Study links sexual behavior, genetic factors to increased risk of kidney infection in wome...( SEATTLEResearchers at Seattle-based Gro...)

Study links sexual behavior, genetic factors to increased risk of kidney infection in women under 50

SEATTLEResearchers at Seattle-based Group Health Cooperative and the University of Washington (UW) report that some of the same factors that put women at risk for simple, lower urinary tract infections (UTIs)as well as some unexpected factorsalso make them susceptible to more serious kidney infections.

Lead researcher Delia Scholes, PhD, senior investigator at Group Health Cooperatives Center for Health Studies and colleagues found that, like bladder infections, kidney infections in women under age 50 are linked to:

Frequent (more than three times per week) sexual intercourse in the previous 30 days

A recent urinary tract infection

A new sex partner in the previous year

Having a mother with a history of UTIs

Recent spermicide use

In addition, the researchers found a higher risk of kidney infection among women with a history of incontinence and diabetes. The study appears in the January 4 issue of the Annals of Internal Medicine.

The incontinence finding is still a bit of a puzzle, said Scholes. More research will be needed to understand the type of incontinence that is associated with kidney infections, as well as whether incontinence typically occurred before or after the kidney infection symptoms. The role of diabetes also warrants further study.

The study fills a gap in knowledge about a condition that affects more than 250,000 women in the United States each year. Most of what is known about kidney infections comes from studies of older, hospitalized patients. What the Group Health/UW study shows is that the great majority of these infectionsover 90 percentoccur in essentially healthy women who are treated on an outpatient basis.

The studys findings support the conventional view that kidney infections likely follow bladder infections and thus may help doctors identify patients at risk for kidney infections, so that they may be encouraged to follow advice for preventing lower UTIs.

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Contact: Joan DeClaire
declaire.j@ghc.org
206-287-2653
Group Health Cooperative Center for Health Studies
3-Jan-2005

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