[Bacteremic urinary infection in men: comparative study with bacteremic pyelonephritis in women]. / Infección urinaria bacteriémica en el varón. Estudio comparativo frente a la pielonefritis bacteriémica femenina.

OBJECTIVE: To compare the clinic and microbiologic characteristics of the extrahospitalary bacteremic urinary infections (EBUI) between men and women assisted in a 200 bed community hospital. PATIENTS AND METHODS: A prospective study of the EBUI diagnosed in our hospital from January 1991 to April 1994 was carried out. Quantitative variables were evaluated with t Student analysis, chi 2 was used for the comparation of proportions. The logistic regression step-by-step model was used in order to find out which variables influenced that the microorganism causing EBUI was Escherichia coli. RESULTS: 107 episodes of EBUI were recorded, 39 men and 68 women, with the same microorganism in blood and urine. Significative diferences in age (70 +/- 17 years in men, 58 +/- 24 years in women); the presence of urinary tract alterations (49% men vs 12% women) and in the presence of indwelling urinary catheter (26% men vs 3% female) were found. E. coli was responsible in a major proportion (p = 0.03) of the EBUI in women that in men, but only age > 65 was selected as explaining variable with the logistic regression model. CONCLUSIONS: The EBUI appears in old men with urinary tract alterations and/or manipulations, clearly different from the EBUI in women. Age greater than 65 years is the only predisponent factor of EBUI in men by bacteria other than E. coli.