Psychometric Properties and Cutoff Value of the Turkish Overactive Bladder Symptom Score

The Overactive Bladder Symptom Score (OABSS) measures all overactive bladder (OAB) symptoms with graded answers, evaluates urgency symptoms, and reveals the subjective bladder control. However, the Turkish version and the cutoff value of the questionnaire have not yet been studied.

The aims of this study were to determine the psychometric properties of the 7-item OABSS and to estimate the cutoff value of the scale.

This was an observational study. The internal consistency (Cronbach α) and test-retest reliability were analyzed, and exploratory factor analysis was performed. For the criterion validity, the correlations between the OABSS, the Overactive Bladder Questionnaire, the Bristol Female Lower Urinary Tract Symptoms questionnaire, and outcomes of a bladder diary were used. The cutoff value of the OABSS was analyzed by the receiver operating characteristics curve analysis.

Participants with (n = 49) and without (n = 38) OAB were included. The internal consistency was very strong (Cronbach α = 0.95). The test-retest reliability was very strong (intraclass correlation coefficients = 0.93-0.95, P = 0.001). The percentage of explanation of the total variance was calculated as 78%. There was a strong to very strong correlation between the OABSS and the Overactive Bladder Questionnaire and Bristol Female Lower Urinary Tract Symptoms scores and outcomes of the bladder diary. The cutoff value for the OABSS was determined as 10.5.

The Turkish OABSS was found to be a valid and reliable scale to determine OAB symptoms and severity. Those who score more than 10.5 on the questionnaire can be considered as at risk of OAB syndrome.