At 8 weeks , 6 months , and 12 months , the median percent change from the baseline in UIE on the intention-to-treat analysis was greater for the MBSR group ( -55.6 , -71.4 , and -66.7 , respectively ) compared with that for the yoga group ( -33.3 , -11.8 , and -16.7 , respectively ) , with P values ranging from 0.01 to 0.08 .