In the intention-to-treat cohort with multiple imputation for missing data , RYGB participants had the greatest mean weight loss from baseline ( 27.0 % ; 95 % CI , 30.8-23 .3 ) compared with LAGB ( 17.3 % ; 95 % CI , 21.1-13 .5 ) and LWLI ( 10.2 % ; 95 % CI , 14.8-5 .61 ) ( P < .001 ) .