There was also no difference in pain with cervical dilation ( 41.6 vs. 45.4 , p = 0.48 ) or postoperative pain ( 22.3 vs. 15.0 p = .076 ) , though patients in the ketorolac group experienced significantly greater arm pain than those who received a placebo injection ( 30.4 vs. 15.6 , p < .001 ) .