
The systematic review analyzed urinary retention definitions in studies on botulinum toxin (BoNT) for idiopathic overactive bladder (iOAB) syndrome. Among 57 eligible studies, urinary retention rates ranged from 0% to 42.6%, with varying definitions across studies. Nearly half (42.1%) lacked a clear definition. Standardized criteria are essential to improve research consistency, clinical practice, and informed patient consent regarding catheterization risks post-BoNT injection.
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