Table 3 Primary analysis and subgroup analysis by time, including mean differences between measurements, the standard deviation of the differences, the 95% Bland–Altman limits of agreement and percentage error
Measurements | No. | Mean difference (L/min/m2) | Standard deviation difference (L/min/m2) | 95% Bland–Altman limits (L/min/m2) | Percentage error (%) |
|---|---|---|---|---|---|
CW-VTI CI and PiCCO CIa | 52 | − 0.16 | 0.62 | (− 1.37, 1.05) | 43.5 |
PW-VTI CI and PiCCO CIa | 52 | − 0.54 | 0.51 | (− 1.53, 0.46) | 38.6 |
CW-VTI CI and PW-VTI CIb | 52 | 0.38 | 0.59 | (− 0.77, 1.52) | 46.0 |
Less than 15 minutes | |||||
CW-VTI CI and PiCCO CIa | 31 | − 0.21 | 0.71 | (− 1.60, 1.18) | 49.0 |
PW-VTI CI and PiCCO CIa | 31 | − 0.56 | 0.53 | (− 1.60, 0.48) | 39.1 |
CW-VTI CI and PW-VTI CIb | 31 | 0.35 | 0.66 | (− 0.95, 1.65) | 50.7 |
Greater than 15 min | |||||
CW-VTI CI and PiCCO CIa | 21 | − 0.08 | 0.46 | (− 0.99, 0.82) | 33.2 |
PW-VTI CI and PiCCO CIa | 21 | − 0.50 | 0.48 | (− 1.44, 0.44) | 37.6 |
CW-VTI CI and PW-VTI CIb | 21 | 0.42 | 0.46 | (− 0.49, 1.32) | 36.6 |