Table 3

Bland-Altman analysis for FCO compared with ICO and PCO compared with ICO

FCO-ICO

PCO-ICO

Set A

Set B

Set A

Set B

L/minute

%Error

L/minute

%Error

L/minute

%Error

L/minute

%Error

Supine 1

-0.1 (1.6)

28.7

-0.3 (1.2)

20.7

-0.2 (1.4)

24.6

-0.3 (1.2)

20.7

Head-up

-0.3 (1.8)

36.0

-0.3 (1.1)

25.6

-0.1 (1.1)

22.0

0.1 (1.0)

23.3

Head-down

0.2 (2.2)

36.1

-0.2 (1.1)^a

22.0

-0.3 (1.6)

26.2

-0.4 (1.4)

28.0

Supine 2

0.0 (2.4)

42.8

-0.4 (1.0)^a

18.9

-0.2 (1.4)

25.0

-0.3 (1.3)

24.5

Total

-0.1 (2.1)

37.5

-0.3 (1.1)^a

21.6

-0.2 (1.4)

25.0

-0.2 (1.3)

25.5

FCO = cardiac output assessed by the FloTrac/Vigileo™ device; ICO = cardiac output determined by the intermittent thermodilution; PCO = cardiac output assessed by the PiCCOplus™ system. Data are presented as mean bias (limits of agreement). Percentage error (%Error) was calculated according to Critchley and Critchley [20]. ^a P < 0.05 compared with set A.

Senn et al. Critical Care 2009 13:R32   doi:10.1186/cc7739