Among patients with heightened preoperative anxiety , there were no significant differences found in the EVAN-G mean global index between the lorazepam group ( 68 [ 95 % CI , 65-72 ] ; n = 87 ) and the no premedication group ( 73 [ 95 % CI , 69-77 ] ; n = 57 ) or the placebo group ( 70 [ 95 % CI , 67-72 ] ; n = 87 ) ( P = .18 ) .