Premedication with lorazepam did not improve the EVAN-G mean global index for overall level of patient satisfaction ( 72 [ 95 % CI , 70-73 ] ; n = 330 ) compared with no premedication ( 73 [ 95 % CI , 71-74 ] ; n = 319 ) or placebo ( 71 [ 95 % CI , 70-73 ] ; n = 322 ) ( P = .38 ) .