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Table 4 ROC analysis of the TTFM

From: Transit time flow measurement predicts graft patency in off-pump coronary artery bypass grafting upon 5-year angiographic follow-up

Variables

Cut-off

AUC

95% CI

P-value

Sensitivity

Specificity

LIMA

      

MGF

14.5

0.875

0.789–0.961

 < 0.001

0.896

0.800

PI

3.45

0.725

0.536–0.914

0.017

0.917

0.600

DF

57.5

0.560

0.357–0.762

0.525

0.984

0.300

DIAG

      

MGF

14.5

0.921

0.857–0.985

 < 0.001

0.968

0.750

PI

2.45

0.633

0.495–0.772

0.056

0.698

0.625

DF

60.5

0.484

0.325–0.642

0.816

0.937

0.292

OM

      

MGF

14.5

0.935

0.876–0.993

 < 0.001

1

0.769

PI

2.85

0.751

0.628–0.873

 < 0.001

0.795

0.692

DF

60.5

0.737

0.621–0.853

 < 0.001

0.877

0.500

PDA

      

MGF

13.5

0.956

0.911–1

 < 0.001

0.926

0.931

PI

2.65

0.755

0.651–0.858

 < 0.001

0.735

0.690

DF

67.5

0.689

0.576–0.802

0.003

0.456

0.828

PLA

      

MGF

16.5

0.905

0.794–1

 < 0.001

0.952

0.700

PI

1.85

0.690

0.495–0.886

0.091

0.524

0.900

DF

60.5

0.545

0.287–0.803

0.688

0.810

0.500

  1. The ROC analysis representing the cut-off graft flow for predicting 5-year Follow-up graft failure
  2. ROC, receiver operating characteristic; LIMA, left internal mammary artery; SVG, saphenous vein graft; MGF, mean graft flow; PI, pulsatile index; DF, diastolic filtration; AUC, area under curve; CI, confidence interval