Successful resection occurred in 81.7 % of laparoscopic resection cases ( 95 % CI , 76.8 % -86.6 % ) and 86.9 % of open resection cases ( 95 % CI , 82.5 % -91.4 % ) and did not support noninferiority ( difference , -5.3 % ; 1-sided 95 % CI , -10.8 % to ; P for noninferiority = .41 ) .