Table 1. Baseline Characteristics of the Patients.
| Variables | Training Data Set | Testing Data Set | P |
|---|---|---|---|
| Patients | 525 | 225 | |
| Age, mean ± SD (years) | 57.4 ± 9.9 | 58.3 ± 9.4 | 0.238 |
| Sex (%) | 0.742 | ||
| Male | 430 (81.9) | 182 (80.9) | |
| Female | 95 (18.1) | 43 (19.1) | |
| Etiology (%) | 0.359 | ||
| HBV | 419 (79.8) | 176 (78.2) | |
| HCV | 55 (10.5) | 31 (13.8) | |
| Others | 51 (9.7) | 18 (8.0) | |
| Tumor size (cm) | 1.90 ± 0.63 | 1.88 ± 0.64 | 0.668 |
| Albumin (g/dL), mean ± SD | 3.73 ± 0.47 | 3.79 ± 0.45 | 0.134 |
| Bilirubin (mg/dL), mean ± SD | 1.09 ± 0.49 | 1.06 ± 0.38 | 0.426 |
| AFP (ng/mL), median (IQR) | 14.3 (5.90–86.50) | 14.3 (5.70–39.50) | 0.492 |
| Tumor margin (%) | 0.189 | ||
| Smooth | 377 (71.8) | 172 (76.4) | |
| Irregular | 148 (28.2) | 53 (23.6) | |
| Tumor enhancement (%) | 0.368 | ||
| Typical | 439 (83.6) | 194 (86.2) | |
| Atypical | 86 (16.4) | 31 (13.8) | |
| Tumor location (%) | 0.115 | ||
| Central | 93 (17.7) | 51 (22.7) | |
| Peripheral | 432 (82.3) | 174 (77.3) |
AFP = α-fetoprotein, HBV = hepatitis B virus, HCV = hepatitis C virus, IQR = interquartile range, SD = standard deviation