Predictive validity of the Obsessive-Compulsive Inventory-4 and Florida Obsessive-Compulsive Inventory-II severity...

Area of Science:

• Psychiatry
• Clinical Psychology
• Mental Health Screening

Background:

• Early identification of obsessive-compulsive disorder (OCD) is vital for effective treatment.
• Screening tools must be efficient and accurate for clinical and research settings.
• Validating diagnostic tools in diverse populations is essential for global mental health.

Purpose of the Study:

• To evaluate the sensitivity and specificity of the Obsessive-Compulsive Inventory-4 (OCI-4) and the Florida Obsessive-Compulsive Inventory-II (FOCI-II) severity scale.
• To determine the optimal cut-off scores for both screening measures in a large, transnational sample.
• To compare the predictive performance of the OCI-4 and FOCI-II in identifying OCD.

Main Methods:

• A large transnational sample (N=1696) of Spanish-speaking Latin American adults with elevated obsessive-compulsive symptomatology was recruited.
• Participants completed self-report assessments (OCI-4, FOCI-II severity scale) and diagnostic interviews (MINI, Y-BOCS).
• Data were collected across 23 sites in 11 countries, ensuring a diverse and representative sample.

Main Results:

• Both the OCI-4 and FOCI-II significantly distinguished between OCD and non-OCD cases.
• The FOCI-II demonstrated superior predictive performance (AUC=.79) compared to the OCI-4 (AUC=.69).
• Optimal cut-off scores were identified as 7 or greater for both measures, with the FOCI-II showing higher sensitivity (74%) and specificity (70%) than the OCI-4 (64% sensitivity, 66% specificity).

Conclusions:

• Both the OCI-4 and FOCI-II are supported for use in clinical and research contexts for OCD screening.
• The FOCI-II offers comparative benefits in predictive performance for OCD identification.
• These findings support the utility of these screening tools in Spanish-speaking Latin American populations.