Table 1.

Summary of the 54 distinct features extracted from each LBNP waveform. Supplementary Table S1 contains additional descriptions for each individual feature. Features calculated by subtracting the pressure value at the inflection point are referred to as “NODIA”.

Feature Types	Description	Number of Features
Individual Features	Features from the arterial waveform consist of standard waveform measurements (such as pulse pressure [PP] and peak-to-peak interval [PPI]).	7
Time Duration Features	Duration of certain phases of the arterial waveform (such as time from half-rise to inflection point [HRIP] and duration of the systolic phase [t_sys]).	6
Average Pressure Features	Average pressures of different arterial waveform phases.	5
Area Under the Curve Features	Area under the curve of different waveform phases.	5
Normalized Features	Area features normalized by the number of samples in the waveform and phases.	10
NODIA Features	Area under the curve and normalized features subtracted by the waveform value of the inflection point.	18
Slope Features	Average slope of different phases of the arterial waveform.	3