In the CAS group , recurrent stroke or transient ischemic attack occurred more often among DWI + patients ( @ of @ ) than among DWI - patients ( @ of @ ) , with a cumulative @-year incidence of @ % ( standard error -LSB- SE -RSB- : @ % ) and @ % ( SE : @ % ) , respectively ( unadjusted hazard ratio : @ ; @ % confidence interval : @ to @ ; p = @ ) .