Table 2

Bland–Altman analysis and linear regression analysis of changes in cardiac output

Bias (%)

Precision (%)

95% limits of agreement (%)

r²

ΔCO_TCP and ΔPulseCO

12

19

-26 to 50

0.38

ΔCO_TCP and ΔPCCO_pre

14

18

-22 to 51

0.32

ΔCO_TCP and ΔPCCO_recal

-1

5

-10 to 9

0.94

ΔCO_TCP and ΔCCO_PAC

2

14

-26 to 30

0.47

Bias (mean difference), precision (standard deviation of bias), 95% limits of agreement, and correlation coefficient (r²) between changes (Δ) of CO measured by ΔPulseCO, ΔPCCO_pre, ΔPCCO_recal and ΔCCO_PAC compared with ΔCO_TCP. CO_TCP, bolus transcardiopulmonary thermodilution cardiac output; PulseCO, continuous cardiac output by pulse power analysis; PCCO_pre, continuous cardiac output by pulse contour analysis before calibration; PCCO_recal, continuous cardiac output by pulse contour analysis after recalibration; CCO_PAC, continuous cardiac output by pulmonary artery catheter thermodilution.

Gruenewald et al. Critical Care 2008 12:R132   doi:10.1186/cc7102