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Phenotypic differences in early- and late-onset obsessive-compulsive disorder
C Sobin1, M L Blundell, M Karayiorgou
1Laboratory of Human Neurogenetics, The Rockefeller University, New York, NY 10021, USA.
Insights
Early-onset obsessive-compulsive disorder (OCD) presents distinct characteristics compared to later-onset OCD. Understanding these differences is crucial for targeted research and treatment strategies in pediatric and adult populations.
Area of Science:
- Neuroscience
- Psychiatry
- Genetics
Background:
- Genetic anomalies are often linked to early-onset diseases.
- Onset age may serve as a potential marker for obsessive-compulsive disorder (OCD) phenotypes.
- Previous research suggests variations in clinical presentation based on age of onset.
Purpose of the Study:
- To compare phenotypic characteristics between early- and late-onset obsessive-compulsive disorder (OCD).
- To assess the potential of onset age as a marker for distinct OCD subtypes.
- To investigate differences in symptom presentation, course, and associated conditions.
Main Methods:
- Study included 38 children with DSM-IV OCD and 129 adults (77 early-onset, 52 late-onset).
- DSM-IV diagnoses were confirmed using an amended Diagnostic Interview for Genetic Studies (DIGS).
- Phenotypic characteristics were compared between early- and late-onset adult OCD patients.
Main Results:
- Children with OCD showed earlier onset of non-impairing symptoms and diagnosis, higher rates of learning disabilities, and fewer obsessions/compulsions than adults with childhood onset.
- Early-onset OCD in adults was characterized by non-impairing symptom onset before puberty, a more aggressive course, and more obsessions/compulsions.
- Late-onset OCD in adults featured non-impairing symptom onset during puberty, a static course, and fewer, variably related obsessions/compulsions.
Conclusions:
- Children with OCD and adults with childhood-onset OCD exhibit distinct clinical characteristics and should be studied separately.
- Early- and late-onset OCD forms possess unique phenotypic features with potential neurobiological and genetic implications.
- Onset age is a significant factor differentiating OCD presentations and warrants further investigation.
Abstract:
Early-onset forms of many medical diseases have been associated with specific genetic anomalies. To assess the potential marker value of onset age in obsessive-compulsive disorder (OCD), we examined and compared the phenotypic characteristics of patients with early and later onset. The study sample included 38 children with DSM-IV OCD and 129 adults 19 years of age or older, 77 of whom reported OCD onset prior to age 18 and 52 of whom reported OCD onset at 18 years of age or older. DSM-IV diagnoses were ascertained for all subjects using an amended version of the Diagnostic Interview for Genetic Studies (DIGS). An initial comparison of children and adults with childhood onset revealed several differences, including an earlier onset of clinically significant symptoms without impairment and earlier onset of DSM-IV OCD, a higher frequency of learning disabilities, and fewer obsessions and compulsions among our child patients. For this reason, subsequent analyses included only adult patients with early and later OCD onset. Nonimpairing symptom onset prior to puberty, a relatively aggressive course, and a greater number of obsessions and compulsions unrelated to the amount of time in illness characterized early-onset OCD. Later-onset OCD was characterized by nonimpairing symptom onset during puberty, a static course, and relatively few obsessions and compulsions that were variably related to the amount of time in illness. We conclude that children with OCD and adults with childhood onset differ in their report of clinical characteristics and should be analyzed separately in studies concerning the phenotypic characteristics of OCD. Early- and late-onset forms of OCD appear to be characterized by phenotypic features that have important neurobiologic and perhaps genetic implications.