Table 4. The effect of different second predominant groups on OS and DFS.
| Group | The second predominant group | Rate of OS (%) | Rate of DFS (%) | |||||
|---|---|---|---|---|---|---|---|---|
| 3-year | 5-year | P value | 3-year | 5-year | P value | |||
| 1 | Intermediate-grade | 93.8 | 88.0 | 86.5 | 86.5 | |||
| High-grade | 89.8 | 79.8 | 0.150 | 72.4 | 65.2 | 0.037 | ||
| 2 | Low-grade | 94.9 | 93.0 | 79.4 | 69.4 | |||
| High-grade | 90.0 | 69.6 | 0.024 | 69.0 | 62.1 | 0.300 | ||
| 3 | Low-grade | 50.0 | 31.3 | 41.7 | 41.7 | |||
| Intermediate-grade | 77.4 | 70.4 | 0.033 | 65.2 | 45.5 | 0.312 | ||
Group 1 is the low-grade predominant group, which includes lepidic subtypes. Group 2 is the intermediate-grade predominant group, which includes papillary and acinar nodule subtypes. Group 3 is the high-grade predominant group, which includes micropapillary and solid subtypes. OS, overall survival; DFS, disease-free survival.