The Inclusive Sexual Function Index (ISFI): Adaptation and Validation in a Sample Diverse Across Racial/Ethnic,...

Area of Science:

• Sexual health research
• Psychometrics
• Health equity

Background:

• Sexual function is integral to overall well-being across all identities.
• Existing measurement scales often lack inclusivity for marginalized communities.
• There is a critical need for validated tools assessing sexual function in diverse populations.

Purpose of the Study:

• To adapt the Female Sexual Function Index for broader applicability.
• To develop and validate an inclusive measure of sexual function.
• To ensure relevance for diverse racial/ethnic, gender, and sexual identities.

Main Methods:

• Adaptation of the Female Sexual Function Index.
• Validation in a racially diverse LGBTQIA+ sample (N=1,947).
• Assessment of internal consistency, convergent validity, and exploratory factor analysis (EFA).

Main Results:

• An 18-item Inclusive Sexual Function Index (ISFI) was established with reliability and validity.
• EFA revealed a five-factor structure: sexual interest, physical arousal, orgasm, sexual satisfaction, and pain/discomfort.
• The ISFI demonstrated psychometric soundness for diverse populations.

Conclusions:

• The Inclusive Sexual Function Index (ISFI) is a psychometrically sound tool.
• It accurately assesses core dimensions of sexual function in diverse individuals.
• The ISFI supports improved assessment and treatment of sexual health concerns in clinical and research settings.