At the end of the study , ANOVA showed that OMT significantly reduced HIT-@ score ( mean change scores OMT-conventional care : -@ ; @ % confidence interval ( CI ) -@ to -@ ; p < @ and OMT-sham : -@ ; @ % CI -@ to -@ ; p < @ ) , drug consumption ( OMT-sham : RR = @ , @ % CI @-@ @ ; OMT-control : RR = @ , @ % CI @-@ @ ) , days of migraine ( OMT-conventional care : M = -@ ; @ % CI -@ to -@ ; p < @ and OMT-sham : -@ ; @ % CI -@ to -@ ; p < @ ) , pain intensity ( OMT-sham : RR = @ , @ % CI @-@ @ ; OMT-control : RR = @ , @ % CI @-@ @ ) and functional disability ( p < @ ) .