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Table 3 Sensitivity, Specificity, and Predictive Value of ROC area of the HRV indices to assess the presence of CAD

From: Sensitivity, specificity and predictive values of linear and nonlinear indices of heart rate variability in stable angina patients

Variable/Cutoff Sens Sp PPV NPV Area under ROC curve p Odds Ratio (IC 95%)
HF ≤ 65 (ms 2 ) 58% 81% 49% 39% 0.708 0.0037 5.90 (1.7-20.53)
RMSSD ≤ 24.55 (ms) 70% 67% 81% 52% 0.667 0.0076 4.62 (1.51-14.1)
NN50 ≤ 15.54 (count) 51% 81% 85% 45% 0.653 0.0164 4.45 (1.16-20.7)
-ApEn ≤ 0.296 40% 90% 89% 42% 0.666 0.0188 6.21 (1.28-30.17)
  1. Sens = sensitivity, Sp = specificity, PPV = positive predictive value, NPV = negative predictive value.