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Table 5 Diagnostic characteristics of basal Doppler findings’ cutoff points for the prediction of IUCD-induced heavy menstrual bleeding

From: Doppler ultrasound for prediction of IUCD-induced heavy menstrual bleeding: a prospective cohort study

  Uterine A. PI, cutoff ≤ 2.20 Uterine A. RI, cutoff ≤ 0.88 Sub-end. PI, cutoff ≤ 1.94 Sub-end. RI, cutoff ≤ 0.69 Sub-end. VI, cutoff ≥ 3.75
Sensitivity 88.1% 97.6% 88.1% 85.7% 97.6%
Specificity 60.3% 69.1% 36.8% 80.9% 82.4%
DA 70.9% 80.0% 56.4% 82.7% 88.2%
Youden’s index 48.4% 66.7% 24.9% 66.6% 80.0%
PPV 57.8% 66.1% 46.3% 73.5% 77.4%
NPV 89.1% 97.9% 83.3% 90.2% 98.2%
LR+ 2.22 3.16 1.39 4.48 5.53
LR− 0.20 0.03 0.32 0.18 0.03
LR 11.24 91.76 4.30 25.38 191.33
  Sub-end. FI, cutoff ≥ 3.20 Sub-end. VFI, cutoff ≥ 1.32 End. VI, cutoff ≥ 1.71 End. FI, cutoff ≥ 16.00 End. VFI, cutoff ≥ 0.18
Sensitivity 76.2% 97.6% 100.0% 97.6% 95.2%
Specificity 72.1% 75.0% 73.5% 26.5% 86.8%
DA 73.6% 83.6% 83.6% 53.6% 90.0%
Youden’s index 48.2% 72.6% 73.5% 24.1% 82.0%
PPV 62.7% 70.7% 70.0% 45.1% 81.6%
NPV 83.1% 98.1% 100.0% 94.7% 96.7%
LR+ 2.73 3.90 3.78 1.33 7.20
LR− 0.33 0.03 0.00 0.09 0.05
LR 8.25 123.00 > 100.0 14.76 131.11
  1. CI confidence interval, DA diagnostic accuracy, PPV positive predictive value, NPV negative predictive value, LR+ positive likelihood ratio, LR− negative likelihood ratio, LR diagnostic odds ratio