RESULTS	Six of 344 ( 2 % , 95 % confidence interval : 0.7 , 4 % ) patients with ipsilateral stenosis < 50 % had a recurrent stroke by 7 days as compared with none of 50 patients ( 0 % , 95 % confidence interval : 0 , 9 % ) ( P = 0.73 ) with stenosis > or = 50 % .\