Table 3. . Log-rank tests and multivariable Cox regression analysis for overall survival among age-groups.
| Characteristics | n (%) | Univariable | Multivariable | ||
|---|---|---|---|---|---|
| Median time (months) | Log-rank p-value | HR (95% CI) | p-value | ||
| <50 years | 5,729 (100) | <0.001 | |||
| KRAS mutated | 2,391 (41.7) | 23.5 | Ref | ||
| KRAS wildtype | 3,338 (58.3) | 28.8 | 0.80 (0.75–0.86) | <0.001 | |
| 50–69 years | 14,345 (100) | <0.001 | |||
| KRAS mutated | 6,226 (43.4) | 21.0 | Ref | ||
| KRAS wildtype | 8,119 (56.6) | 23.4 | 0.93 (0.89–0.97) | <0.001 | |
| ≥70 years | 6,021 (100) | 0.34 | |||
| KRAS mutated | 2,721 (45.2) | 14.3 | Ref | ||
| KRAS wildtype | 3300 (54.8) | 13.9 | 1.00 (0.95–1.06) | 0.89 | |
HR: Hazard ratio; Ref: Reference.