Objective        To understand clinical features of urinary incontinence (UI) with impaired awareness (IA) of the need to void in patients after stroke.       Methods        Prospective study was carried out in 225 consecutive patients with acute stroke hospitalized in our department during August 2007 to December 2008. Their micturition events and micturition awareness were assessed

and brain CT/MRI scanning was performed. Urodynamic determination was finished in 9 patients with UI. Survival and micturition status of the patients with UI were traced during the 6-month follow-up.       Results        There were 32 urge UI and 57 IA-UI in the 89 identified UI. The patients with IA-UI had lower micturition desire （P0.01）

lower sensation of bladder filling before leakage （P0.01） and lower awareness of leakage（P0.05）

more advanced age（P0.05）

more parietal lobe involvement（P0.05）

more total or partial anterior circulation syndrome（P0.01）

less scores of BI（P0.01） and less scores of recognition（P0.01）than those with urge UI. The urodynamic determination showed low urethral pressure during the entire procedure or detrusor over-activity. Bladder sensation was reduced or absent at the same time. The numbers of survival patients with IA-UI and patients with urinary continence were lesser than those with urge UI after 6 months（P0.01）.       Conclusion       The IA-UI after stroke might characterize as advanced age

disorder of micturition awareness

greater brain damage in anterior circulation

various urodynamic patterns and poor outcome.