Quantitative Complexity Theory Used in the Prediction of Head-Up Tilt Testing Outcome
Table 3
Prognostic value of complexity, mean arterial pressure (MAP), and heart rate (HR) in the last 300 seconds before the termination of HUTT.
Time to HUTT_end (seconds)
Variable
AUC (95% CI)
300
Complexity (bits)
0.527 (0.393–0.661)
HR (bpm)
0.713 (0.591–0.834)0.026
MAP (mm Hg)
0.585 (0.452–0.718)
270
Complexity (bits)
0.576 (0.440–0.712)
HR (bpm)
0.632 (494–0.770)
MAP (mm Hg)
0.564 (0.429–0.698)
240
Complexity (bits)
0.683 (0.558–0.808)
HR (bpm)
0.713 (0.594–0.833)
MAP (mm Hg)
0.574 (0.441–0.707)
210
Complexity (bits)
0.566 (0.431–0.700)
HR (bpm)
0.583 (0.447–0.718)
MAP (mm Hg)
0.577 (0.448–0.706)
180
Complexity (bits)
0.673 (0.553)-0.793)
HR (bpm)
0.510 (0.377–0.644)
MAP (mm Hg)
0.573 (0.442–0.704)
150
Complexity (bits)
0.660 (0.539–0.781)
HR (bpm)
0.520 (0.386–0.655)
MAP (mm Hg)
0.578 (0.445–0.711)0.050
120
Complexity (bits)
0.747 (0.634–0.860)
HR (bpm)
0.504 (0.369–0.638)0.034
MAP (mm Hg)
0.578 (0.444–0.712)0.106
90
Complexity (bits)
0.736 (0.625–0,847)
HR (bpm)
0.535 (0.405–0.665)0.007
MAP (mm Hg)
0.572 (0.437–0.707)
60
Complexity (bits)
0.802 (0.707–0.897)
HR (bpm)
0.590 (0.465–0.716)0.015
MAP (mm Hg)
0.546 (0.414–0.677)0.003
30
Complexity (bits)
0.772 (0.660–0.883)
HR (bpm)
0.525 (0.398–0.652)0.014
MAP (mm Hg)
0.550 (0.417–0.683)0.030
Statistically significant intervariable difference (complexity vs HR/MAP); value was presented in superscript. AUC: area under curve, HR: heart rate, HUTT: head-up tilt test, MAP: mean arterial pressure.
