At 6 weeks , there were no significant between-group differences in the RMDQ score ( adjusted difference in the average treatment effect between the glucocorticoid-lidocaine group and the lidocaine-alone group , -1.0 points ; 95 % confidence interval [ CI ] , -2.1 to 0.1 ; P = 0.07 ) or the intensity of leg pain ( adjusted difference in the average treatment effect , -0.2 points ; 95 % CI , -0.8 to 0.4 ; P = 0.48 ) .