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Survival analysis of patients with single IRF or no risk factors receiving AT
| Variables | All (n) | AT [n (%)] | Observation [n (%)] | P | |
| OS | DFS | ||||
| IRF, intermediate-risk factor; AT, adjuvant therapy; LVSI, lymphovascular space invasion ; DSI, deep stromal invasion; OS, overall survival; DFS, disease-free survival. | |||||
| Single IRF | 473 | 288 (60.9) | 185 (39.1) | 0.273 | 0.197 |
| LVSI only | 100 | 91 (91.0) | 9 (9.0) | 0.146 | 0.785 |
| DSI only | 132 | 116 (87.9) | 16 (12.1) | 0.708 | 0.866 |
| G3 only | 172 | 97 (56.4) | 75 (43.6) | 0.799 | 0.750 |
