Test‐retest reliability of four questionnaires for patients with overactive bladder: The overactive bladder questionnaire (OAB‐q), patient perception of bladder condition (PPBC), urgency questionnaire (UQ), and the primary OAB symptom questionnaire (POSQ)

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Abstract
Aims This study examined test‐retest reliability of four patient‐reported outcome measures for patients with overactive bladder (OAB): Overactive Bladder Questionnaire (OAB‐q), Patient Perception of Bladder Condition (PPBC), Urgency Questionnaire (UQ), and Primary OAB Symptom Questionnaire (POSQ). Methods Patients recruited from urology clinics were scheduled for two visits 2 weeks apart and completed all questionnaires at both visits. A demographic form was completed at Visit 1; and a treatment effect scale was completed at Visit 2. Test‐retest reliability was examined among stable patients using intraclass correlations (ICC), Spearman's correlations, paired t‐tests, Feldt's statistic, and kappas. Results A total of 47 patients enrolled (mean age = 66.0 years, 74.5% female), with 46 completing both visits; 35 were classified stable. Statistically significant correlations were present between Visits 1 and 2 (P < 0.05) for all subscales of the OAB‐q, UQ, and POSQ. Subscale ICCs were moderate to high (OAB‐q ≥ 0.83, UQ ≥ 0.46, POSQ continuous items ≥ 0.68). No significant differences between Visit 1 and 2 were noted, except for the OAB‐q symptom bother scale (change of 5.8 points on a 100‐point scale). The multi‐item subscales of the OAB‐q and the UQ demonstrated good internal consistency (Cronbach's alpha ≥ 0.83 for all subscales) across both visits. Test‐retest reliability of the PPBC was somewhat weaker than the other three measures, but still acceptable for use as a global, single‐item outcome measure. Conclusions The OAB‐q, POSQ, and UQ demonstrated good test‐retest reliability, with ICCs roughly equivalent or superior to those previously reported for 7‐day micturition diaries. Findings suggest that the four measures examined in this study demonstrate the necessary reproducibility for use as outcome measures for OAB treatments.