Table 3 Performance metrics of models predicting days on ventilator using pCXR alone, non-imaging data alone and their combination
| Â | Â | Slope | Intercept | R2 | p | MAE |
|---|---|---|---|---|---|---|
Day 1 | CXR | 0.19 (0.08) | 8.5 (1.1) | 0.18 (0.09) | 0.059 | 5.30 (0.42) |
Non-imaging variables | 0.27 (0.10) | 11.0 (1.3) | 0.50 (0.14) |  < 0.001 | 4.67 (0.33) | |
CXR + non-imaging variables | 0.07 (0.02) | 11.0 (2.1) | 0.11 (0.04) | 0.120 | 4.54 (0.36) | |
Day 5 | CXR | 0.32 (0.08) | 8.03 (1.9) | 0.32 (0.11) | 0.002 | 5.01 (0.44) |
Non-imaging variables | 0.40 (0.12) | 7.94 (1.7) | 0.25 (0.19) |  < 0.001 | 4.88 (0.38) | |
CXR + non-imaging variables | 0.41 (0.15) | 6.73 (2.1) | 0.37 (0.20) | 0.008 | 4.21 (0.56) | |
Day 1–3 | CXRs | 0.51 (0.13) | 6.49 (1.3) | 0.58 (0.11) |  < 0.001 | 3.41 (0.32) |
Non-imaging variables | 0.62 (0.18) | 3.76 (1.1) | 0.54 (0.12) |  < 0.001 | 3.13 (0.35) | |
CXR + non-imaging variables | 0.47 (0.12) | 7.69 (1.2) | 0.53 (0.11) |  < 0.001 | 2.96 (0.33) | |
Day 3–5 | CXRs | 0.57 (0.16) | 8.85 (1.6) | 0.52 (0.12) |  < 0.001 | 3.14 (0.57) |
Non-imaging variables | 0.62 (0.17) | 5.43 (1.1) | 0.50 (0.15) |  < 0.001 | 3.11 (0.32) | |
CXR + non-imaging variables | 0.59 (0.17) | 6.79 (1.3) | 0.51 (0.13) |  < 0.001 | 3.05 (0.41) | |
Day 1–5 | CXRs | 0.60 (0.13) | 6.55 (1.1) | 0.80 (0.18) |  < 0.001 | 3.11 (0.25) |
Non-imaging variables | 0.62 (0.12) | 6.26 (1.0) | 0.69 (0.18) |  < 0.001 | 2.88 (0.25) | |
CXR + non-imaging variables | 0.69 (0.10) | 3.52 (0.7) | 0.66 (0.15) |  < 0.001 | 2.56 (0.24) |