Surgical space conditions during dissection of the gallbladder assessed by use of the numeric rating scale were 20 ( 10-50 ) ( median [ 25 % -75 % range ] ) in the deep neuromuscular blockade group and 30 ( 10-50 ) in the moderate group ( P = 0.58 ; Wilcoxon-Mann-Whitney odds , 1.2 ; 95 % confidence interval , 0.6-2 .5 ) .