Reasons for treatment failure in the SRVPAa group and the topiramate group.

aDuring follow-up, three patients made a plan for pregnancy, and all of them were in the SRVPA group.bRR = Relative risk.cDefined as the patient discontinuing SRVPA or topiramate treatment on his or her own volition.dLE & IAEs = Lack of efficacy combined with intolerable adverse events.