Test-retest reliability of the Overactive Bladder Symptom Score and its correlation with other overactive bladder symptom evaluation tools among Chinese overactive bladder symptom patients

Objective To assess the test-retest reliability of the Chinese version of Overactive Bladder Symptom Score （OABSS） and its correlation with other overactive bladder symptom {OAB） evaluation tools among Chinese OAB patients. Methods Fifty OAB patients completed the OABSS, PPBC, IPSS forms and a three-day voiding diary card for twice in day 0 and day 14± 2, respectively. Test-retest reliability was examined using internal correlation coefficient （ICC） and weighted Kappa coefficients between first and second application of OABSS. The internal reliability was evaluated using Cronbach＇s α coefficient method. Pearson or/and Spearman correlation coefficients were calculated for testing the correlation between OABSS and IPSS, IPSS QOL, PPBC as well as clinical variables in the three-day voiding diary cards. Results ICC of OABSS total score was 0. 9172, weighted Kap pa coefficients of individual scores in OABSS were 0. 5902--0. 9274; Cronbach＇s α coefficients were 0. 3069 and 0. 3285, respectively. In the first and second application of OABSS, the Pearson correlation coefficients were 0. 2643--0. 6900 between OABSS and clinical variables in the three-day voiding diary card （except for average daily frequency of urination） ; the Pearson correlation coefficients were 0. 4734 and 0. 4929, and the Spearman correlation coefficients were 0. 4133 and 0. 4149 between OABSS and IPSS total score; the Spearman correlation coefficients were 0. 4083 and 0. 4127 between OABSS and PPBC. Conclusions The Chinese version of OABSS manifest test-retest reliability among Chinese OAB patients. It has also a high correlation with IPSS total score, PPBC and clinical variables in the three day voiding diary cards. Key words: Overactive bladder;  Overactive Bladder Symptom Score;  Patient Derception of Bladder Condition;  International Prostatic Scoring System;  Test-retest reliability