Analyses will include comparisons of NRS , ODI and changes at the different visit times among the three groups by Repeated Measures Data ANOVA , an evaluation of reduced scores of NRS and ODI after the therapy to determine if they meet the minimum acceptable outcome ( MAO ) , and the determination of the minimal clinically important difference ( MCID ) by the average improvement in NRS and ODI scores of all participants who have been allocated to the category ` improved ' on the GPE assessment .