Table 6. Differences between T categories (IASLC/ITMIG TNM staging proposal).
| HR vs. adjacent T category | CIR, R0 (60/1,039)* |
OS, R0 (21/1,064)* |
OS, any R (29/1,139)* |
|||||
|---|---|---|---|---|---|---|---|---|
| HR | P | HR | P | HR | P | |||
| T1b vs. T1a | 3.299 | 0.029 | 5.574 | 0.010 | 8.624 | 0.000 | ||
| T2 vs. T1b | 1.898 | 0.323 | 0.410 | 0.443 | 0.266 | 0.227 | ||
| T3 vs. T1b | 1.941 | 0.225 | 0.607 | 0.485 | 0.330 | 0.061 | ||
| T2 vs. T1 | 6.299 | 0.000 | 1.837 | 0.558 | 1.497 | 0.696 | ||
| T3 vs. T2 | 1.022 | 0.963 | 1.461 | 0.726 | 1.469 | 0.720 | ||
| T4 vs. T3 | — | — | — | — | 8.088 | 0.001 | ||
Hazard ratios and statistical differences (χ2) by Cox proportional hazards regression models, adjusted by diagnosis. *, number of events/total number of patients in entire data set for the particular analysis. IASLC, the International Association for the Study of Lung Cancer; ITMIG, the International Thymic Malignancies Interest Group; HR, hazard ratio; CIR, cumulative incidence of recurrence; R0, complete resection; OS, overall survival.