Block success rates were similar ( AC group , 41/49 [ 84 % ] vs Peri-SBDGA group , 34/42 [ 81 % ] ; P = 0.79 ) , as were median [ interquartile range ] onset times ( AC group , 5 [ 5-10 ] min vs Peri-SBDGA group , 8 [ 5-11 ] min ; P = 0.38 ) .