Structure of obsessive-compulsive symptoms in pediatric OCD

Impact of Gender, Age at Onset, and Lifetime Tic Disorders on the Clinical Presentation and Comorbidity Pattern of Obsessive-Compulsive Disorder in Children and Adolescents

BACKGROUND

Obsessive-compulsive disorder (OCD) is a heterogeneous disorder; therefore, there is a need for identifying more homogeneous subtypes. This study aimed to examine the clinical characteristics and comorbidity pattern of a large sample of pediatric OCD subjects, and to examine the impact of gender, age at onset, and lifetime tic disorders on the clinical presentation and comorbidity pattern.

METHODS

A total of 110 children and adolescents diagnosed with OCD were assessed using the Kiddle Schedule for Affective Disorders and Schizophrenia for School Age Children-Present and Lifetime Version (K-SADS-PL) for psychiatric comorbidity, and a clinical data form was filled out. The cutoff for differentiating prepubertal from adolescent onset was 11 years of age.

RESULTS

A total of 83.6% of the subjects had at least one comorbid psychiatric disorder. Oppositional defiant disorder and contamination/somatic obsessions were significantly higher in males (p=0.036 and p=0.03, respectively) than in females. Depressive disorders and religious obsessions were significantly higher in the adolescent-onset group (p=0.02, p=0.05, respectively) whereas disruptive behavior disorders were higher in the prepubertal-onset group (p=0.037). Disruptive behavior disorders were significantly more frequent in the tic (+) group than in tic (-) group (p=0.021).

CONCLUSIONS

There were differences in the comorbidity pattern and clinical expression between genders and between prepubertal and adolescent-onset cases. Findings of this study supported the introduction of tic-related OCD as a specifier in Diagnostic and Statistical Manual of Mental Disorders, 5th ed. (DSM-5), and the necessity of a detailed assessment of other psychiatric disorders in youth with OCD.

Frequency and correlates of suicidal ideation in pediatric obsessive-compulsive disorder

This study examined the frequency and sociodemographic and clinical correlates of suicidal ideation in a sample of children and adolescents with obsessive-compulsive disorder (OCD). Fifty-four youth with OCD and their parent(s) were administered the Schedule for Affective Disorders and Schizophrenia for School-Age Children-Present and Lifetime, Children's Yale-Brown Obsessive Compulsive Scale, and Children's Depression Rating Scale-Revised. Children completed the Suicidal Ideation Questionnaire-Junior (SIQ-JR), Child Obsessive Compulsive Impact Scale-Child, and Multidimensional Anxiety Scale for Children; parents completed the Child Obsessive Compulsive Impact Scale-Parent, Swanson, Nolan, and Pelham-IV Parent Scale, and Young Mania Rating Scale-Parent Version. Seven youth endorsed clinically significant levels of suicidal ideation on the SIQ-JR. Suicidal ideation was significantly related to clinician-rated depressive symptoms, age, child-rated impairment and anxiety symptoms, and symmetry, sexuality/religiosity and miscellaneous symptom dimensions. There was no significant association between suicidal ideation and obsessive-compulsive symptom severity, comorbidity patterns, or several parent-rated indices (e.g., impairment, impulsivity). These results provide initial information regarding the frequency and correlates of suicidal ideation in treatment-seeking youth with OCD. Clinical implications are discussed, as well as directions for future research.

Hoarding in Children and Adolescents with Obsessive-Compulsive Disorder

Compared to studies in adults, there have been few studies of hoarding in children and adolescents with obsessive-compulsive disorder (OCD). In the current study, we evaluated OCD clinical features, Axis I disorders, and social reciprocity scores in 641 children and adolescents with OCD, of whom 163 (25%) had hoarding compulsions and 478 did not. We found that, as a group, youth with hoarding had an earlier age at onset and more severe lifetime OCD symptoms, poorer insight, more difficulty making decisions and completing tasks, and more overall impairment. The hoarding group also had a greater lifetime prevalence of panic disorder, specific phobia, Tourette disorder, and tics. As measured with the Social Reciprocity Scale, the hoarding group had more severe deficits in parent-rated domains of social communication, social motivation, and restricted interests and repetitive behavior. In a multivariable model, the overall social reciprocity score, age at onset of OCD symptoms, symmetry obsessions, and indecision were independently related to hoarding in these children and adolescents with OCD. These features should be considered as candidate risk factors for the development of hoarding behavior in pediatric OCD.

Hoarding behavior among young children with obsessive-compulsive disorder

Previous research has shown that among the various subtypes of obsessive-compulsive disorder (OCD), adults (e.g. Frost, Krause & Steketee, 1996) and older children and adolescents (Bloch et al., 2009; Storch et al., 2007) with problematic hoarding have distinct features and a poor treatment prognosis. However, there is limited information on the phenomenology and prevalence of hoarding behaviors in young children. The present study characterizes children ages 10 and under who present with OCD and hoarding behaviors. Sixty-eight children received a structured interview-determined diagnosis of OCD. Clinician administered, parent-report, and child-report measures on demographic, symptomatic, and diagnostic variables were completed. Clinician ratings of hoarding symptoms and parent and child endorsement of the hoarding item on the CY-BOCS checklist (Scahill, Riddle, McSwiggin-Hardin, & Ort, 1997) determined inclusion in the hoarding group (n=33). Compared to children without hoarding symptoms (n=35), the presence of hoarding symptoms was associated with an earlier age of primary diagnosis onset and a higher proportion of ADHD and provisional anxiety diagnoses. These results are partially consistent with the adult literature and with findings in older children (Storch et al., 2007). Additional data on clinical presentation and phenomenology of hoarding are needed to form a developmentally appropriate definition of the behavior.

Children's Yale-Brown obsessive compulsive scale in autism spectrum disorder: component structure and correlates of symptom checklist

OBJECTIVE

Repetitive behaviors in autism spectrum disorders (ASD) range from motor stereotypy to immersion in restricted interests. The modified Children's Yale-Brown Obsessive Compulsive Scale for children with autism spectrum disorder (CYBOCS-ASD) includes a Symptom Checklist (behavior present or absent) and 5 severity scales (Time Spent, Interference, Distress, Resistance and Control).

METHOD

We assembled CYBOCS-ASD data from 3 Research Units on Pediatric Psychopharmacology Autism Network trials to explore the component structure of repetitive behaviors in children with ASD. Raters trained to reliability conducted the CYBOCS-ASD in 272 medication-free subjects. Fifteen Symptom Checklist items were endorsed for less than 5% of the sample and were dropped. Principal component analysis was used to explore the clustering of 23 checklist items. Component scores computed for each subject were correlated with other measures. We also examined the distribution of severity scales.

RESULTS

The subjects (229 boys and 43 girls; mean age = 7.8 ± 2.6 years) met criteria for an ASD; half were intellectually disabled. The PCA resulted in a 5-component solution to classify repetitive behaviors (34.4% of the variance): hoarding and ritualistic behavior; sensory and arranging behavior; sameness and self-injurious behavior; stereotypy; restricted interests. Sensory and arranging and stereotypy components were associated with lower adaptive functioning (Pearson r = 0.2-0.3; p < .003). The resistance scale showed little variation, with more than 60% of the sample with the highest score.

CONCLUSIONS

Rarely endorsed items can be dropped from the Checklist. The resistance item does not appear to be relevant for children with ASD.

Spanish version of the Dimensional Obsessive-Compulsive Scale (DOCS): psychometric properties and relation to obsessive beliefs

OBJECTIVES

Our main goal was to provide the psychometric properties of the Spanish version of the Dimensional Obsessive-Compulsive Scale (DOCS) in a non-clinical sample (n = 237) and in adult patients with Obsessive-Compulsive Disorder (OCD) (n = 110). We also examined the association between OC symptom dimensions and obsessive beliefs.

METHODS

The psychometric properties involved four steps: reliability, structural validity, convergent and discriminant validity and diagnostic sensitivity. Linear regression analyses were used to assess the associations between OC symptoms and obsessive beliefs.

RESULTS

Exploratory and confirmatory factor analyses replicated the original four-factor structure in both samples. The DOCS showed good performance in terms of internal consistency, test-retest reliability and convergent validity in both samples. The DOCS showed better diagnostic sensitivity than another self-report instrument of OC symptoms, the Obsessive-Compulsive Inventory Revised. Findings of the relationship between obsessive beliefs and OC symptoms revealed that certain obsessive beliefs predicted specific OC symptom dimensions.

CONCLUSIONS

The Spanish version of the DOCS has similar psychometric properties than the original English instrument, although its performance is somewhat better in OCD patients than in students. It will be important to ascertain its ability to discriminate OCD from other associated disorders.

Obsessive-compulsive symptoms and obsessive-compulsive disorder in adolescents: a population-based study

OBJECTIVES

To estimate the prevalence of obsessive-compulsive symptoms (OCS) and disorder (OCD) among adolescents and to describe OCD characteristics according to gender.

METHODS

Participants were selected by cluster sampling at seven high-schools in southern Brazil. In the first stage, 2,323 students were screened for OCS; in the second stage, adolescents scoring ≥ 21 on the OCI-R scale were individually interviewed. OCD diagnosis was established using a semi-structured interview (Schedule for Affective Disorders and Schizophrenia for School Aged Children: Present and Lifetime Version - K-SADS-PL).

RESULTS

The past-month estimated prevalence of OCS was 18.3%, and the point estimated prevalence of OCD, 3.3%. Girls showed higher scores (OCS: 24.8 vs. 14.4%; OCD: 4.9 vs. 1.4%; p < 0.001). Only 9.3% of OCD adolescents had been diagnosed and 6.7% received treatment. The most frequent/severe DY-BOCS dimensions were miscellaneous (86.7%; mean score 6.3 ± 3.8) and symmetry (85.3%; 5.9 ± 3.8). Female OCD adolescents predominantly showed depression (p = 0.032), and male adolescents, tic disorders (p = 0.006).

CONCLUSIONS

OCD is underdiagnosed in adolescents, and few are treated. Future studies should investigate the relationship between OCS and the onset of OCD.

Are the symptoms of obsessive-compulsive disorder temporally stable in children/adolescents? A prospective naturalistic study

Obsessive-compulsive disorder (OCD) symptoms tend to be temporally stable in adults, but much less is known about their stability in young people. We examined the temporal stability of OCD symptoms in a clinical pediatric sample. As part of a naturalistic longitudinal study, 74 children and adolescents with OCD were assessed with the Children's Yale-Brown Obsessive Compulsive Scale on two separate occasions ranging from 1 to 11 years apart (average 5 years). Analysis of variance and multiple regression models examined changes within and between symptoms and symptom dimensions. Changes within individual symptom categories were observed in approximately 15-45% of the cases, depending on the specific symptom. In most of those cases, symptoms went from present to absent at follow-up rather than from absent to present. Changes were no longer significant when individuals who were in remission at follow-up were excluded. Multiple regression analyses indicated that the strongest predictor of a particular symptom dimension at follow-up was the presence of the same dimension at baseline. Shifts from one dimension to another were rare. The content of OCD symptoms is relatively stable across time in young people. Most changes observed were attributable to clinical improvement/remission and occurred within rather than between symptom dimensions.

Antipsychotic augmentation of selective serotonin reuptake inhibitors in resistant tic-related obsessive-compulsive disorder in children and adolescents: a naturalistic comparative study

The aim of this study is to assess efficacy of augmentation of SSRIs with risperidone or aripiprazole in youths with tic-related Obsessive-Compulsive Disorder (OCD) non responders to an SSRI monotherapy. 120 consecutive patients (age range 7-18 years) were treated with an SSRI monotherapy for at least 12 weeks, 51 (42.5%) were responders, and the 69 non-responders (mean age 13.7 ± 2.4 years) were included in this study. 35 patients received an augmentation with risperidone (1.7 ± .8 mg/day), and 34 with aripiprazole (8.9 ± 3.1 mg/day) for 12 weeks. Regarding the OCD symptomatology, at the endpoint the Clinical Global Impression-Severity score (CGI-S) improved from 5.6 ± .8 (severely ill), to 3.2 ± .9 (mild to moderately ill) (p < .0001), and the Children-Global Assessment Scale (C-GAS) from 40.3 ± 5.2 to 53.8 ± 9.2 (p < .0001). Thirty-nine patients (56.5%) were responders in OCD symptomatology (CGI-I score 1 or 2, CGI-S score 3 or less and C-GAS score 50 or more during three consecutive months after a 12-week treatment). Compared to non responders, they were less impaired at the baseline in CGI-S (p < .0001) and C-GAS (p < .0001). Subtypes of OCD and comorbidity did not affect the response. No differences were found between risperidone and aripiprazole augmentation. 47 patients (68.1%) significantly improved tics, without differences between risperidone and aripiprazole. None discontinued medications because of side effects, but risperidone was associated with weight gain and sedation, and aripiprazole to mild/moderate agitation. In tic-related pediatric OCD, augmentation of SSRIs with risperidone or aripiprazole was tolerated and effective in about half of the patients non responding to an SSRI.

Is ADHD in childhood associated with lifetime hoarding symptoms? An epidemiological study

BACKGROUND

Although hoarding symptoms have been traditionally conceptualized as part of obsessive-compulsive disorder (OCD), recent data suggest that they may be more closely related to attention-deficit hyperactivity (ADHD) symptoms and, in particular, inattention. The aim of the present epidemiological study was to investigate the association between retrospectively reported ADHD symptoms in childhood and lifetime hoarding symptoms.

METHODS

Retrospectively reported childhood ADHD, and lifetime hoarding and obsessive-compulsive symptoms were assessed with the Composite International Diagnostic Interview 3.0 in a random subsample of individuals (n = 2,963) participating in a cross-sectional survey of the adult general population of nine European countries, as part of the World Mental Health (WMH) Surveys.

RESULTS

Lifetime hoarding symptoms were more common among individuals with childhood ADHD symptoms than those without ADHD symptoms (8.9% versus 2.7%, P = 0.024). Childhood inattention (but not hyperactivity) was associated with lifetime hoarding symptoms (OR = 6.04, 95% CI = 3.59-10.1) and this association remained significant after controlling for the presence of obsessive-compulsive symptoms.

CONCLUSION

Longitudinal studies are now needed to explore the hypothesis that inattention symptoms in childhood may be a precursor of hoarding difficulties later in life.

Sexual obsessions in pediatric obsessive-compulsive disorder: clinical characteristics and treatment outcomes

BACKGROUND

Sexual obsessions are common in adults with obsessive-compulsive disorder (OCD), cause great distress, and are sometimes misinterpreted as indicating risk to others. Little is known about the prevalence, clinical correlates, and prognosis of such symptoms in young people.

METHODS

Three hundred and eighty-three patients referred to a specialist pediatric OCD clinic were administered a series of measures at intake and, for those treated at the clinic, again after treatment. Patients with and without sexual obsessions were compared on socio-demographic and clinical characteristics. Mixed model analyses of variance compared treatment outcomes in both groups.

RESULTS

A quarter of patients had sexual obsessions at baseline (age range 8-17); they had slightly more severe OCD symptoms and were more depressed than those without sexual obsessions. Aggressive and religious obsessions, magical thinking, fear of saying certain things, repeating rituals, superstitious games, mental rituals, and the need to tell, ask, or confess were more frequent in participants with sexual obsessions. Crucially, no differences in treatment outcome were found between the groups.

CONCLUSIONS

Sexual obsessions are common in pediatric OCD, even in very young children. Although they may be associated with particular clinical features, they do not interfere with treatment response. The occurrence of sexual obsessions in children should be recognized and these symptoms understood as ordinary, nonthreatening OCD symptoms, which pose no risk to others. They respond to the standard treatment strategies, so children and families should receive the usual message of optimism regarding the chances of recovery.

Prevalence, comorbidity and heritability of hoarding symptoms in adolescence: a population based twin study in 15-year olds

BACKGROUND

Hoarding Disorder (HD) is often assumed to be an 'old age' problem, but many individuals diagnosed with HD retrospectively report first experiencing symptoms in childhood or adolescence. We examined the prevalence, comorbidity and etiology of hoarding symptoms in adolescence.

METHODS

To determine the presence of clinically significant hoarding symptoms, a population-based sample of 15-year old twins (N = 3,974) completed the Hoarding Rating Scale-Self Report. Co-occurring Obsessive Compulsive Disorder (OCD), Autism Spectrum Disorders (ASD) and Attention Deficit Hyperactivity Disorder (ADHD) were estimated from parental report. Model-fitting analyses divided hoarding symptom scores into additive genetic, shared, and non-shared environmental effects.

RESULTS

The prevalence of clinically significant hoarding symptoms was 2% (95% CI 1.6-2.5%), with a significantly higher prevalence in girls than boys. Exclusion of the clutter criterion (as adolescents do not have control over their environment) increased the prevalence rate to 3.7% (95% CI 3.1-4.3%). Excessive acquisition was reported by 30-40% among those with clinically significant hoarding symptoms. The prevalence of co-occurring OCD (2.9%), ASD (2.9%) and ADHD (10.0%) was comparable in hoarding and non-hoarding teenagers. Model-fitting analyses suggested that, in boys, additive genetic (32%; 95% CI 13-44%) and non-shared environmental effects accounted for most of the variance. In contrast, among girls, shared and non-shared environmental effects explained most of the variance, while additive genetic factors played a negligible role.

CONCLUSIONS

Hoarding symptoms are relatively prevalent in adolescents, particularly in girls, and cause distress and/or impairment. Hoarding was rarely associated with other common neurodevelopmental disorders, supporting its DSM-5 status as an independent diagnosis. The relative importance of genetic and shared environmental factors for hoarding differed across sexes. The findings are suggestive of dynamic developmental genetic and environmental effects operating from adolescence onto adulthood.

Hoarding behaviour in an Italian non-clinical sample

BACKGROUND

Hoarding is associated with significant impairment. Although traditionally considered as a symptom of obsessive-compulsive disorder (OCD), some authors have proposed that pathological hoarding could be considered as a stand alone condition. The prevalence of pathological hoarding behaviour has been shown to be high in some countries, but little is known about the prevalence and correlates of hoarding in the non-clinical population in Italy.

METHOD

We studied the prevalence of self-reported hoarding behaviour using the Italian version of the Saving Inventory-Revised, as well as the association between hoarding and various clinical correlates, including obsessive-compulsive symptoms, compulsive buying, anxiety, and depression.

RESULTS

The prevalence of pathological hoarding behaviour in two studies was between 3.7 and 6.0%. No differences were found between hoarding and non-hoarding participants with regard to gender, age, marital status, level of education, and employment status. Significant correlations were found between compulsive hoarding and obsessive-compulsive symptoms and also between hoarding and a measure of compulsive buying, even after controlling for anxiety and depressive symptoms.

CONCLUSIONS

These results indicate that pathological hoarding may also be prevalent in Italy and highlight the need for further epidemiological studies using validated instruments to assess hoarding disorder.

Core OCD symptoms: exploration of specificity and relations with psychopathology

Obsessive-compulsive disorder (OCD) is a heterogeneous condition, comprised of multiple symptom domains. This study used aggregate composite scales representing three core OCD dimensions (Checking, Cleaning, and Rituals), as well as Hoarding, to examine the discriminant validity, diagnostic specificity, and predictive ability of OCD symptom scales. The core OCD scales demonstrated strong patterns of convergent and discriminant validity - suggesting that these dimensions are distinct from other self-reported symptoms - whereas hoarding symptoms correlated just as strongly with OCD and non-OCD symptoms in most analyses. Across analyses, our results indicated that Checking is a particularly strong, specific marker of OCD diagnosis, whereas the specificity of Cleaning and Hoarding to OCD was less strong. Finally, the OCD Checking scale was the only significant predictor of OCD diagnosis in logistic regression analyses. Results are discussed with regard to the importance of assessing OCD symptom dimensions separately and implications for classification.

The epidemiology of obsessive--compulsive disorder in Spanish school children

We aimed to assess the prevalence (at three levels of severity) and other epidemiological data of OCD in a sample of 1,514 Spanish non-referred children. The estimated prevalence was 1.8% for OCD, 5.5% for subclinical OCD and 4.7% for OC symptomatology. We did not find significant differences between genders or academic grade regarding OC symptoms and OCD, but more subclinical prevalence was found in males than in females. Socio-demographic variables were not related to any level of OCD, but academic performance was significantly lower in clinical OCD. The co-morbidity between OCD and any psychiatric disorder was high (85%) and higher for emotional disorders than for behavioral disorders. The impairment was associated with comorbidity and was worse for OCD with comorbid emotional problems. The results suggest that OCD is not rare in school children and adolescents and that it has an impact on their personal functioning. We suggest the possibility of an early diagnosis and treatment.

Human preferences for symmetry: subjective experience, cognitive conflict and cortical brain activity

This study examines the links between human perceptions, cognitive biases and neural processing of symmetrical stimuli. While preferences for symmetry have largely been examined in the context of disorders such as obsessive-compulsive disorder and autism spectrum disorders, we examine various these phenomena in non-clinical subjects and suggest that such preferences are distributed throughout the typical population as part of our cognitive and neural architecture. In Experiment 1, 82 young adults reported on the frequency of their obsessive-compulsive spectrum behaviors. Subjects also performed an emotional Stroop or variant of an Implicit Association Task (the OC-CIT) developed to assess cognitive biases for symmetry. Data not only reveal that subjects evidence a cognitive conflict when asked to match images of positive affect with asymmetrical stimuli, and disgust with symmetry, but also that their slowed reaction times when asked to do so were predicted by reports of OC behavior, particularly checking behavior. In Experiment 2, 26 participants were administered an oddball Event-Related Potential task specifically designed to assess sensitivity to symmetry as well as the OC-CIT. These data revealed that reaction times on the OC-CIT were strongly predicted by frontal electrode sites indicating faster processing of an asymmetrical stimulus (unparallel lines) relative to a symmetrical stimulus (parallel lines). The results point to an overall cognitive bias linking disgust with asymmetry and suggest that such cognitive biases are reflected in neural responses to symmetrical/asymmetrical stimuli.

Predictors of medium and long-term outcome following capsulotomy for obsessive-compulsive disorder: one site may not fit all

Patients with treatment-refractory obsessive-compulsive disorder (OCD) are sometimes considered for surgical interventions. The identification of reliable predictors of outcome following such interventions would be of great clinical importance, as it would lead to stricter selection of suitable patients, thus avoiding unnecessary surgery and improving the overall response rate. We analyzed data from 24 severe treatment-resistant patients who underwent capsulotomy for OCD and were carefully followed-up one year after the surgery and at long term (mean 10.8 years after surgery). The Yale-Brown Obsessive Compulsive Scale Symptom Checklist was administered to assess the lifetime presence of the most common symptom types. We applied an algorithm to calculate the patients' scores on 4 well-established symptom dimensions: Contamination/cleaning, forbidden thoughts, symmetry/order and hoarding. Multiple regression models were employed to examine whether scores on certain symptom dimensions were predictive of long-term outcome. The presence and number of lifetime symptoms in the symmetry/order domain were associated with greater severity of OCD, depression and anxiety, as well as greater impairment in various functional domains like work, social and family life at both one-year and long-term follow-ups. These results remained consistently significant after controlling for preoperative psychopathology, scores on other OCD symptom dimensions, sex, age, age of onset, duration of follow-up, type of surgical procedure, number of operations and lesion volume. The results could have implications for existing ablative and deep brain stimulation protocols and challenge our current conceptualization of OCD as a unitary diagnostic entity with a single neurobiological substrate.

A review of obsessive-compulsive disorder in children and adolescents

This article is a review of recent literature on obsessive-compulsive disorder in the pediatric population. Areas covered include: a brief historical perspective, clinical presentation in relation to symptoms found in different age groups, epidemiology, psychiatric comorbidity, etiology (with regards to genetics, neuroimaging, and familial factors), clinical course and prognosis, and treatment, with special emphasis on individual and family-based cognitive-behavioral therapy and psychopharmacology.

Cognitive functioning in compulsive hoarding

The aim of this study is to determine whether neurocognitive performance distinguishes individuals with compulsive hoarding (CH) from those with obsessive-compulsive disorder (OCD). Compared to control subjects, OCD patients and CHs scored significantly worse on the Serial Reaction Time Task suggesting disturbed implicit memory in both patient groups. On the Iowa Gambling Task, an overall learning progression difference over time was found between the CHs, OCD group, and control subjects, suggesting differences in decision-making between the groups. The groups did not differ in performance on the Stop Signal Reaction Time Task (motor inhibition). This study found evidence for impaired implicit memory in CHs, but also in OCD patients, albeit less severe. There was evidence that OCD patients learned more slowly on a decision-making task than CHs and control subjects. This latter finding provides some evidence to suggest that CH and OCD have, at least on this one measure, differing cognitive substrates.

Obsessive-compulsive disorder in children and adolescents: symptom dimensions in a naturalistic setting

BACKGROUND

Obsessive-compulsive disorder (OCD) is a frequent and clinically heterogeneous disorder. The complex clinical presentation can be summarized using a few consistent and temporally stable symptom dimensions. Only few studies in children and adolescents have examined the importance of symptom dimensions.

AIMS

This retrospective study was undertaken to describe the relation between symptom dimensions, pattern of comorbidity and family disposition, in a sample of Danish children and adolescents with OCD assessed in a naturalistic setting.

METHODS

A retrospective study of children and adolescents (n=83) diagnosed with OCD in the period 1998-2004, at the Psychiatric Hospital for Children and Adolescents, Risskov, Denmark. Information from clinical records was systematically collected and Children's Yale-Brown Obsessive-compulsive Scale (CY-BOCS) scores and symptom checklists were obtained.

RESULTS

High scores on the symmetry/ordering dimension were related to OCD in first-degree relatives and high scores on the aggressive/checking dimension were associated to comorbidity with tic disorders. We showed a correlation between limited insight and younger age.

CONCLUSION

This is one of the first studies to examine symptom dimensions in children and adolescents in naturalistic settings. The results were comparable with those in adult studies, showing an association between the occurrence of the symmetry/ordering dimension and family OCD and the occurrence of the aggressive/checking dimension and comorbid tic disorders. In small children, insight into symptoms may be limited.

Latent class analysis of the Yale-Brown Obsessive-Compulsive Scale symptoms in obsessive-compulsive disorder

OBJECTIVE

Obsessive-compulsive disorder (OCD) is phenomenologically heterogeneous, and findings of underlying structure classification based on symptom grouping have been ambiguous to date. Variable-centered approaches, primarily factor analysis, have been used to identify homogeneous groups of symptoms; but person-centered latent methods have seen little use. This study was designed to uncover sets of homogeneous groupings within 1611 individuals with OCD based on symptoms.

METHOD

Latent class analysis models using 61 obsessive-compulsive symptoms collected from the Yale-Brown Obsessive-Compulsive Scale were fit. Relationships between latent class membership and treatment response, sex, symptom severity, and comorbid tic disorders were tested for relationship to class membership.

RESULTS

Latent class analysis models of best fit yielded 3 classes. Classes differed only in frequency of symptom endorsement. Classes with higher symptom endorsement were associated with earlier age of onset, being male, higher Yale-Brown Obsessive-Compulsive Scale symptom severity scores, and comorbid tic disorders. There were no differences in treatment response between classes.

CONCLUSIONS

These results provide support for the validity of a single underlying latent OCD construct, in addition to the distinct symptom factors identified previously via factor analyses.

Predictors of early adulthood quality of life in children with obsessive-compulsive disorder

OBJECTIVES

The goal of this study was to determine childhood clinical predictors of quality of life (QoL) in early adulthood in children with obsessive-compulsive disorder (OCD).

METHODS

A longitudinal cohort study was conducted with 36 (out of 62 eligible) children with OCD, interviewed once at childhood baseline (mean age 12.1 ± 2.1, range 8.0-15.8), and again in early adulthood after an average follow-up interval of 9 years. QoL was measured in adulthood with the longitudinal interval follow-up evaluation range of impaired functioning tool (LIFE-RIFT).

RESULTS

Forty-two percent of children experienced a remission of OCD symptoms by early adulthood. OCD appeared to most strongly impair the interpersonal relationships and work domains of QoL. QoL and severity of OCD and anxiety symptoms were significantly associated in early adulthood. Primary hoarding symptoms in childhood predicted poor QoL in adulthood. Increased symptoms in the forbidden thoughts dimension in both childhood and adulthood were associated with improved adulthood QoL.

CONCLUSIONS

Children for whom OCD symptoms remitted by adulthood showed no evidence of residual impairment in QoL, whereas children whose OCD symptoms failed to remit by adulthood showed at most mild impairment in QoL. Hoarding symptoms in childhood appear to portend not only the persistence of OCD symptoms but also poorer QoL in early adulthood.

Compulsive hoarding in children

This article discusses the nature and treatment of compulsive hoarding among children. We summarize the phenomenology of compulsive hoarding, including its clinical presentation, comorbidity with varied mental disorders, and associated impairment. The limited data on treatment outcome are presented along with a behavioral framework that we utilized to treat youth who hoard. Our approach is highlighted in the context of a case illustration of an 11-year-old girl suffering from compulsive hoarding and several comorbid mental health disorders. We conclude with recommendations for clinical work with this challenging and neglected population.

General and maladaptive personality dimensions in pediatric obsessive-compulsive symptoms

Obsessive-compulsive disorder (OCD) is a chronic and impairing clinical disorder in childhood, often characterized by a heterogeneous symptomatic profile and high co-occurrence with other disorders. The present study introduces a new perspective on the description of OCD symptoms in youth, and empirically examines the value of a personality framework (e.g. Five Factor of Personality; FFM) for understanding early OCD symptomatology in a referred sample of 274 children and adolescents, relying on age-specific measures of general and maladaptive personality. Differences in general and maladaptive personality traits for high versus low-scoring children and adolescents on the Obsessive-Compulsive Scale of the Child Behavior Checklist (CBCL-OCS) were explored. The discriminant validity of both higher-and lower-order personality traits was supported, showing that high CBCL-OCS scorers are characterized by specific personality features ranging from adaptive to pathological, especially in terms of Conscientiousness. In addition, personality traits contributed to the accurate classification of high- versus low-scorers on the CBCL-OCS. Implications for clinical practice and recommendations for future research are discussed.

Understudied clinical dimensions in pediatric obsessive compulsive disorder

The present study aimed to assess the phenomenology and treatment sensitivity of insight, avoidance, indecisiveness, overvalued responsibility, pervasive slowness, and pathological doubting among youth with Obsessive-compulsive disorder (OCD) using the ancillary items on the Children's Yale-Brown Obsessive Compulsive Scale (CY-BOCS). These factors are believed to be relevant to the clinical presentation of youth with OCD but remain understudied. Eighty-nine youth with OCD were administered the CY-BOCS, including six subsidiary items aimed at the constructs of interest in this research. Participants also completed measures of OCD symptom clusters, depressive and anxious symptoms, externalizing/internalizing behavioral problems, and functional impairment. Associations between OCD symptom clusters and insight, avoidance, indecisiveness, overvalued responsibility, pervasive slowness, and pathological doubting are presented. Low insight, significant avoidance, indecisiveness, pervasive slowness and excessive sense of responsibility were all related to elevations in functional impairment. Clinical improvement in OCD severity was related to reductions in avoidance, doubting, and sense of responsibility. The six ancillary items of the CY-BOCS appear to be a practical and valid assessment of several constructs that are prognostically linked to cognitive-behavioral therapy outcomes in youth with OCD. Implications for clinicians are discussed.

Aripiprazole augmentation in 39 adolescents with medication-resistant obsessive-compulsive disorder

The aim of this study was to assess efficacy of aripiprazole augmentation of serotonin reuptake inhibitor (SRI) treatment in adolescents with obsessive-compulsive disorder (OCD) who did not respond to 2 initial trials with SRI monotherapy. A consecutive series of 39 adolescents (28 males and 11 females; age range, 12 to 18 years; mean age, 14.6 ± 1.2 years), with OCD diagnosed based on a clinical interview and according to the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition criteria, were included. The mean final aripiprazole dosage was 12.2 ± 3.4 mg/d. At the endpoint, 27 patients (59.0%) had a Clinical Global Impression (CGI)-Improvement score 1 or 2 (very much or much improved) and a Clinical Global Impression-Severity (CGI-S) score 3 or below and were thus considered responders. The CGI-S improved from 6.0 ± 0.9 at the baseline (severely to extremely severely ill) to 3.5 ± 1.0 (mild to moderately ill) at the end of the follow-up (P < 0.0001), whereas the Children's Global Assessment Scale improved from 39.2 ± 5.8 to 49.8 ± 9.0 (P < 0.0001). Compared with nonresponders, responders were less impaired at the baseline in functional impairment (Children's Global Assessment Scale; P = 0.004) but not in clinical severity (CGI-S). Subtypes of OCD comorbidity and absence of insight did not affect clinical response. Mild transitory agitation (10.3%), mild sedation (10.3%), and sleep disorders (7.7%) were reported, but any of the patients discontinued medication because of adverse effects.In these severely impaired adolescents, aripiprazole augmentation of SRIs was well tolerated and effective in more than half of the patients.

Obsessive-compulsive symptom dimensions in the general population: results from an epidemiological study in six European countries

BACKGROUND

The prevalence of obsessive-compulsive symptom dimensions and their sociodemographic and psychopathological correlates at the population level are unknown.

METHOD

Obsessive-compulsive symptom dimensions and mental disorders were assessed with the Composite International Diagnostic Interview 3.0 in a random subsample (n=2804) of individuals participating in a cross-sectional survey of the adult general population of six European countries.

RESULTS

The lifetime prevalence of any obsessive-compulsive symptom dimension was 13%. Harm/Checking was the most prevalent dimension (8%) followed by Somatic obsessions (5%) and Symmetry/Ordering (3%). Females were more likely to have symptoms in Contamination/Cleaning (OR=3, 95%CI=1.06-8.51) and Somatic obsessions (OR=1.88, 95%CI=1.05-3.37). All symptom dimensions were associated with an increased risk of most mental (but not physical) disorders. There were some differences in prevalence between countries.

LIMITATIONS

The interference associated with each symptom dimension could not be assessed. Few direct data are available on the validity of the CIDI to assess obsessive-compulsive symptom dimensions.

CONCLUSIONS

Obsessive-compulsive symptom dimensions are relatively frequent in the general population. Their sociodemographic and psychopathological correlates may be slightly different in clinical and community samples. They are associated with an increased risk of most mental disorders.

Hoarding disorder: a new diagnosis for DSM-V?

This article provides a focused review of the literature on compulsive hoarding and presents a number of options and preliminary recommendations to be considered for DSM-V. In DSM-IV-TR, hoarding is listed as one of the diagnostic criteria for obsessive-compulsive personality disorder (OCPD). According to DSM-IV-TR, when hoarding is extreme, clinicians should consider a diagnosis of obsessive-compulsive disorder (OCD) and may diagnose both OCPD and OCD if the criteria for both are met. However, compulsive hoarding seems to frequently be independent from other neurological and psychiatric disorders, including OCD and OCPD. In this review, we first address whether hoarding should be considered a symptom of OCD and/or a criterion of OCPD. Second, we address whether compulsive hoarding should be classified as a separate disorder in DSM-V, weighing the advantages and disadvantages of doing so. Finally, we discuss where compulsive hoarding should be classified in DSM-V if included as a separate disorder. We conclude that there is sufficient evidence to recommend the creation of a new disorder, provisionally called hoarding disorder. Given the historical link between hoarding and OCD/OCPD, and the conservative approach adopted by DSM-V, it may make sense to provisionally list it as an obsessive-compulsive spectrum disorder. An alternative to our recommendation would be to include it in an Appendix of Criteria Sets Provided for Further Study. The creation of a new diagnosis in DSM-V would likely increase public awareness, improve identification of cases, and stimulate both research and the development of specific treatments for hoarding disorder.

Symptom dimensions in OCD: item-level factor analysis and heritability estimates

To reduce the phenotypic heterogeneity of obsessive-compulsive disorder (OCD) for genetic, clinical and translational studies, numerous factor analyses of the Yale-Brown Obsessive Compulsive Scale checklist (YBOCS-CL) have been conducted. Results of these analyses have been inconsistent, likely as a consequence of small sample sizes and variable methodologies. Furthermore, data concerning the heritability of the factors are limited. Item and category-level factor analyses of YBOCS-CL items from 1224 OCD subjects were followed by heritability analyses in 52 OCD-affected multigenerational families. Item-level analyses indicated that a five factor model: (1) taboo, (2) contamination/cleaning, (3) doubts, (4) superstitions/rituals, and (5) symmetry/hoarding provided the best fit, followed by a one-factor solution. All 5 factors as well as the one-factor solution were found to be heritable. Bivariate analyses indicated that the taboo and doubts factor, and the contamination and symmetry/hoarding factor share genetic influences. Contamination and symmetry/hoarding show shared genetic variance with symptom severity. Nearly all factors showed shared environmental variance with each other and with symptom severity. These results support the utility of both OCD diagnosis and symptom dimensions in genetic research and clinical contexts. Both shared and unique genetic influences underlie susceptibility to OCD and its symptom dimensions.

Disorganization of anatomical connectivity in obsessive compulsive disorder: a multi-parameter diffusion tensor imaging study in a subpopulation of patients

Obsessive-compulsive disorder (OCD) is thought to involve large-scale brain systems but the anatomical connectivity via association fibers has not been specifically investigated yet. We evaluated organization and directionality of the major fiber bundles in a subpopulation of OCD, including washers and checkers who presented decision making deficits, by measuring MRI parameters related to water self-diffusion (Fractional Anisotropy, FA) and fiber directionality (Principal Diffusion Direction, PDD) in 15 OCD and 16 control subjects. OCD patients showed significantly lower FA and altered PDD along the corpus callosum, cingulum, superior longitudinal fasciculus, and inferior fronto-occipital fasciculus bilaterally. The track-based analysis of the inferior fronto-occipital fasciculus confirmed a significant bilateral FA reduction. Lower FA values in the inferior fronto-occipital fasciculus, superior longitudinal fasciculus and corpus callosum correlated with symptom severity and neuropsychological performance. This multi-parameter MRI study revealed specific white matter abnormalities in OCD suggesting tract disorganization as main feature, reflected by local changes in fiber directionality. This altered anatomical connectivity might play a specific role in OCD pathophysiology.

Fear of harm, a possible phenotype of pediatric bipolar disorder: a dimensional approach to diagnosis for genotyping psychiatric syndromes

BACKGROUND

In a prior concordance study of affected sibling pairs with a community diagnosis of pediatric bipolar disorder (PBD) a behavioral phenotype termed Fear of Harm (FOH) was found to have one of the strongest concordance coefficients (rho) between probands and siblings, and the widest contrasts between the rho-estimates for the proband/sibling vs. proband/comparison pairs [Papolos, D., Hennen, J., Cockerham, M.S, Lachman, H., 2007]. A strategy for identifying phenotypic subtypes: concordance of symptom dimensions between sibling pairs who met screening criteria for a genetic linkage study of childhood-onset bipolar disorder using the Child Bipolar Questionnaire (CBQ) was employed. J. Affect. Disord. 99, 27-36.]. We used the Child Bipolar Questionnaire (OUT) (CBQ) to further elucidate this behavioral phenotype of PBD. We hypothesized that selective factors including parent reported symptoms of mania and depression, would be distinguishing features of impairment between groups defined by 1) the magnitude of their score on a continuous measure of FOH, and 2) the high FOH group would have significantly greater levels of severity on course of illness variables. These measures included earlier age of onset of first psychiatric symptoms, first hospitalization, and frequency of psychiatric hospitalizations, as well as, degree of social impairment as determined by exposure to the juvenile justice system and school performance problems.

METHODS

The sample was comprised of children with community diagnoses of bipolar disorder or at risk for the illness based on enriched family history with multiple first degree relatives diagnosed with BPD (N=5335). Included were all subjects who had >40 positively endorsed CBQ symptom items at frequencies of very often, almost always, and always. This group was divided randomly into two groups, the exploratory group (N=2668) and the hypothesis testing (study) group (N=2666). The exploratory group was used for the development of hypotheses and the study group was used to test these hypotheses on a new set of data. All results reported here derive from the latter group. In subsequent analyses, we classified each child as having a high degree of FOH, low FOH, or no FOH. We examined a subset of the sample for differences in age of onset of first psychiatric symptoms, course of illness and measures of symptom severity. These groups were compared using the chi-square procedure for categorical data and the Analysis of Variance (ANOVA) with Scheffe pair wise tests for continuous variables. The Child Bipolar Questionnaire V.2.0, the Yale-Brown Obsessive Compulsive Scale (YBOCS) and the Overt Aggression Scale (OAS) were the principal instruments used to obtain diagnostic information for this study.

RESULTS

We found that children representative of the FOH phenotype when compared to children with PBD who lack this trait had higher indices of severity of mania and depression, as well as other indices that reflect severity and course of illness. Trait factors were derived from a factor analysis of CBQ in a large population of children diagnosed with or at risk for PBD, and used to further elucidate trait features of children with FOH. Children with the FOH traits were also more likely to be defined by six CBQ factors; Sleep/Arousal, Harm to Self and Others, Territorial Aggression, Anxiety, Self-esteem, Psychosis/Parasomnias/Sweet Cravings/Obsessions (PPSO).

LIMITATIONS

This data is derived from samples enriched with bipolar disorder cases. Further validation is needed with samples in which childhood-onset BD is rarer and diagnoses more diverse. Clinician diagnosis was not validated via research interview.

CONCLUSIONS

The FOH phenotype, as defined by a metric derived from combining items from the YBOCS/OAS, is a clinically homogeneous behavioral phenotype of PBD with early age of onset, severe manic and depressive symptoms, and significant social impairment that is strongly associated with 6 CBQ factors and can be easily identified using the CBQ. Through the examination of dimensional features of PBD in an enriched sample of large size, we were able to further refine a phenotype and identify clinical dimensions potentially linked to endophenotypic markers that may prove fruitful in differential diagnosis, treatment and etiological studies of PBD. The nature of the sets of specific symptoms that comprise the FOH factors enabled us to propose a biological model for the phenotype (OUT) that involves a complex orexigenic circuit which links hypothalamic, limbic, and other brain nuclei primarily responsible for the regulation of behavioral and proposed physiological features of the FOH phenotype.

Neural correlates of symptom dimensions in pediatric obsessive-compulsive disorder: a functional magnetic resonance imaging study

OBJECTIVE

Neuroimaging studies have identified distinct neural correlates of obsessive-compulsive disorder (OCD) symptom dimensions in adult subjects and may be related to functional abnormalities in different cortico-striatal-thalamic neural systems underlying cognition and affective processing. Similar symptom dimensions are apparent in childhood and adolescence, but their functional neural correlates remain to be elucidated.

METHOD

Pediatric subjects with OCD (n = 18) and matched controls (n = 18), ages 10 to 17 years, were recruited for two functional magnetic resonance imaging experiments. They were scanned while viewing alternating blocks of symptom provocation (contamination-related or symmetry-related) and neutral pictures and imagining scenarios related to the content of each picture type.

RESULTS

The subjects with OCD demonstrated reduced activity in the right insula, putamen, thalamus, dorsolateral prefrontal cortex, and left orbitofrontal cortex (contamination experiment) and in the right thalamus and right insula (symmetry experiment). Higher scores on OCD symptom-related measures (contamination and total severity) were significantly predictive of reduced neural activity in the right dorsolateral prefrontal cortex during the contamination experiment.

CONCLUSIONS

Our findings indicate reduced activity in neural regions underlying emotional processing, cognitive processing, and motor performance in pediatric subjects with OCD compared with the controls. These between-group differences are present during both contamination and symmetry provocation experiments and during symptom provocation as well as viewing neutral pictures. The direction of activity is in contrast to adult findings in the insula and in components of cortico-striatal-thalamic neural systems. Our findings suggest developmental effects on neural systems underlying symptom dimensions in pediatric OCD.

Paediatric obsessive-compulsive disorder, a neurodevelopmental disorder? Evidence from neuroimaging

OBJECTIVE

To present an overview of neuroimaging data on paediatric obsessive-compulsive disorder (OCD) and discuss implications for further research.

METHOD

Medline PsycINFO databases and reference lists were searched for relevant articles. All neuroimaging studies up to October 1, 2008 involving children and adolescents with obsessive-compulsive disorder were included.

RESULTS

Twenty-eight neuroimaging studies using various neuroimaging techniques (CT (2) MRI (15) MRS (8) and SPECT (2) fMRI (2) but no PET or DTI) including a total of 462 paediatric patients were identified. A number of findings indicate a dysfunction of the prefrontal-striatal-thalamic circuit with the involvement of other basal ganglia structures (putamen globus pallidus) and the thalamus in contrast to adult studies which report mainly involvement of the caudate nucleus and orbitofrontal cortex. Several findings point at an aberrant development of the brain in paediatric OCD, patients when compared with healthy controls.

CONCLUSION

Neuroimaging studies have contributed to our understanding of the neurobiological basis of paediatric OCD. This review provides an agenda for further theory driven research in particular aimed at identifying a critical window of abnormal maturation of prefrontal-striatal-thalamic and limbic circuitry in paediatric OCD patients.

Meta-analysis of the symptom structure of obsessive-compulsive disorder

OBJECTIVE

OCD is a clinically heterogeneous condition. This heterogeneity has the potential to reduce power in genetic, neuroimaging, and clinical trials. Despite a mounting number of studies, there remains debate regarding the exact factor structure of OCD symptoms. The authors conducted a meta-analysis to determine the factor structure of the Yale-Brown Obsessive Compulsive Scale Symptom Checklist.

METHOD

Studies were included if they involved subjects with OCD and included an exploratory factor analysis of the 13 Yale-Brown Obsessive Compulsive Scale Symptom Checklist categories or the items therein. A varimax-rotation was conducted in SAS 9.1 using the PROC FACTOR CORR to extract factors from sample-size weighted co-occurrence matrices. Stratified meta-analysis was conducted to determine the factor structure of OCD in studies involving children and adults separately.

RESULTS

Twenty-one studies involving 5,124 participants were included. The four factors generated were 1) symmetry: symmetry obsessions and repeating, ordering, and counting compulsions; 2) forbidden thoughts: aggression, sexual, religious, and somatic obsessions and checking compulsions, 3) cleaning: cleaning and contamination, and 4) hoarding: hoarding obsessions and compulsions. Factor analysis of studies including adults yielded an identical factor structure compared to the overall meta-analysis. Factor analysis of child-only studies differed in that checking loaded highest on the symmetry factor and somatic obsessions, on the cleaning factor.

CONCLUSIONS

A four-factor structure explained a large proportion of the heterogeneity in the clinical symptoms of OCD. Further item-level factor analyses are needed to determine the appropriate placement of miscellaneous somatic and checking OCD symptoms.

Neurobiology and treatment of compulsive hoarding

Compulsive hoarding is a common and often disabling neuropsychiatric disorder. This article reviews the phenomenology, etiology, neurobiology, and treatment of compulsive hoarding. Compulsive hoarding is part of a discrete clinical syndrome that includes difficulty discarding, urges to save, clutter, excessive acquisition, indecisiveness, perfectionism, procrastination, disorganization, and avoidance. Epidemiological and taxometric studies indicate that compulsive hoarding is a separate but related obsessive-compulsive spectrum disorder that is frequently comorbid with obsessive-compulsive disorder (OCD). Compulsive hoarding is a genetically discrete, strongly heritable phenotype. Neuroimaging and neuropsychological studies indicate that compulsive hoarding is neurobiologically distinct from OCD and implicate dysfunction of the anterior cingulate cortex and other ventral and medial prefrontal cortical areas that mediate decision-making, attention, and emotional regulation. Effective treatments for compulsive hoarding include pharmacotherapy and cognitive-behavioral therapy. More research will be required to determine the etiology and pathophysiology of compulsive hoarding, and to develop better treatments for this disorder.