Combined data for men and women from all patient-care settings identify urinary tract infection (UTI) as the most common infection, and it is the second most common infection among non-institutionalised patients.[7] Forty percent of all nosocomial infections in men and women are UTIs; 80% of these develop secondary to indwelling catheters.[8] Men account for 20% of the overall occurrences of UTI, with an estimated lifetime prevalence of 13,689 per 100,000.[9] Ageing contributes to UTI occurrence in men.[10] UTIs rarely develop in men before 50 years of age.[9] Also, residence in a long-term care facility correlates with the likelihood of men developing bacteriuria and UTI.[10] The ratio of UTI occurrence between institutionalised women and men is almost equal (2 to 3:1), unlike the ratio for younger women and men (25:1).[11] In addition, up to 40% of institutionalised men have asymptomatic bacteriuria.[4][9][11]

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