The primary comparison of VAS scores following the first intervention demonstrated that classic acupoint group was more effective both than unrelated acupoint ( -4.0 mm , 95 % CI -7.1 to -0.9 , P = 0.010 ) and nonacupoint ( -4.0 mm , 95 % CI -7.0 to -0.9 , P = 0.012 ) groups .