Table 2.
Kaplan-Meier survival analysis of osteosarcoma patients.
| Variables | OS time (months) | 3-year OS (%) | P value | ||
|---|---|---|---|---|---|
| Mean ±SD | Median | ||||
| Age (years) | ≤18 ys | 46.5±4.4 | 41.0 | 59.6% | 0.850 |
| >18 ys | 48.6±3.5 | 48.0 | 77.6% | ||
| Sex | Female | 51.7±4.6 | 60.0 | 69.3% | 0.561 |
| Male | 45.5±3.5 | 44.0 | 69.5% | ||
| Location | Tibia | 48.4±5.4 | 48.0 | 65.0% | 0.577 |
| Femur | 51.8±3.2 | 51.0 | 88.2% | ||
| Humeral | 40.9±7.4 | 31.0 | 46.7% | ||
| Others | 41.3±11.9 | 23.0 | 50.0% | ||
| Tumor grade | Low | 47.8±3.6 | 48.0 | 72.0% | 0.551 |
| High | 47.7±4.2 | 45.0 | 67.7% | ||
| Metastasis | Negative | 55.1±2.9 | 55.0 | 88.1% | 0.001* |
| Positive | 36.9±4.2 | 36.0 | 44.2% | ||
| Chemotherapy response | Good | 52.5±3.3 | 55.0 | 75.0% | 0.008* |
| Poor | 36.3±2.8 | 41.0 | 60.5% | ||
| ECT2 protein level | Low | 55.4±3.5 | 60.0 | 86.0% | 0.005* |
| High | 40.6±3.7 | 41.0 | 54.6% | ||
OS – overall survival; ECT2 – epithelial cell transforming sequence 2; S.D – standard deviation.