Table 1.
Significant Factors Affecting Overall and Event‐Free Survival11
| Parameter | χ2 | df | P | 5‐Year Overall Survival | |
|---|---|---|---|---|---|
| % | 95% CI | ||||
| Factors significant for overall survival | |||||
| PRETEXT | |||||
| I‐II | 6.6 | 2 | 0.09 | 44 | 16–72 |
| III | 22 | 0–49 | |||
| IV | 8 | 0–28 | |||
| Metastases | |||||
| Yes | 15 | 1 | 0.0001 | 9 | 0–26 |
| No | 37 | 19–57 | |||
| Multifocality | 4.52 | 1 | 0.03 | 11 | 0–26 |
| Unifocality | 45 | 21–70 | |||
| Factors significant for event‐free survival | |||||
| Metastases | |||||
| Yes | 17.4 | 1 | 0.0001 | 0 | 0–0 |
| No | 25 | 8–41 | |||
| Vascular Invasion | |||||
| Yes | 3.06 | 1 | 0.08 | 0 | 0‐0 |
| No | 27 | 4–49 | |||
PRETEXT refers to PREtreatment EXTent of disease, a staging and risk stratification system for liver tumors designed by the International Childhood Liver Tumor Strategy Group (SIOPEL) to describe the radiographic appearance of tumors prior to any treatment; X2 refers to Chi‐squared; df: discriminant function.