TY - JOUR
T1 - Psychometric properties of the Swedish translation of the Obsessive–Compulsive Inventory-Revised and the population characteristics of the symptom dimensions of OCD
AU - Mahjani, Behrang
AU - Gustavsson Mahjani, Christina
AU - Reichenberg, Abraham
AU - Sandin, Sven
AU - Hultman, Christina M.
AU - Buxbaum, Joseph D.
AU - Grice, Dorothy E.
N1 - Funding Information:
This study was supported by a grant from the Beatrice and Samuel A. Seaver Foundation (DEG, JDB, BM); the Mindworks Charitable Lead Trust (DEG); the Stanley Center for Psychiatric Research (DEG); NIMH R01MH124679 (DEG).
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany.
PY - 2022/10
Y1 - 2022/10
N2 - Purpose: EGOS is an epidemiological obsessive–compulsive disorder (OCD) cohort in Sweden. Individuals contributed DNA for genotyping and sequencing and completed a Swedish translation of the Obsessive–Compulsive Inventory-Revised (OCI-R), a self-report questionnaire for assessing the severity of OCD. This study aimed first to evaluate the psychometric properties of the Swedish translation of the OCI-R and then shed light on the frequency, severity, and symptom dimensions of OCD comorbid with other psychiatric disorders. Methods: OCI-R data were available for 1010 individuals diagnosed with OCD, and 124 individuals diagnosed with chronic tic disorders without OCD used as a comparison group. We first performed a confirmatory factor analysis to confirm the six-factor structure of OCI-R. Then, we estimated Cronbach’s α coefficient and the generalizability coefficient to evaluate the internal consistency of the OCI-R. We linked the data from the Swedish national registries to access and analyze psychiatric comorbidities of OCD. Results: The Swedish translation of OCI-R demonstrated internal consistency and clear agreement with the OCI-R six-factor model. The mean total OCI-R score for females was significantly higher than for males. The most comorbid psychiatric condition to OCD were anxiety disorders (13.6%) and major depression (12%). Conclusion: The Swedish translation of OCI-R was a valid and reliable measure for assessing the severity of OCD. We observed that individuals with OCD frequently had additional comorbid psychiatric disorders and that the severity of OCD was significantly higher in individuals with at least one additional psychiatric comorbidity as compared to individuals with no psychiatric comorbidity.
AB - Purpose: EGOS is an epidemiological obsessive–compulsive disorder (OCD) cohort in Sweden. Individuals contributed DNA for genotyping and sequencing and completed a Swedish translation of the Obsessive–Compulsive Inventory-Revised (OCI-R), a self-report questionnaire for assessing the severity of OCD. This study aimed first to evaluate the psychometric properties of the Swedish translation of the OCI-R and then shed light on the frequency, severity, and symptom dimensions of OCD comorbid with other psychiatric disorders. Methods: OCI-R data were available for 1010 individuals diagnosed with OCD, and 124 individuals diagnosed with chronic tic disorders without OCD used as a comparison group. We first performed a confirmatory factor analysis to confirm the six-factor structure of OCI-R. Then, we estimated Cronbach’s α coefficient and the generalizability coefficient to evaluate the internal consistency of the OCI-R. We linked the data from the Swedish national registries to access and analyze psychiatric comorbidities of OCD. Results: The Swedish translation of OCI-R demonstrated internal consistency and clear agreement with the OCI-R six-factor model. The mean total OCI-R score for females was significantly higher than for males. The most comorbid psychiatric condition to OCD were anxiety disorders (13.6%) and major depression (12%). Conclusion: The Swedish translation of OCI-R was a valid and reliable measure for assessing the severity of OCD. We observed that individuals with OCD frequently had additional comorbid psychiatric disorders and that the severity of OCD was significantly higher in individuals with at least one additional psychiatric comorbidity as compared to individuals with no psychiatric comorbidity.
KW - Comorbidities
KW - Obsessive–compulsive inventory-revised
KW - Swedish translation
KW - Symptoms dimension
UR - http://www.scopus.com/inward/record.url?scp=85123494209&partnerID=8YFLogxK
U2 - 10.1007/s00127-022-02231-z
DO - 10.1007/s00127-022-02231-z
M3 - Article
AN - SCOPUS:85123494209
SN - 0933-7954
VL - 57
SP - 2147
EP - 2155
JO - Social Psychiatry and Psychiatric Epidemiology
JF - Social Psychiatry and Psychiatric Epidemiology
IS - 10
ER -