Development of the Kinesiophobia Severity Scale in Urinary Incontinence: A Validity and Reliability Study

This methodological study aims to develop and evaluate the validity and reliability of the Kinesiophobia Severity Scale in Urinary Incontinence (KSS-UI), a novel Turkish-language self-report instrument designed to assess fear of movement and movement avoidance associated with concerns about urinary leakage.

The study will include individuals with urinary incontinence, including stress, urgency, and mixed urinary incontinence. Participants will be recruited exclusively from individuals reporting urinary incontinence among relatives of patients attending the Physical Therapy and Rehabilitation Center. Individuals who meet the eligibility criteria and voluntarily agree to participate will be enrolled in the study. Written informed consent will be obtained from all participants before data collection.

Initially, an item pool was developed through a comprehensive literature review, semi-structured interviews with 15-20 individuals with urinary incontinence, and recommendations from experts in relevant clinical disciplines. Following ethical approval, the items will undergo content validity assessment by a multidisciplinary panel of at least 10 experts. Item relevance, clarity, simplicity, and necessity will be evaluated using the Content Validity Ratio (CVR), Content Validity Index (CVI), and modified kappa statistics.

Subsequently, face validity and comprehensibility will be assessed through cognitive interviews with 8-12 individuals. Items will be revised based on participant feedback. Pilot testing will be conducted to examine item distributions, floor and ceiling effects, corrected item-total correlations, internal consistency, and item discrimination.

Following these preliminary evaluations, the revised scale will be administered to eligible participants during a single assessment session. Questionnaire completion is expected to take approximately 15-20 minutes.