 Having sex more than once per week, a history of urinary tract infection (UTI),   treated diabetes mellitus, and incontinence place postmenopausal women at greater   risk for a UTI, according to a population-based, casecontrol study of   almost 2,000 healthy, community-dwelling women between the ages of 55 and 75. 

 Investigators point out that the risk factors for UTI in this population reflect   the health status of women as they transition toward old age. 

 is the most common infective   agent, causing up to 82% of UTIs in this population. Despite the findings of   some previous studies, oral estrogen replacement therapy did not reduce the   risk of UTI. 

 Hu KK, Boyko EJ, Scholes D, et al. Risk factors for urinary   tract infections in postmenopausal women. 