Table 5.
Multivariate Cox proportional hazards model for both metastasis groupings
| Original Groupings | New groupings | |||||
|---|---|---|---|---|---|---|
| Reference | Hazard Ratio | P value | Reference | Hazard Ratio | P value | |
| Number of Metastases | 1 vs 2–4 | 1.103 | 0.005 | 1 vs 2–10 | 1.110 | 0.001 |
| 2–4 vs 5–10 | 1.015 | 0.692 | 2–10 vs >10 | 1.128 | 0.002 | |
| 5–10 vs >10 | 1.117 | 0.014 | ||||
| Age (years) | 1.003 | 0.015 | 1.003 | 0.015 | ||
| KPS (points) | 0.979 | <.001 | 0.979 | <.001 | ||
| CITV (cc) | 1.007 | <.001 | 1.007 | <.001 | ||
| Systemic disease Status | uncontrolled | 0.582 | <.001 | uncontrolled | 0.582 | <.001 |
| Breast vs other histology | Other histology | 0.838 | 0.000 | Other histology | 0.839 | <.001 |
| AIC | 80238 | 80203 |
Note: Categories with no reference group were continuous variables, and their corresponding hazard ratios refer to an increment of 1 of their respective units.