Among patients with heightened preoperative anxiety , there were no significant differences found in the EVAN-G mean global index between the lorazepam group ( @ -LSB- @ % CI , @-@ -RSB- ; n = @ ) and the no premedication group ( @ -LSB- @ % CI , @-@ -RSB- ; n = @ ) or the placebo group ( @ -LSB- @ % CI , @-@ -RSB- ; n = @ ) ( P = @ ) .