Table 6.
Method comparisons between 12 GEM PREMIER 4000 analyzers (G1–G12) and between GEM PREMIER 4000 analyzers and those of the central laboratory (Lab). The comparisons between the GEM PREMIER 4000 analyzers were made on 30 samples. The comparisons between G1 and the central laboratory were made on 50 samples for Na+ and Cl-, 40 samples for K+ and lactate, and lastly on 30 samples for Ca2+.
|
pH |
pCO2 |
pO2 |
Na+ |
Cl- |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | |
| G1 vs. Lab | – | – | – | – | – | – | – | – | – | 0.98; 1.31 | 0.98 (1.545) | 1 (0.011) | 1.04; − 3.82 | − 0.54 (1.446) | 1 (0.014) |
| G2 vs. G1 | 1; − 0.07 | 0 (0.013) | 1 (0.002) | 1; 0.73 | − 0.07 (1.363) | 1 (0.022) | 1; − 0.03 | − 0.70 (3.042) | 1 (0.048) | 1.02; − 3.08 | 0.1 (0.885) | 1 (0.006) | 0.98; 2.65 | − 0.27 (1.112) | 1 (0.011) |
| G3 vs. G1 | 1; − 0.15 | − 0.01 (0.009) | 1 (0.001) | 1; 0.78 | 0.6 (1.850) | 1 (0.028) | 1; − 0.87 | 0.47 (2.897) | 1 (0.035) | 1.12; − 18.36 | 1.1 (1.185) | 1 (0.009) | – | – | – |
| G4 vs. G1 | 1; − 0.29 | − 0.01 (0.015) | 1 (0.002) | 1.1; − 3.28 | − 1.13 (3.730) | 1 (0.047) | 1; 0.88 | − 0.47 (4.313) | 1 (0.078) | 1.05; − 8.54 | 1.47 (1.306) | 1 (0.009) | – | – | – |
| G5 vs. G1 | 1; 0.08 | 0 (0.013) | 1 (0.002) | 1; 1.20 | 0.73 (1.999) | 1 (0.033) | 1; − 0.97 | 1.47 (3.655) | 1 (0.032) | 1.01; − 2.57 | 0.87 (1.502) | 1 (0.011) | – | – | – |
| G6 vs. G1 | 1; 0.02 | 0 (0.014) | 1 (0.002) | 1; − 0.37 | − 0.47 (2.713) | 1 (0.037) | 1; − 1.48 | 3.3 (3.650) | 1 (0.036) | 1.03; − 3.55 | 0 (1.050) | 1 (0.007) | – | – | – |
| G7 vs. G1 | 1; 0.14 | − 0.02 (0.010) | 1 (0.001) | 0.9; 2.18 | 1.9 (2.537) | 1 (0.040) | 1; − 2.36 | 0.77 (2.622) | 1 (0.031) | – | – | – | – | – | – |
| G8 vs. G1 | 1; 0.16 | 0 (0.012) | 1 (0.002) | 1; − 0.24 | − 0.47 (2.662) | 1 (0.035) | 1; − 0.63 | − 0.3 (4.268) | 1 (0.044) | 0.98; 2.33 | 0.57 (0.728) | 1 (0.005) | – | – | – |
| G9 vs. G1 | 1; − 0.02 | − 0.01; (0.017) | 1 (0.002) | 1; − 1.04 | 0.23 (1.675) | 1 (0.044) | 1; 0.96 | 0.61 (3.625) | 1 (0.030) | – | – | – | – | – | – |
| G10 vs. G1 | 1; 0.03 | − 0.02 (0.009) | 1 (0.001) | 1; − 2.45 | 0.83 (1.984) | 1 (0.032) | 1; 3.73 | − 1.2 (3.566) | 1 (0.032) | 1.01; − 2.90 | 1.73 (1.112) | 1 (0.008) | – | – | – |
| G11 vs. G1 | 1; 0 | − 0.01 (0.008) | 1 (0.001) | 1; − 1.69 | 1.43 (1.888) | 1 (0.031) | 1; − 1.44 | 1.17 (2.534) | 1 (0.030) | 1.02; − 4.58 | 2.3 (0.794) | 1 (0.006) | – | – | – |
| G12 vs. G11 | 1; − 0.05 | 0 (0.010) | 1 (0.001) | 1; 2.59 | − 0.37 (2.834) | 1 (0.033) | 1; − 2.68 | 1.37 (2.327) | 1 (0.034) | – | – | – | – | – | – |
|
K+ |
Ca2+ |
Lactate |
Hb |
O2Hb |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | LRE (a;b) | md (σ) | mr (σ) | |
| G1 vs. Lab | 1; − 0.17 | 0 (0.076) | 1 (0.019) | 0.9; 0.05 | 0.05 (0.045) | 1 (0.057) | 0.8; 0.20 | 0.29 (0.779) | 1 (0.226) | 1; − 0.1 | − 0.20 (0.663) | 1 (0.064) | – | – | – |
| G2 vs. G1 | 1; − 0.13 | 0 (0.069) | 1 (0.018) | 1; 0 | 0 (0.013) | 1 (0.015) | 1; − 0.06 | − 0.04 (0.177) | 1 (0.047) | 1.3; − 3.03 | − 0.14 (1.006) | 1 (0.084) | – | – | – |
| G3 vs. G1 | 1; 0 | 0 (0.053) | 1 (0.012) | 1; 0 | 0.01 (0.015) | 1 (0.015) | 0.9; 0.46 | 0.25 (0.693) | 1 (0.063) | 1; − 0.25 | 0 (0.175) | 1 (0.016) | 0.9; 5.84 | − 1.29 (0.783) | 1 (0.01) |
| G4 vs. G1 | 1; 0 | 0 (0.064) | 1 (0.017) | 1; 0 | 0.01 (0.019) | 1 (0.02) | 1; 0.01 | − 0.15 (0.193) | 1 (0.033) | 1; − 0.27 | 0.02 (0.376) | 1 (0.032) | 1; 1.89 | − 1.03 (3.077) | 1 (0.038) |
| G5 vs. G1 | 1; 0.01 | − 0.03 (0.061) | 1 (0.016) | 1; 0 | − 0.01 (0.022) | 1 (0.023) | 1; − 0.09 | 0.11 (0.181) | 1 (0.045) | 1; − 0.42 | 0.08 (0.227) | 1 (0.020) | 1.1; − 8.09 | − 0.94 (1.214) | 1 (0.014) |
| G6 vs. G1 | 1; 0 | 0 (0.059) | 1 (0.014) | – | – | – | – | – | – | 1; − 0.1 | 0 (0.211) | 1 (0.020) | 1; − 1.29 | − 0.68 (0.748) | 1 (0.008) |
| G7 vs. G1 | – | – | – | – | – | – | – | – | – | 1; − 0.13 | − 0.03 (0.151) | 1 (0.014) | 1; 0.23 | − 1.05 (0.466) | 1 (0.005) |
| G8 vs. G1 | 1; 0.19 | − 0.04 (0.077) | 1 (0.019) | – | – | – | 1; 0.06 | 0.01 (0.225) | 1 (0.047) | 1.1; − 0.90 | − 0.03 (0.415) | 1 (0.038) | 1; − 0.39 | − 0.68 (1.171) | 1 (0.015) |
| G9 vs. G1 | – | – | – | – | – | – | 0.9; 0.35 | − 0.04 (0.425) | 1 (0.073) | 1; − 0.05 | 0.11 (0.244) | 1 (0.025) | 0.95; 5.64 | − 1.20 (0.711) | 1 (0.008) |
| G10 vs. G1 | 1; 0.1 | 0.01 (0.052) | 1 (0.013) | 1; 0.02 | 0.01 (0.023) | 1 (0.022) | 1; − 0.07 | − 0.12 (0.174 | 1 (0.028) | 1; 0.10 | 0.33 (0.297) | 1 (0.035) | 1; 3.03 | − 1.71 (0.818) | 1 (0.01) |
| G11 vs. G1 | 1; 0.05 | 0.01 (0.061) | 1 (0.016) | 1; 0 | 0.02 (0.015) | 1 (0.016) | 1; − 0.22 | 0 (0.167) | 1 (0.025) | 1; − 0.26 | − 0.02 (0.157) | 1 (0.014) | 1; 4.57 | − 0.97 (0.507) | 1 (0.007) |
| G12 vs. G11 | – | – | – | – | – | – | 1; 0 | 0.13 (0.144) | 1 (0;027) | – | – | – | – | – | – |
LRE: Least rectangles equation. pH: hydrogen potential, pCO2: partial pressure of CO2, pO2: partial pressure of O2, Na+: sodium, K+: potassium, Cl-: chloride, Ca2+: calcium, Hb: hemoglobin, O2Hb: oxyhemoglobin. a: slope of allometric plot, b: intercept of allometric plot, md: mean of differences, mr: mean of ratios, σ: standard deviation.