To determine the efficacy of dried cranberry on reducing symptoms of overactive bladder in women.
Eligible women aged 18 or older with overactive bladder were randomized to either daily dried cranberry powder (500mg) or placebo (500mg) and followed for 24-weeks. Efficacy was measured by 3-day voiding diaries and Overactive Bladder Questionnaire Short Form, Patient Perception of Bladder Condition, Sexual Quality of Life-Female, and Pelvic Floor Distress Inventory surveys. Statistical analyses were performed by BIOFORTIS using SAS® software version 9.4.
Of the 98 women who were randomized, 77 completed all the visits, and 60 were included in the per protocol analysis. Compared to placebo, using per-protocol analysis, the cranberry group showed a significant reduction of daily micturitions (-1.91, 95%CI: -3.74, -0.88, P = 0.0406), urgency episodes (-2.81, 95%CI: -4.82, -0.80, P = 0.0069), and Patient Perception of Bladder Condition scores (-0.66, 95%CI: -1.23, 0.08, P = 0.0258) at 24-weeks of follow-up. Mean volume per micturition, nocturia, and the remaining survey outcomes did not differ significantly between the two groups (P > 0.05).
Daily intake of dried cranberry powder reduced daily micturition by 16.4%, urgency episodes by 57.3%, and patient perception of bladder condition by 39.7%. However, an intent-to-treat analysis showed no statistically significant difference between the groups for these measurements (p>0.05). Future larger studies with longer follow-up periods are needed to further determine the long-term effect of cranberry on overactive bladder.
The Journal of urology. 2020 Sep 18 [Epub ahead of print]
Ahra Cho, Andrew Eidelberg, Daniel J Butler, David Danko, Ebrahim Afshinnekoo, Christopher E Mason, Bilal Chughtai
Department of Urology, Weill Cornell Medical College-New York Presbyterian Hospital, New York., Tri-Institutional Computational Biol. & Medicine Program, Weill Cornell Medicine, New York.
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