In the dexamethasone/metoclopramide group , pain severity ( mean standard deviation ) was 7.4 1.4 ( p = 0.36 ) , 6.0 2.4 , and 2.5 2.9 ( p < 0.0001 ) at 20-min , 1-h , and 2-h intervals after treatment , respectively , with statistically significant differences between the baseline values and 1-h and 2-h interval values .