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Table 3 Extubation predictability for the measured variables

From: Neuroventilatory efficiency and extubation readiness in critically ill patients

     Cut-off point    
  Time AUC P for analyzed Sensitivity Specificity Youden index
     variables    
  T1 0.750 0.004 24.170 0.686 0.706 0.392
  T5 0.842 <0.001 24.070 0.686 0.882 0.568
NVE T10 0.815 <0.001 20.120 0.743 0.765 0.508
(ml/µV) T15 0.818 <0.001 33.620 0.600 1.000 0.600
  T30 0.861 <0.001 25.670 0.714 0.929 0.643
  Tend 0.808 <0.001 22.210 0.771 0.824 0.595
  Mean 0.816   24.977 0.700 0.851 0.551
  T1 0.692 0.026 1.154 0.714 0.647 0.361
  T5 0.701 0.020 1.390 0.371 1.000 0.371
NME T10 0.716 0.026 1.180 0.615 0.786 0.401
(cm H2O/µV) T15 0.720 0.023 1.133 0.692 0.786 0.478
  T30 0.830 <0.001 0.879 0.914 0.667 0.581
  Tend 0.745 0.005 1.139 0.800 0.647 0.447
  Mean 0.734   1.146 0.684 0.756 0.440
  T1 0.659 0.065 10.098 0.882 0.457 0.339
  T5 0.726 0.009 17.050 0.647 0.714 0.361
EAdi T10 0.718 0.012 19.740 1.000 0.543 0.449
(µV) T15 0.718 0.013 9.655 1.000 0.486 0.486
  T30 0.780 0.002 14.400 0.786 0.743 0.529
  Tend 0.743 0.005 14.410 0.706 0.743 0.449
  Mean 0.724   14.226 0.837 0.614 0.436
  T1 0.681 0.036 88.660 0.588 0.800 0.388
  T5 0.718 0.012 80.570 0.647 0.857 0.504
f/Vt T10 0.676 0.042 89.030 0.529 0.800 0.329
(breaths/min)/L T15 0.714 0.015 72.790 0.688 0.771 0.459
  T30 0.716 0.019 64.540 0.786 0.629 0.415
  Tend 0.745 0.005 69.620 0.765 0.686 0.451
  Mean 0.708   77.535 0.667 0.757 0.424
  T1 0.708 0.016 226.000 0.914 0.529 0.443
  T5 0.713 0.013 293.000 0.886 0.588 0.474
Vt T10 0.718 0.011 308.000 0.829 0.529 0.358
(L) T15 0.745 0.005 302.000 0.943 0.626 0.569
  T30 0.740 0.009 302.000 0.829 0.571 0.400
  Tend 0.732 0.007 302.000 0.829 0.588 0.417
  Mean 0.726   288.833 0.872 0.572 0.444
  T1 0.645 0.106 6.714 0.893 0.471 0.364
  T5 0.654 0.074 6.960 0.829 0.529 0.358
VE T10 0.677 0.040 7.165 0.829 0.529 0.358
(L/min) T15 0.729 0.009 6.470 0.943 0.500 0.443
  T30 0.669 0.066 7.021 0.914 0.500 0.414
  Tend 0.682 0.034 7.020 0.914 0.529 0.443
  Mean 0.676   6.892 0.887 0.510 0.397
  T1 0.666 0.055 26.240 0.588 0.829 0.417
  T5 0.649 0.084 26.820 0.529 0.829 0.358
f T10 0.582 0.344 27.750 0.412 0.829 0.241
(breaths/min) T15 0.596 0.273 29.330 0.375 0.886 0.261
  T30 0.600 0.278 27.570 0.500 0.771 0.271
  Tend 0.618 0.169 27.560 0.529 0.800 0.329
  Mean 0.619   27.545 0.489 0.824 0.313