In the pretest and the 3 - , 6 - , and 12-month posttests , the median [ range ] duration of cricothyrotomy was respectively 117 s [ 70 to 184 ] , 69 s [ 43 to 97 ] , 52 s [ 43 to 76 ] , and 62 s [ 43 to 74 ] ( P < 0.0001 vs. in the pretest ) , the median [ range ] checklist score was 3 [ 0 to 7 ] , 10 [ 8 to 10 ] , 9 [ 6 to 10 ] , and 9 [ 4 to 10 ] ( P < 0.0001 vs. in the pretest ) and the median [ range ] global rating scale was 12 [ 7 to 22 ] , 30 [ 20 to 35 ] , 33 [ 23 to 35 ] , and 31 [ 18 to 33 ] ( P < 0.0001 vs. in the pretest ) .