Table 2.

Sensitivity and specificity of physical examination in the diagnosis of fistula stenosisa

DiagnosisTPFPFNTNSENSPEPPVNPVPREV
Inflow stenosis771514360.850.710.840.720.64
Outflow stenosis7987480.920.860.910.870.61
Coexisting inflow-outflow stenosis301416820.680.840.650.850.31
Central vein stenosis41281090.130.990.800.800.23
Body stenosis62091070.400.840.230.920.10
  • a FN, false negative; FP, false positive; NPV, negative predictive value; PPV, positive predictive value; PREV, prevalence of diagnosis by angiography; SEN, sensitivity; SPE, specificity; TN, true negative; TP, true positive.