Renal Doppler Resistive Index as a Marker of Oxygen Supply and Demand Mismatch in Postoperative Cardiac Surgery Patients
Table 3
Univariate and multivariate linear regression analysis of potential predictive hemodynamic parameters for renal Doppler resistive index.
Parameter
Univariate analysis
Multivariate analysis
Multivariate analysis
β
SE
β
SE
β
SE
Lactate
0.041
0.014
0.840
Not entered
PCP
−0.059
0.001
0.650
Not entered
CVP
0.082
0.002
0.531
Not entered
MAP
−0.167
0.001
0.199
Not entered
Heart rate
0.204
0.001
0.115
Not entered
Age
0.211
0.001
0.106
Not entered
0.179
0.001
0.110
VO2I
0.223
0.001
0.178
Not entered
SVRI
0.259
0.001
0.090
Not entered
DO2I
−0.277
0.001
0.079
Not entered
LVSWI
−0.321
0.001
0.036
Not entered
Cardiac index
−0.293
0.012
0.027
−0.226
0.010
0.039
−0.181
0.010
0.107
O2ER
0.581
0.114
<0.001
Not entered
SvO2
−0.604
0.001
<0.001
−0.555
0.001
<0.001
−0.573
0.001
<0.001
β: regression coefficient; SE: standard error. Variables excluded from the multivariate analysis because of the violation of assumption of no multicollinearity.
