Leyton Obsessional Inventory-Child Version Research Articles

Premonitory Awareness Facilitates Tic Suppression: Subscales of the Premonitory Urge for Tics Scale and a New Self-Report Questionnaire for Tic-Associated Sensations.

Awareness of premonitory urge in Tourette syndrome (TS) may facilitate tic suppression; however, previous studies have not supported this observation. We aimed to clarify the relationship between tic-associated sensation and tic suppression by identifying the subtypes of tic-associated sensations, including the Premonitory Urge for Tics Scale (PUTS). We developed a new questionnaire called “Rumination and Awareness Scale for tic-associated sensations” (RASTS) to assess the two additional aspects of tic-associated sensations: the intensity of somatosensory hyperawareness and the ability to identify signals of emerging tics. Sixty-two individuals with TS participated in the study (mean age = 19.2 ± 10.3 years). All participants completed the RASTS, PUTS, and Tic Suppression Scale. Of all participants, 41 were evaluated by the Yale Global Tic Severity Scale (YGTSS), while another group of 41 completed both the Leyton Obsessional Inventory-Child Version (LOI-CV) and the Tics Symptom Self-Report (TSSR). Factor analyses including nine items of the PUTS and the RASTS were conducted, and their relationships with patients’ tic suppression ability were examined. The results support using RASTS for the two supposed dimensions (rumination about sensation and premonitory awareness) for assessing the two different tic-associated sensations, and PUTS for three dimensions for assessing the two types of quality of premonitory urges and intensity of premonitory urges. Premonitory awareness correlated with tic suppression ability. Conversely, rumination about sensation, PUTS total score, and the three subscales of PUTS correlated with obsessive-compulsive symptoms. In summary, being aware of signals for emerging tics facilitated self-initiated tic suppression, while ruminative tic-associated sensations did not. This study provides new insights into behavioral therapy for tics by identifying two distinct aspects of tic-associated sensations that include premonitory urges.

2.63 A Factor Analysis of the Leyton Obsessional Inventory–Child Version (LOI-CV) in a Population Greek National School-Based Survey

OCD traits measured in pediatric population sample groups can better define the phenotype of obsessive-compulsive disorder and obsessive-compulsive personality disorder (OCPD). The current study aims to delineate the adolescent population phenotypic profile of OC traits, using model-fitting procedures that include a bifactor model.

Psychometric properties of the Short Leyton Obsessional Inventory-Child Version in a community sample of Spanish children and adolescents

The aim of the current study was to analyze psychometric properties of the Short LOI-CV in Spanish community sample. Participants were 914 children and adolescents with mean age of 13.01 years (51.3% males). An EFA yielded a three-factor model representing Obsessions, Compulsions, and Cleanliness dimensions. Both, total score and subscales showed an adequate internal consistency. The Spanish version also exhibited good test-retest reliability and moderate convergent and discriminant validity. The younger participants (from 8 to 10 years) obtained higher means for total score and subscales than older participants (groups 11-13 and 14-18 years). Significant differences related to gender were also observed since males obtained higher means in Compulsions subscale. Despite more research is required, the Spanish version of the Short LOI-CV exhibited promising psychometric results to assess obsessive-compulsive symptoms in community population.

Psychometric properties of the Short Leyton Obsessional Inventory-Child Version in a community sample of Spanish children and adolescents

El objetivo de este estudio fueanalizar las propiedades psicométricas del ShortLOI-CVen unamuestra españolacomunitaria.Los participantes fueron 914 niñosyadolescentescon edad mediade13.01años (varones =51.3%).ElAFE mostróun modelo de tresfactores compuesto por los dominios Obsesiones, CompulsionesyLimpieza. Tanto lapuntuación total comolas subescalas mostraron una adecuadaconsistenciainterna.Laversión española mostróbuena fiabilidad test-retestymoderada validezconvergenteydiscriminante.Los participantes más jóvenes (8a10 años) obtuvieron medias más altasquela escala Totalydistintas subescalas quelos mayores (grupo de11-13yde 14-18años). Se encontraron también diferencias significativas respecto al sexo, siendo losvarones los que mayoresmedias mostraron en laescala de compulsiones.Pese aqueesnecesariamás investigación, estos resultados sugirieron que la versión en español del ShortLOI-CV mostróun buen rendimiento psicométricos para evaluar los síntomas obsesivo-compulsivosen niñosyadolescentesen población comunitaria The aim of the current study was to analyze psychometric properties of the Short LOI-CV in Spanish community sample. Participants were 914 children and adolescents with mean age of 13.01 years (51.3% males). An EFA yielded a three-factor model representing Obsessions, Compulsions, and Cleanliness dimensions. Both, total score and subscales showed an adequate internal consistency. The Spanish version also exhibited good test-retest reliability and moderate convergent and discriminant validity. The younger participants (from 8 to 10 years) obtained higher means for total score and subscales than older participants (groups 11-13 and 14-18 years). Significant differences related to gender were also observed since males obtained higher means in Compulsions subscale. Despite more research is required, the Spanish version of the Short LOI-CV exhibited promising psychometric results to assess obsessive-compulsive symptoms in community population.

Psychometric Properties of Turkish versions of the Leyton Obsessional Inventory-Child Version (LOI-CV) and Obsessive Beliefs Questionnaire-Child Version (OBQ-CV)

ABSTRACTObjective: Juvenile obsessive-compulsive disorder has been increasingly recognized in the literature. However, the developmentally sensitive screening tools for obsessive-compulsive disorder (OCD) in children and adolescents still lag behind psychometric tools developed for adult OCD. The Leyton Obsessional Inventory-Child Version is the most widely utilized screening tool for juvenile OCD assessment. Our aim was to assess psychometric properties of the Leyton Obsessional Inventory-Child Version (LOI-CV) and Obsessive Beliefs Questionnaire-Child Version (OBQ-CV).Method: The sample consisted of 805 children and adolescents, aged from 11 to 17 years. Mean age of the sample was 13.85 (SD±1.40) years. The LOI-CV, OBQ-CV, Obsessive Compulsive Inventory-Revised (OCI-R), State Trait Anxiety Inventory for Children (STAI-C) and Meta-Cognitions Questionnaire for Children (MCQ-C) were completed by respondents. The data were subjected to explanatory and confirmatory factor analyses. Internal consistency and t...

The analysis survey of 4335 children and adolescents with leyton obsessional inventory-child version

Objective To survey obsessive-compulsive symptom of children and adolescents. Methods 4335 children and adolescents aged (13.88±2.44) year-old (47.7% male) were measured with leyton obsessional inventory-child version(LOI-CV). Results The frequency of total yes/no score of LOI-CV manifests as normal distribution, while the frequency of total interfering score manifests as J curve. Total yes/no scores of female were higher than that of male ((8.55±3.87), (8.21±3.99), t=2.86, P 0.05). Primary school (n=937), junior high school (n=1906), senior high school(n=1492) exited significant difference((7.86±3.82), (8.52±3.93), (8.55±3.891) respectively, F=11.03, P<0.01). The total interfering scores of male were higher than that of female((11.35±9.10), (10.76±8.84), t=2.18, P=0.03). The total interfering scores of country were higher than that of city((11.86±9.18), (10.88±8.92), t=2.61, P<0.01); the difference of primary school, junior high school and senior high school were significant((10.05±8.76), (11.73±9.17), (10.77±8.76), F=12.088, P<0.01) .The total interfering score from grade four of primary school to grade three of senior high school were(10.0±8.78), (10.01±8.64), (10.19±8.92), (11.43±9.16), (11.40±8.67), (12.58±9.76), (10.32±8.42), (10.19±8.38), (12.48±9.69) respectively(F=5.90, P<0.01). The two grades of the highest total interfering score were grade three of junior high school and grade three of senior high school. Conclusion Obsessive-compulsive symptom are common in children and adolescents.Children and adolescents of male grade three of junior high school or senior high school in the country are more probably interfered by obsessive-compulsive symptom. Key words: Children and Adolescents; Obsessive-compulsive Symptom; Leyton Obsessional Inventory-Child Version

Obsessive-compulsive symptoms and physical activity in patients with anorexia nervosa - possible relationships.

The aim of the study was to find relationship between obsessive-compulsive symptoms and level and characteristic of physical activity among patients with anorexia nervosa (AN). Material and methods. 76 female patients, aged 14.8 +/ - 1.8 years with AN completed the Polish version of the Leyton Obsessional Inventory-Child Version (LOI-CV). In order to assess the level and type of physical activity, Physical Activity Questionnaire was developed. 35 (46%) subjects were qualified to HR group (Obsessive-Compulsive Disorder "High-risk group") (25 or more points on the Interference Score of LOI-CV) and 41 (54%) to nHR group (no "High-risk group"). nHR patients spent less studying in a standing position, significantly more often used elevators rather than stairs and, according to their parents, devote less time for physical activity. Positive correlation between the caregiver's perception of patient's weekly activity and the number of "YES" answers in LOI-CV, positive trend between Patient's Activity Index or summarised Activity Index and the number of "YES" answers in LOI-CV were found. We also found negative correlation between the time spent studying at school and the number of "YES" answers in LOI-CV. The results show that there is a connection between obsessive-compulsive symptoms and the hyperactivity in AN patients.

Psychopathological factors that can influence academic achievement in early adolescence: a three-year prospective study.

This three-phase prospective study investigated psychosocial factors predicting or associated with academic achievement. An initial sample of 1,514 school-age children was assessed with screening tools for emotional problems (Screen for Childhood Anxiety and Related Emotional Disorders; Leyton Obsessional Inventory-Child Version; Children's Depression Inventory). The following year, 562 subjects (risk group/without risk group) were re-assessed and attention deficit/hyperactivity disorder (ADHD) was assessed. Two years later, 242 subjects were followed, and their parents informed about their academic achievement. Results showed that early depression (phase 1 B = -.130, p = .001; phase 1 + phase 2 B = -.187, p < .001), persistent anxiety symptoms (phase 1 + phase 2 B = -1.721, p = .018), and ADHD were predictors of lower academic achievement (phase 1 + phase 2 B = -3.415, p = .005). However, some anxiety symptoms can improve academic achievement (Social phobia B = .216, p = .018; Generalized anxiety B = .313, p < .001). Socio-economic status (SES) was positively related to academic achievement. We can conclude that in the transition period to adolescence, school-health professionals and teachers need to consider the emotional issues of students to avoid unwanted academic outcomes.

A Prospective Study of Paediatric Obsessive–Compulsive Symptomatology in a Spanish Community Sample

The obsessive-compulsive manifestations course was assessed with the Leyton obsessional inventory-child version survey (LOI-CV) in a 3-year prospective study, using a non-clinical sample. From an initial sample of 1,514 school-age children who underwent symptoms screening for obsessive-compulsive, anxiety and depression, 562 subjects (risk group/without risk group) were re-assessed in the 2nd phase and 242 subjects were monitored after 3 years. LOI-CV scores significantly decreased over time independently of age and gender. The prevalence, persistence and incidence for two levels of severity of obsessive–compulsive manifestations ranged between 4.8-30.4%, 9.3-28.4% and 1.1-14.4%, respectively. 34.6-64.5% of obsessive-compulsive symptomatology was predicted by anxiety, depressive and obsessive-compulsive symptoms. For the obsessiveness (less severe form of obsessive-compulsive manifestations), the depressive symptoms were not predictors. Gender and socioeconomic status were not related with obsessive-compulsive manifestations. These data support a substantial continuity of the obsessive-compulsive manifestations and the existence of different levels of severity within the obsessive-compulsive spectrum.

Obsessive-Compulsive Symptoms among Spanish Adolescents: Prevalence and Association with Depressive and Anxious Symptoms

AbstractThe present study examines the prevalence of obsessive-compulsive symptoms (OCS) in a population 1,061 adolescents (mean age 13.92) in Spain. The association between OCS and anxiety symptoms severity (panic attacks, separation anxiety, social phobia, generalized anxiety and school phobia) and depressive symptom severity has also been studied. Two distinct groups of subjects were defined and analyzed as being ‘positive’ on the obsessive-compulsive screen: The first group (called High interference) included all of the subjects who scored 25 or more in Leyton Obsessional Inventory-Child Version (LOI-CV) interference score regardless of symptom presence score, and the second group (labeled High symptom presence) consisted of all subjects with a symptom presence score equal to or above 15 and an interference score of 10 or less. Females scored higher than did males both on the symptom presence and interference scores. Forty- one subjects (3.9%) showed an interference score of 25 or more (high interference group) while eight students (0.8%) were included in the high symptom presence group. The most prevalent and interfering symptoms were: fussy about hands, hating dirt and contamination and going over things a lot. In addition, the association between LOI and depressive symptom severity was significant, while the association between LOI and anxiety symptoms severity was insignificant.

The Leyton Obsessional Inventory-Child Version Survey Form does not demonstrate adequate psychometric properties in American youth with pediatric obsessive-compulsive disorder

The psychometric properties of the Leyton Obsessional Inventory-Child Version Survey Form (LOI-CV Survey Form) and the Short Leyton Obsessional Inventory-Child Version Survey Form (Short LOI-CV Survey Form) were examined in a clinical sample of 50 children and adolescents with obsessive-compulsive disorder (OCD). The internal consistency of the LOI-CV and Short LOI-CV Survey Forms were acceptable and poor, respectively ( α = .79 and .65). The LOI-CV Survey Form was significantly and moderately correlated with child-rated OCD-related impairment, but was not significantly correlated with any other measures of OCD symptom frequency or severity, OCD-related impairment, global symptom severity, child reports of anxiety and depressive symptoms, and parent reports of children's obsessive-compulsive, internalizing, and externalizing symptoms. Modest support for the cognitive-behavioral treatment sensitivity of the LOI-CV Survey Form (Cohen's d = 0.98) but not the Short LOI-CV Survey Form (Cohen's d = 0.09) was demonstrated. Diagnostic sensitivity was poor for the LOI-CV Survey Form at both pre- (0.14) and post-treatment (0.06). Overall, these results suggest that the psychometric properties of the LOI-CV and Short LOI-CV Survey Forms are not adequate for use as a screening instrument or in assessing symptom severity in pediatric OCD.

Preliminary evidence suggesting caution in the use of psychiatric self-report measures with adolescents with high-functioning autism spectrum disorders

This study investigated the utility of self-report measures to screen for psychiatric comorbidities in autism spectrum disorders (ASDs). Thirty-eight 10–17 year olds with an ASD and without mental retardation completed: the Children's Depression Inventory-Short version ( CDI-S), Revised Children's Manifest Anxiety Scale ( RCMAS), Conners-Wells Adolescent Self-report Scale-Short edition ( CASS-S), and Short Leyton Obsessional Inventory-Child Version ( SLOI-CV). Their parents were interviewed with the Autism Comorbidity Interview-Present and Lifetime ( ACI-PL) to establish psychiatric diagnoses. Sensitivity, specificity, positive and negative predictive values, and reliability coefficients were calculated for each self-report and compared to values from literature. The CDI-S and CASS-S yielded a high number of false negatives, with lower sensitivities and specificities in the sample than the literature. There was a nearly significant difference in total mean RCMAS scores between participants with and without anxiety, though again the means for both groups were below the threshold of concern. The SLOI-CV yielded a high false positive rate. All four instruments had reliability coefficients comparable to literature values. Results must be considered preliminary due to sample size. However, the findings suggest that although self-report instruments may provide useful information in the diagnosis of psychiatric comorbidities in ASD, caution must be exercised in their interpretation.

Temperament features in adolescents with ego-syntonic or ego-dystonic obsessive-compulsive symptoms

The present study evaluated whether different patterns of temperament may predict a different threshold of acceptability of obsessive-compulsive (OC) symptoms in adolescents. OC symptomatology was detected with the Leyton Obsessional Inventory-Child Version (LOI-CV) and temperament was assessed using the tridimensional personality questionnaire in 2,775 high-school students. According to the LOI-CV scores, the adolescents were classified as high interference (interfering, ego-dystonic symptoms) (HI), supernormal (noninterfering, ego-syntonic symptoms) (Sn) and controls (C) HI were 119 (4.3%), Sn 85 (3.1%) and C 2,571 (92.6%). The best predictor of belonging to HI or Sn groups was the temperament configuration of high Harm Avoidance (HA) and high Persistence (P). The feature that mainly distinguishes the two symptomatic groups were Novelty Seeking (NS) levels. Our data suggest that people characterized by pessimistic worry in anticipation of future problems, passive avoidant behaviour, rapid fatigability (high HA) and irresoluteness, ambitiousness, perseverance, perfectionism, enduring feelings of frustration (high P) might develop OC symptoms. Whether OC symptoms become ego-syntonic or ego-dystonic seems to mainly depend on NS levels: low NS might protect people (with the prevention of "exploratory and active behaviours" that may elicit loss of control on symptoms) from the development of interfering OC symptoms.

Psychopathological and nutritional correlates of plasma homovanillic acid in adolescents with anorexia nervosa

Dopaminergic abnormalities have been described in anorexia nervosa but studies about plasma level of homovanillic acid (pHVA) have yielded conflicting results probably due to the small number and the heterogeneity of patients. Plasma HVA, nutritional and hormonal parameters and several scales – the Eating Attitudes Test (EAT), the Beck Depression Inventory (BDI), the Leyton Obsessional Inventory-child version (LOI-C) and the State and Trait Anxiety Inventory (STAI) – were assessed in 44 adolescent anorexia nervosa patients (mean age 14.7 years, SD 1.7) consecutively admitted to an Eating Disorder Unit. They were evaluated at admission, at discharge and, in 34 cases, after 9 months of follow-up. pHVA was also assessed in 16 control adolescents. Patients had significantly higher pHVA than controls ( p = .002). About 31% of patients had a very high level of pHVA, a significantly higher ( p = .006) mean score in the BDI and a non significantly higher mean score in the EAT. After weight recovery some laboratory parameters improved as well as the EAT ( p = .019), the BDI ( p = 001) and the Interference score of the LOI-C ( p = .004). Moreover, pHVA decreased significantly ( p = .036). At follow-up, patients with normal weight had lower ( p = .037) pHVA than patients with low weight. The conclusion would be that there is a dopaminergic dysfunction in anorexic patients, specially in a subgroup with high depressive and anorexic symptomatology. With weight recovery and psychopathological improvement, pHVA tends to normalization.

Performance of Clinician Versus Self-Report Measures to Identify Obsessive-Compulsive Disorder in Children and Adolescents

The aim of this study was to study agreement between clinician-rated measures and self-report measures previously used in epidemiologic studies to identify obsessive-compulsive disorder (OCD) in youth and to determine the adequacy of self-report measures as screening instruments. Leyton Obsessional Inventory-Child Version (LOI-CV) survey form self-report and Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS) clinician-report measures were compared in a sample of 81 OCD-affected youths diagnosed using structured diagnostic interviews and the best-estimate method. Sensitivities and agreement between tests are determined for different cutoff scores. The LOI-CV survey form total (item+interference) score is correlated with KSADS-E OCD severity (r=0.37, p=0.001) but not clinician-rated GAF scores (r=-0.18, p=0.12). LOI-CV survey form sensitivities at cutoff scores of 15, 20, 25, and 30 are 55%, 36%, 28%, and 19%, respectively. CY-BOCS scores are correlated with subject-rated interview severity (p<0.001) and clinician-rated GAF scores (p<or=0.05). CY-BOCS sensitivities at cutoff scores of 8, 10, 12, and 14 are 100%, 99%, 98%, and 90%. The cutoff scores required for greater than 95% sensitivity of the LOI-CV survey form and the CY-BOCS, respectively, are 2 and 12. LOI-CV survey form total scores do not correlate with CY-BOCS total or obsession subscores (p>or=0.03), but correlate with the CY-BOCS compulsion subscore. The clinician-rated CY-BOCS measure using parent and child reporting performs superiorly to the subject-rated LOI-CV measure using child reporting to identify pediatric OCD in a clinically referred population. Because self-report measures have been used in epidemiological studies, youth OCD prevalence rates may be higher than previously reported.

Epidemiology and phenomenology of obsessive-compulsive disorder in non-referred young adolescents

The aim of this study was to investigate the frequency and phenomenology of obsessive-compulsive disorder (OCD) and subclinical OCD in a non-referred population of young Polish adolescents. A two stage ascertainment procedure (school screening and diagnostic evaluation) was used to identify affected individuals. In the first stage, 3,100 pupils were asked to complete the Polish version of the 20-item Leyton Obsessional Inventory-Child Version (LOI-CV). In the diagnostic stage, the presence of obsessions and compulsions was assessed with the author's structured interview questionnaire based on DSM-IV and ICD-10 diagnostic criteria for OCD; the Polish version of the Children's Yale-Brown Obsessive-Compulsive Scale (CY-BOCS) was used to rate the symptom severity. A frequency of 0.38 % was found for OCD and 2.7 % for subclinical OCD. There was no significant difference in the phenomenology, demographic characteristic or socio-familial variables comparing the diagnosed OCD and subclinical OCD subjects. The identified OCD cases had characteristics similar to those of previously described clinical and non-referred samples.

Cognitive Predictors of Obsessive–Compulsive Symptoms in Adolescence: A Preliminary Investigation

This study examined relations among responsibility attitudes, metacognitive beliefs, and obsessive–compulsive (O–C) symptoms in youth. One hundred sixty-six nonclinical youth (ages 13 to 17 years) completed the following: Responsibility Attitude Scale (RAS; Salkovskis et al., 2000); Meta-Cognitions Questionnaire–Adolescent Version (MCQ–A; Cartwright-Hatton et al., 2004); Children's Depression Inventory–Short Form (CDI–S; Kovacs, 1985); Revised Children's Manifest Anxiety Scale (RCMAS; Reynolds & Richmond, 1978); the Leyton Obsessional Inventory–Child Version Survey Form (LOI–CVS; Berg, Whitaker, Davies, Flament, & Rapoport, 1988). Participants endorsed a range of responsibility and metacognitive beliefs, and both responsibility and metacognition were positively correlated with O–C symptoms. However, when age, sex, and depression were controlled, only metacognition was a predictor of O–C symptoms. The findings suggest metacognition and responsibility may be important correlates of O–C symptoms in youth.

Development of a Short Leyton Obsessional Inventory for Children and Adolescents

To develop a short, cost-effective screening measure for adolescent obsessive-compulsive disorder (OCD). The 20-item Leyton Obsessional Inventory-Child Version and the Mood and Feelings Questionnaire were completed by five groups of adolescents: those with a predominant diagnosis of OCD (n = 9), major depressive disorder with comorbid OCD ( n = 14), major depressive disorder without comorbid OCD ( n = 65), a community sample including subjects at high risk for psychopathology ( n = 253), and well controls ( n= 50). Leyton Obsessional Inventory scores for the community sample ( n= 253) were factor analyzed, whereas the remaining groups' scores served as validation. Factor analysis yielded a robust 11-item solution with three distinct components accounting for 47.6% of total variance. Internal reliability was high for the short scale total (Cronbach alpha =.86) and three subscales: Compulsions (alpha =.73), Obsessions/Incompleteness (alpha =.79), and Cleanliness (alpha =.75). Logistic regression found the Compulsions subscale discriminated OCD cases from community controls and discriminated major depressive disorder with and without comorbid OCD. The Obsessions subscale discriminated OCD cases from community, well control, and depressed nonobsessional groups. The Short Leyton Obsessional Inventory-Child Version is a psychometrically sound, quick, economical screen that discriminates OCD cases from noncases irrespective of comorbid major depressive disorder.

The Parma High School Epidemiological Survey: obsessive-compulsive symptoms.

This study was undertaken to assess the prevalence of obsessive-compulsive symptoms in a population of Italian adolescents. A sample of 2877 high-school students, 1463 males (51%) and 1414 females (49%), aged 16-21 years were assessed with the Leyton Obsessional Inventory--Child Version (LOI-CV). Two groups of subjects were defined as 'positive' on the screen: the high interference (HI) (i.e. all subjects who scored 25 or more in the interference score), and the supernormals (Sn). Females scored higher than males both on yes and interference scores. One hundred and nineteen (4.1%) and 87 (3.0%) constitute, respectively, the HI and the Sn groups. The most interfering symptoms were obsessions linked to dirt phobia, rumination and nail biting. The prevalence estimates of OCD symptoms confirmed the recent data of the literature that adolescent OCD symptoms are more frequent than was believed previously. Females showed more symptoms and more interference on personal functioning than males.

Quantitative and qualitative aspects of obsessive-compulsive behaviour in children with attention-deficit hyperactivity disorder compared with tic disorder.

Within the framework of associated psychopathology in child psychiatric disorders, this study focused on quantitative and qualitative aspects of obsessive-compulsive behaviour (OCB) in both attention-deficit hyperactivity disorder (ADHD) and chronic tic disorder/Tourette's disorder (TD). Forty-two healthy controls, 41 children with ADHD and 38 children with TD, aged 9-13 years, were investigated using the Leyton Obsessional Inventory--Child Version (LOI-CV), the Child Behaviour Checklist (CBCL) and an expert-rated structured parent interview to reflect a cross-informant view of OCB. Unexpectedly, self-reports of children with ADHD rather than children with TD showed the highest OCB scores in the LOI-CV. Qualitatively, ADHD-related OCB focused on the item subsets concerning 'dirt and contamination', 'repetition', 'overconscientiousness', and 'hoarding'. In the parent-rated CBCL, similar levels of OCB were reported for ADHD and TD patients. In contrast, only children with TD showed clinically relevant OCB according to expert ratings. Not only young TD patients but also children with ADHD should be investigated and monitored carefully for quantitative and qualitative aspects of OCB comorbidity.