Factors contributing to susceptibility of postmenopausal women to recurrent urinary tract infections.

Recurrent urinary tract infections (UTIs) account for substantial morbidity, losses in work time, and medical costs. Recent studies suggest that the major factors predisposing to recurrent UTIs differ by age and functional status. In premenopausal women, sexual intercourse, spermicide exposure, maternal history of UTI, and a history of UTI in childhood have been associated with recurrent infections. In postmenopausal women, lack of estrogen appears to be an important factor predisposing to recurrent UTI, as does nonsecretor status, a history of UTI in the premenopausal period, incontinence, presence of a cystocele, and postvoid residual urine. In older women who are institutionalized, catheterization, incontinence, antimicrobial exposure, and functional status are most strongly related to risk of recurrent UTI. Further research is needed to better identify measures for prevention of recurrent UTI, which likely differ by age group.