Document Classification

Section Type: RESULTS

Text: The time to a first symptomatic episode was similar in the placebo group and the antimicrobial-therapy group (P = 0. 67 by the log-rank test), as were the (+ / - SD) rates of any symptomatic urinary tract infection (1. 10 + / -0. 17 and 0. 93 + / -0. 14 per 1000 days of follow-up, respectively ; relative risk, 1. 19 ; 95 percent confidence interval, 0. 28 to 1. 81), pyelonephritis (0. 28 + / -0. 08 and 0. 13 + / -0. 05 per 1000 days of follow-up ; relative risk, 2. 13 ; 95 percent confidence interval, 0. 81 to 5. 62), and hospitalization for urinary tract infection (0. 10 + / -0. 36 and 0. 06 + / -0. 22 per 1000 days of follow-up ; relative risk, 1. 93 ; 95 percent confidence interval, 0. 47 to 7. 89).