Static incisional pain was significantly relieved at 0 hour , 2 hours , and 24 hours postoperatively ( 3.1 1.7 vs. 1.6 1.3 , P = 0.001 ; 1.4 1.3 vs. 0.5 0.8 , P = 0.012 ; and 2.3 1.9 vs. 1.0 1.5 , P = 0.038 , respectively ) .