Table 2 Meta-analysis results of the C-index of the prediction model for KOA patients
Modeling variables | Training set | Validation set | ||||
|---|---|---|---|---|---|---|
No | c-index | I2(%) | No | c-index | I2(%) | |
Clinical feature | 4 | 0.713 (0.628 – 0.799) | 99.7 | 2 | 0.656 (0.526 – 0.786) | 96.4 |
Radiomics | ||||||
 X-ray | 3 | 0.895 (0.865 – 0.924) | 84.9 | 12 | 0.882 (0.825 – 0.939) | 98.2 |
 MRI | 2 | 0.755 (0.508 – 1.000) | 99.0 | 2 | 0.725 (0.499 – 0.950) | 94.8 |
 Overall | 5 | 0.841 (0.777 – 0.904) | 97.4 | 14 | 0.861 (0.806 – 0.916) | 98.1 |
Clinical feature + radiomics | ||||||
 Clinical feature + X-ray | 7 | 0.867 (0.824–0.909) | 95.4 | 9 | 0.837 (0.810–0.865) | 59.4 |
 Clinical feature + MRI | 2 | 0.772 (0.539 – 1.000) | 98.9 | 2 | 0.758 (0.540 – 0.977) | 95.2 |
 Clinical feature + MRI + X-ray | 6 | 0.842 (0.816–0.867) | 86.7 | 2 | 0.876 (0.842–0.910) | 0 |
 Clinical feature + US + X-ray | 1 | 0.820 (0.725–0.915) | NA |  |  |  |
 Overall | 16 | 0.844 (0.815 – 0.873) | 95.4 | 13 | 0.831 (0.799 – 0.863) | 79.1 |