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VAS-COG: Incontinence with Impaired Awareness Linked to Mortality Risk after Stroke


SAN ANTONIO -- Patients who had post-stroke urinary incontinence and were unaware of the urge to void had a significantly higher risk of mortality and nursing-home placement.

SAN ANTONIO, July 16 -- Patients who had post-stroke urinary incontinence and were unaware of the urge to void had a significantly higher risk of mortality and nursing-home placement.

Those patients were nearly 16 times more likely than continent patients or patients with simple urge incontinence to have died or been placed in a nursing home one year post-stroke (odds ratio 15.7; 95% confidence interval 3.6-69.7), according to results of a multivariate analysis presented at the International Society for Vascular Behavioral and Cognitive Disorders meeting here.

When mortality was removed from consideration, incontinence with impaired awareness and continuity of attention remained independent predictors of poorer outcome, according to Brian Saxby of CDR Ltd., a cognitive function testing firm in Goring, England.

"Patients with post-stroke urinary incontinence are less attentive compared with continent patients," said Saxby. "Those with urinary incontinence associated with impaired awareness perform the poorest [on tests of attention]. This should be taken more into account in the rehabilitation process."

Some evidence suggests that new onset post-stroke incontinence with impaired awareness, but not urge incontinence, predicts worse stroke outcomes, he said, including death and nursing-home confinement. Attention deficits also occur frequently after stroke and are associated with poorer outcome.

So Saxby and colleagues in Norway explored whether aspects of attention and mental processing affect the risk of post-stroke urinary incontinence at one year.

From a cohort of hospitalized stroke patients, the researchers identified 235 patients who remained incontinent and 75 who developed urinary incontinence within 10 days after their stroke. The incontinent group consisted of 27 patients with urge incontinence and 38 with incontinence and impaired awareness. The median age of the patients was 78. All were fully conscious, free of delirium, clinically stable, and free of sensory aphasia.

The patients underwent a battery of tests to assess functional and cognitive abilities before and after stroke. A subset of 110 patients also completed an automated assessment that provided the basis for composite scores related to power of attention, continuity of attention, and speed of memory. The subset consisted of 80 continent patients, 13 with urge urinary incontinence, and 17 with incontinence and impaired awareness.

As compared with the continent patients, both groups of incontinent patients had significant impairment in power of attention (P=0.008 to P

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