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Table 4 Partial correlation of predictors of absolute and relative bias (relative bias: CItd-CIpc/CItd)* (all data)

From: Predictors of the accuracy of pulse-contour cardiac index and suggestion of a calibration-index: a prospective evaluation and validation study

Parameter

Correlation to “absolute bias” (coefficient of partial correlation)

Correlation to “relative bias” (coefficient of partial correlation)

Collective

Evaluation

Validation

Merged

Evaluation

Validation

Merged

Intervall

−0.090 (p = 0.536)

0.083 (p = 0.605)

0.076 (p = 0.363)

−0.014 (p = 0.997)

0.083 (p = 0.597)

0.039 (p = 0.836)

CIpc

−0.367 (p < 0.001)

−0.573 (p < 0.001)

−0.466 (p < 0.001)

−0.355 (p < 0.001)

−0.529 (p < 0.001)

−0.422 (p < 0.001)

CIpc-CItd(base) [abs]

−0.592 (p < 0.001)

−0.630 (p < 0.001)

−0.606 (p < 0.001)

−0.529 (p < 0.001)

−0.577 (p < 0.001)

−0.547 (p < 0.001)

CIpc-CItd(base) [rel]

−0.564 (p < 0.001)

−0.632 (p < 0.001)

−0.574 (p < 0.001)

−0.570 (p < 0.001)

−0.612 (p < 0.001)

−0.583 (p < 0.001)

Delta-dPmax [abs]

−0.279 (p < 0.001)

−0.115 (p = 0.325)

−0.170 (p = 0.001)

−0.240 (p = 0.001)

−0.136 (p = 0.173)

−0.168 (p = 0.001)

Delta-dPmax [rel]

−0.286 (p < 0.001)

−0.091 (p = 0.533)

−0.162 (p = 0.002)

−0.255 (p < 0.001)

−0.110 (p = 0.353)

−0.166 (p = 0.002)

Delta-MAP [abs]

−0.257 (p < 0.001)

−0.114 (p = 0.324)

−0.179 (p = 0.001)

−0.224 (p = 0.003)

−0.137 (p = 0.164)

−0.180 (p < 0.001)

Delta-MAP [rel]

−0.243 (p = 0.001)

−0.119 (p = 0.286)

−0.165 (p = 0.002)

−0.196 (p = 0.015)

−0.157 (p = 0.080)

−0.162 (p = 0.002)

Delta-PP [abs]§

−0.356 (p < 0.001)

−0.188 (p = 0.023)

−0.260 (p < 0.001)

−0.323 (p < 0.001)

−0.222 (p = 0.004)

−0.262 (p < 0.001)

Delta-PP [rel]

−0.336 (p < 0.001)

−0.179 (p = 0.036)

−0.239 (p < 0.001)

−0.309 (p < 0.001)

−0.202 (p = 0.011)

−0.243 (p < 0.001)

Delta-RRsyst [abs]

−0.321 (p < 0.001)

−0.155 (p = 0.093)

−0.227 (p < 0.001)

−0.284 (p < 0.001)

−0.205 (p = 0.009)

−0.233 (p < 0.001)

Delta-RRsyst [rel]

−0.320 (p < 0.001)

−0.151 (p = 0.106)

−0.223 (p < 0.001)

−0.278 (p < 0.001)

−0.197 (p = 0.013)

−0.226 (p < 0.001)

Delta-RRdiast [abs]

−0.148 (p = 0.116)

−0.085 (p = 0.587)

−0.090 (p = 0.214)

−0.125 (p = 0.238)

−0.096 (p = 0.476)

−0.096 (p = 0.162)

Delta-RRdiast [rel]

−0.182 (p = 0.029)

−0.089 (p = 0.549)

−0.114 (p = 0.068)

−0.173 (p = 0.044)

−0.102 (p = 0.420)

−0.118 (p = 0.051)

  1. *CItd: Thermodilution-derived Cardiac Index; CIpc: Pulse-contour-derived Cardiac Index.
  2. CIpc-CItd(base): Cardiac index measured at previous (baseline) thermodilution.
  3. dPmax: “Index of Left Ventricular Contractility”.
  4. §PP: Pulse pressure.
  5. [rel]: relative changes compared to time of the last thermodilution.
  6. [abs]: absolute changes compared to time of the last thermodilution.