASD + ADHD and ASD-only displayed no significant differences. At the connectivity level, the NBS analysis revealed that ASD + ADHD showed enhanced functional connectivity between the prefrontal and frontoparietal regions, as well as between the orbitofrontal and occipital regions, compared with ASD-only. The hippocampus was the shared region in aberrant functional connectivity patterns in ASD + ADHD and ASD-only compared with TD. These findings suggests that ASD + ADHD displays altered topology and functional connectivity in the brain regions that undertake social cognition, language processing, and sensory processing.