| Primary indicators | Secondary indicators | Tertiary indicators | Total | |
|---|---|---|---|---|
| First-round | ||||
| Kendall’s W | 0.20 | 0.24 | 0.27 | 0.25 |
| χ2 | 15.14 | 83.57 | 307.64 | 404.43 |
| p | 0.004 | < 0.001 | < 0.001 | < 0.001 |
| Second-round 2 | ||||
| Kendall’s W | 0.24 | 0.34 | 0.24 | 0.24 |
| χ2 | 17.85 | 95.84 | 229.45 | 327.47 |
| p | 0.001 | < 0.001 | < 0.001 | < 0.001 |