Table 1 Patient demographic of training cohort and test cohort
Demographic | Training cohort (n = 187) | Test cohort (n = 184) | t/χ2 | P |
|---|---|---|---|---|
Age (mean ± SD, years) | 67.65 ± 8.42 | 67.03 ± 8.91 | 1.431 | 0.319 |
Gender (n (%)) | ||||
 Male | 140 (74.87) | 131 (71.20) | 0.635 | 0.426 |
 Female | 47 (25.13) | 53 (28.80) | ||
TNM stage (n (%)) | ||||
 I | 96 (51.34) | 81 (44.02) | 2.030 | 0.566 |
 II | 60 (32.08) | 67 (36.41) | ||
 III | 29 (15.51) | 34 (18.48) | ||
 IV | 2 (1.07) | 2 (1.09) | ||
Alive (n (%)) | ||||
 yes | 64 (34.22) | 81 (44.02) | 3.739 | 0.053 |
 no | 123 (65.78) | 103 (55.98) | ||
Survival time (mean ± SD, years) | 1.64 ± 1.34 | 1.53 ± 1.63 | 0.742 | 0.458 |