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Register-based study of the incidence, comorbidities and demographics of obsessive-compulsive disorder in specialist healthcare

By Hanna Rintala, Roshan Chudal, Sami Leppämäki, Susanna Leivonen, Susanna Hinkka-Yli-Salomaki and Andre Sourander

Abstract

Background: Incidence of obsessive-compulsive disorder (OCD) has been suspected to increase but nationwide epidemiological studies are limited. This study aims to examine sex-specific incidence time trends and characterize psychiatric and neurodevelopmental comorbidities and sociodemographic risk factors of OCD in specialist healthcare in Finland. Methods: A nationwide register-based study using data from four Finnish registers identified 3372 OCD cases and 13,372 matched controls (1: 4). Cumulative incidence in subjects born between 1987 and 2001 was estimated at ages of 10, 15, 20 and 23 years. Conditional logistic regression was used to examine the sociodemographic factors. Results: The cumulative incidence of OCD was 0.4% by age 23. Incidence by age 15 among three cohorts increased from 12.4 to 23.7 /10000 live born males and 8.5 to 28.0 /10000 live born females. 73% of the sample had a comorbid condition. Males were significantly more comorbid with psychotic and developmental disorders; females were more comorbid with depressive and anxiety disorders (p <0.001). Higher maternal SES was associated with an increased risk of OCD (OR 1.4; 95% CI 1.1-1.6). Conclusions: These findings suggest that incidence of treated OCD in specialist healthcare has increased. The reason may be increased awareness and rate of referrals but a true increase cannot be ruled out. Further research on risk factors of OCD is warranted

Topics: Obsessive-compulsive disorder, Time trends of incidence, Comorbidity, Mental health services, Register-based study, AUTISM SPECTRUM DISORDERS, QUALITY-OF-LIFE, MENTAL-HEALTH, TREATMENT SEEKING, RISK-FACTORS, NEUROPSYCHIATRIC DISORDERS, FUNCTIONAL IMPAIRMENT, TOURETTE-SYNDROME, TIC DISORDERS, SERVICE USE, 3124 Neurology and psychiatry, Obsessive-compulsive disorder, Time trends of incidence, Comorbidity, Mental health services, Register-based study, AUTISM SPECTRUM DISORDERS, QUALITY-OF-LIFE, MENTAL-HEALTH, TREATMENT SEEKING, RISK-FACTORS, NEUROPSYCHIATRIC DISORDERS, FUNCTIONAL IMPAIRMENT, TOURETTE-SYNDROME, TIC DISORDERS, SERVICE USE, 3124 Neurology and psychiatry
Publisher: BioMed Central Ltd
Year: 2017
OAI identifier: oai:helda.helsinki.fi:10138/179369
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