Table 2.
Kaplan-Meier Analyses (log-rank test) of the Predictive Value of Baseline Characteristics on OS
| Variables | OS (months) | 95%CI | P |
|---|---|---|---|
| Total | 80 | (63.8-98.6) | |
| Sex | |||
| Male | 77.4 | (52.6-88.3) | .913 |
| Female | 78.7 | (57.3-96.8) | |
| Age | |||
| <60 years | 79.6 | (59.5-89.7) | .757 |
| ≥60 years | 63 | (46.4-78.5) | |
| KPS | |||
| ≥80% | 78.4 | (65.7-94.8) | .033 |
| 60%-80% | 66.5 | (55.8-78.4) | |
| <60% | 43.2 | (37.3-54.9) | |
| Enneking stage | |||
| I | 81.3 | (73.2-99.1) | <.001 |
| II–III | 34.5 | (26.7-48.5) | |
| Tumor differentiation | |||
| Classical | 75.7 | (65.3-88.4) | .042 |
| Non-classical (chondroid, dedifferentiated) | 43.5 | (22.4-53.1) | |
| Tumor size | |||
| <6 cm | 70.4 | (53.7-80.7) | .633 |
| ≥6 cm | 48.1 | (37.6-53.4) | |
| Tumor metastasis | |||
| Without metastasis | 75.9 | (59.7-91.3) | .008 |
| With metastasis | 23.5 | (17.1-38.9) | |
| Localization | |||
| Cranial | 66.8 | (47.5-79.9) | .641 |
| Spine | 71.2 | (49.9-89.6) | |
| Sacrum | 55.8 | (39.9-75.7) | |
| Lymphocyte cells count | |||
| <1.8*10^10 | 77.8 | (53.8-85.9) | .893 |
| ≥1.8*10^10 | 65 | (51.3-77.9) | |
| Neutrophil cells count | |||
| <3.4*10^9 | 77.3 | (53.5-86.2) | .317 |
| ≥3.4*10^9 | 64 | (43.4-78.6) | |
| NLR | |||
| <1.65 | 82.3 | (73.5-91.9) | .023 |
| ≥1.65 | 56.4 | (37.4-78.8) | |
| PLR | |||
| <121 | 81.7 | (77.3-93.7) | .024 |
| ≥121 | 58.6 | (47.9-85.4) | |
| MLR | |||
| <0.36 | 81.3 | (55.7-91.4) | .635 |
| ≥0.36 | 67.4 | (46.7-83.5) | |
| SII | |||
| <370*10^9 | 81.6 | (73.1-89.4) | .008 |
| ≥370*10^9 | 55.9 | (39.8-76.7) |
OS, Overall survival; CI, Confidence interval; KPS, Karnofsky performance status; NLR, Neutrophil-lymphocyte ratio; PLR, Platelet-lymphocyte ratio; MLR, Monocyte-lymphocyte ratio; SII, Systemic immune-inflammation index.