The VAS pain scores at each timepoint were significantly lower in the treatment group than those in the control group ( 1 h : 1.0 0.6 vs 1.8 0.6 , t = -1.650 , P = 0.000 ; 2 h : 1.3 0.6 vs 1.9 0.7 , t = -4.302 , P = 0.000 ; 4 h : 1.6 0.7 vs 2.7 1.2 , t = -4.752 , P = 0.000 ; 8 h : 2.5 1.4 vs 5.0 1.8 , t = -6.835 , P = 0.000 ; 12 h : 2.2 1.1 vs 3.3 1.5 , t = -3.902 , P = 0.000 ; 24 h : 1.6 0.8 vs 2.5 1.4 , t = -3.649 , P = 0.000 ; 36 h : 1.2 0.6 vs 2.2 0.8 , t = -6.390 , P = 0.000 ; 48 h : 1.0 0.5 vs 1.5 0.6 , t = -3.710 , P = 0.000 ) .