ROC analysis revealed an area under the curve for prediction of response to RDN by systolic time rate of 66.8 % ( 95 % CI : 46.7 % to 87 % ; p = 0.16 ) and by diastolic time rate of 76.1 % ( 95 % CI : 58.2 % to 93.9 % ; p = 0.030 ) .