Compared with the control group , participants receiving the intervention showed significant reduction in urinary incontinence episodes per week with a mean difference of -6.4 ( 95 % confidence interval , -8.9 to -3.9 ; t = -5.3 ; P < 0.001 ) and significant improvement of quality of life with a mean difference of -3.93 ( 95 % confidence interval , -5.08 to -2.78 ; t = -6.9 ; P < 0.001 ) measured by Incontinence Impact Questionnaire Short Form modified Chinese ( Taiwan ) version .