Table 3.
Mean differences (MD) including p-values (p), standard deviations (SD) and Limits of Agreement (Upper Limit = MD+1,96SD; Lower Limit = MD-1,96SD) for arterial and capillary blood gasses.
| MD | SD | Upper limit | Lower limit | |
|---|---|---|---|---|
| PO2 (kPa) | 1.59 (p= 0.00) |
1.46 | 4.45 | −1.27 |
| PCO2 (kPa) | −0.13 (p= 0.00) |
0.26 | 0.38 | −0.64 |
| pH | 0.00 (p= 0.21) |
0.01 | 0.03 | −0.02 |
| BE | −0.40 (p= 0.00) |
0.48 | 0.55 | −1.35 |
| SO2 | 0.02 (p= 0.00) |
0.02 | 0.06 | −0.02 |
| HCO3− (mmol/l) | −0,25 (p= 0,00) |
0.41 | 0.55 | −1.06 |
| Lactate (mmol/l) | −0,28 (p= 0,00) |
0.25 | 0.20 | −0.77 |
Statistical analysis of Hgb concentrations showed an MD of −0.23 mmol/l and LoA of −0.77–0.31 mmol/l (p = 0.00, SD = 0.28). Bland-Altman plots of this result will not be presented.