Table 1

Inter technology agreements based on 20 values for each technology

NICOM vs. PICCO TD

PICCO PC vs. PICCO TD

NICOM vs. PICCO PC

Bias

0,26

0,04

0,22

R

0,76

0,77

0,55

RE

0,12

0,11

0,18

LOA

1,52

1,77

2,41

CV

0,31

0,38

0,49

C&C

0,93

0,93

0,80

Values of cardiac output obtained during positive end expiratory pressure were excluded from this analysis to minimize the impact of differences in time responsiveness between the devices.

R = coefficient of determination for inter-technologies comparisons; RE = averaged value of relative error (absolute bias/mean); LOA = limits of agreements of the Bland and Altman representation (two × standard deviations of the difference) in L/min; CV = coefficient of variation (two × standard deviation/mean); C&C = percentage of the differences inside the 30% limit of acceptability as suggested by Critchley and Critchley [16].

Squara et al. Critical Care 2009 13:R125   doi:10.1186/cc7981