title: Effect of baseline symptom severity on continence improvement mediated by oxybutynin chloride topical gel.
abstract: BACKGROUND
  In a recent placebo-controlled Phase III study, oxybutynin chloride topical gel (OTG) significantly improved urinary continence in patients with overactive bladder. In this post hoc analysis, the effect of incontinence severity on OTG-mediated improvement in continence was evaluated.
  
  
  METHODS
  Change from baseline in the number of incontinence episodes was evaluated in patients with two to three incontinence episodes/day (moderate incontinence) and those with more than three incontinence episodes/day (severe incontinence).
  
  
  RESULTS
  In patients with moderate (n = 171) and severe (n = 556) incontinence, reduction in incontinence episodes (mean ± standard deviation) was greater (P < 0.01) with OTG (moderate, -1.7 ± 1.4; severe, -3.6 ± 3.0) than with placebo (moderate, -1.2 ± 1.3; severe, -3.1 ± 3.4). Continence achievement rate with OTG was 48.2% (placebo, 24.4%) among patients with moderate incontinence and 17.8% (placebo, 12.1%) among those with severe incontinence.
  
  
  CONCLUSIONS
  Absolute placebo-adjusted reduction in incontinence episodes with OTG was not affected by baseline incontinence severity. Continence achievement was more likely if symptoms were less severe.
authors.affiliation: University of Chicago, Pritzker School of Medicine, Chicago, IL, USA.
authors.forename: Peter K
authors.initials: PK
authors.lastname: Sand
authors.forename: Scott A
authors.initials: SA
authors.lastname: Macdiarmid
authors.forename: Heather
authors.initials: H
authors.lastname: Thomas
authors.forename: Kim E
authors.initials: KE
authors.lastname: Caramelli
authors.forename: Gary
authors.initials: G
authors.lastname: Hoel
keywords: continence; incontinence; overactive bladder; oxybutynin chloride topical gel