Table 1 The baseline characteristics of all patients
Characteristic | Training set (n = 194) | Validation set (n = 66) | Test set (n = 66) | All patients (n = 326) | P value |
|---|---|---|---|---|---|
Age, mean ± std | 55.4 ± 9.7 | 53.9 ± 10.0 | 55.2 ± 9.5 | 55.0 ± 9.8 | > 0.01 |
Gender, (%) | > 0.01 | ||||
Male | 59 (30.4%) | 17 (25.8%) | 17 (25.8%) | 93 (28.5%) | |
Female | 135 (69.6%) | 49 (74.2%) | 49 (74.2%) | 233 (71.5%) | |
WHO grade, (%) | > 0.01 | ||||
Low-grade | 170 (87.6%) | 56 (84.8%) | 57 (84.4%) | 283 (86.8%) | |
High-grade | 24 (12.4%) | 10 (15.2%) | 9 (13.6%) | 43 (13.2%) |