A Comparison of Third-Generation Semi-Invasive Arterial Waveform Analysis with Thermodilution in Patients Undergoing Coronary Surgery

Table 2

Bland-Altman analysis showing 95% limits of agreement, confidence interval, and percentage error before (T1) and after (T2) cardiopulmonary bypass and during passive leg raising before (PLR 1) and after (PLR 2) bypass.

	T1	T2	PLR 1	PLR 2
𝑛data/𝑛patient	𝑛=245/𝑛=50	𝑛=223/𝑛=50	𝑛=132/𝑛=47	𝑛=123/𝑛=42
	CIWave	CIWave	CIWave	CIWave
Mean (L/min/m^2)	2.38	2.78	2.26	2.76
Bias (L/min/m^2)	0.01	0.007	0.05	0.03
SD of bias (L/min/m^2)	0.37	0.35	0.34	0.34
CI of LOA (L/min/m^2)	0.17	0.16	0.10	0.11
95% limits of agreement (L/min/m^2)	−0.71 to +0.73	−0.69 to +0.68	−0.63 to +0.72	−0.69 to +0.63
Percentage error (%)	31	25	30	25

CI_Wave: cardiac index by semi-invasive pulse contour analysis; CI_TPTD: cardiac index by transpulmonary thermodilution; CI of LOA: confidence interval of the limits of agreement; PLR: passive leg raising.