Table 3 Selected factors according to the Cox PHs regression model based on the training and validation cohorts
Characteristics | Training set | Validation set | ||
|---|---|---|---|---|
HR (95% CI) | P value | HR (95% CI) | P value | |
Receiving local treatment (Surgery/WBRT/SRS) | ||||
 Yes | 1 |  | 1 |  |
 No | 1.769(1.471–2.127) |  < 0.001 | 1.806(1.504–2.169) |  < 0.001 |
Receiving chemotherapy | ||||
 Yes | 1 |  | 1 |  |
 No | 1.313(1.082–1.618) | 0.006 | 1.318(1.078–1.612) | 0.007 |
NLR | ||||
  ≥ 4.71 | 1 |  | 1 |  |
  < 4.71 | 0.630(0.517–0.767) |  < 0.001 | 0.634(0.521–0.772) |  < 0.001 |
Albumin | ||||
  < 40 mg/l | 1 |  | 1 |  |
  ≥ 40 mg/l | 0.617(0.514–0.741) |  < 0.001 | 0.610(0.508–0.732) |  < 0.001 |