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Table 1 The diagnostic accuracies for PPL and/or API in detecting critical inflow stenosis

From: Measuring the palpable pulsatility length as a physical examination test in defining the severity of inflow stenosis for hemodialysis fistulas

  Sensitivity Specificity Positive predictive value Negative predictive value
PPL < 11 cm for critical inflow stenosis 83.3% 84.6% 71.4% 91.7%
API < 1.29 for critical inflow stenosis 100.0% 84.6% 75.0% 100.0%
PPL < 11 cm and API < 1.29 for critical inflow stenosis 83.3% 86.5% 74.1% 91.8%
PPL < 11 cm or API < 1.29 for critical inflow stenosis 100% 82.7% 72.7% 100%