Table 4.
Difference in OS between the four newly introduced disease stages and distribution by disease stage
| Disease stage | Stage IA + IB | Stage IIA + IIB + IIIA | Stage IIIB | Stage IV | Limited disease
|
Extensive disease
|
||
|---|---|---|---|---|---|---|---|---|
| MS | 95% CI | MS | 95% CI | |||||
| Stage IA + IB | NA | P < 0.001 | P < 0.001 | P < 0.001 | 512 | 419.03–604.97 | NA | |
| Stage IIA + IIB + IIIA | P < 0.001 | NA | P = 0.004 | P < 0.001 | 360 | 304.49–415.51 | 305 | 239.56–370.44 |
| Stage IIIB | P < 0.001 | P = 0.004 | NA | P < 0.001 | 262 | 187.36–336.63 | 302 | 205.71–398.29 |
| Stage IV | P < 0.001 | P < 0.001 | P < 0.001 | NA P < 0.001 |
359 | 315.82–402.18 | 246 P < 0.001 |
231.07–260.93 |
Abbreviations: CI, confidence interval; MS, median survival; NA, not available; OS, overall survival.