Statistically significant differences were found in the incidence rate of urinary tract infection between the control and trial groups ( @ % -LSB- @/@ -RSB- vs @ % -LSB- @/@ -RSB- , P < @ ) , as well as in those with diabetes mellitus ( @ % -LSB- @/@ -RSB- vs @ % -LSB- @/@ -RSB- , P < @ ) , those with residual urine > @ ml ( @ % -LSB- @/@ -RSB- vs @ % -LSB- @/@ -RSB- , P < @ ) , and those with both diabetes mellitus and residual urine ( @ % -LSB- @/@ -RSB- vs @ % -LSB- @/@ -RSB- , P < @ ) .