Skip to main content
. 2024 Feb 21;42(6):1057–1065. doi: 10.1097/HJH.0000000000003696

TABLE 2.

Forward and backward wave amplitudesa

Forward wave amplitude B Beta P
R2 = 0.332
 Constant −39.364 <0.001
 Extracellular water volume 0.790 0.220 0.015
 Systemic vascular resistance 0.016 0.678 <0.001
 Stroke volume 0.226 0.523 <0.001
 Heart rate 0.302 0.391 <0.001
Change in forward wave amplitude B Beta P
R2 = 0.162
 Constant −0.686 0.256
 Change in systemic vascular resistance 0.008 0.380 <0.001
 Change in extracellular water volume 0.931 0.183 0.038
Backward wave amplitude B Beta P
R2 = 0.587
 Constant −1.661 0.729
 Forward wave amplitude 0.452 0.467 <0.001
 Systemic vascular resistance 0.006 0.266 <0.001
 Pulse wave velocity 1.183 0.278 <0.001
 Heart rate −0.159 −0.212 0.004
Change in backward wave amplitude B Beta P
R2 = 0.643
 Constant −0.008 0.984
 Change in forward wave amplitude 0.588 0.599 <0.001
 Change in heart rate −0.295 −0.427 <0.001
 Change in pulse wave velocity 1.470 0.252 <0.001
a

Linear regression analyses with stepwise elimination; pulse wave velocity, heart rate, stroke volume, systemic vascular resistance, and extracellular water volume included as potential explanatory factors for FWA; in addition, FWA was included as a potential explanatory for BWA. The changes in the above variables were tested as potential explanatory factors for the changes in FWA and BWA. B, unstandardized coefficient; Beta, standardized coefficient.