Patient and tumour characteristics and univariate analysis for overall survival in 131 cases of high grade osteosarcoma
| Variable | No. of cases | % 5 year survival rate (95% CI) | Log rank p value | Relative risk (95% CI) |
|---|---|---|---|---|
| CI, confidence interval. | ||||
| Size (cm) | 0.003 | |||
| <10 | 64 | 54.8 (41.1 to 68.4) | 1 | |
| ⩾10 | 67 | 28.6 (17.2 to 40.1) | 2.1 (1.3 to 3.4) | |
| Surgical margin | <0.001 | |||
| Adequate | 112 | 48.5 (38.5 to 58.5) | 1 | |
| Inadequate | 19 | 15.8 (0 to 32.2) | 2.9 (1.7 to 5.1) | |
| Chemotherapy effect | 0.03 | |||
| Good | 20 | 55.2 (29.1 to 81.2) | 1 | |
| Moderate | 31 | 45.6 (22.6 to 68.6) | 1.2 (0.5 to 3.2) | |
| Poor | 36 | 27.7 (12.5 to 43.0) | 2.6 (1.1 to 6.0) | |
| Rosette-like feature | 0.008 | |||
| None | 113 | 45.8 (35.9 to 55.7) | 1 | |
| Present | 18 | 13.5 (0 to 30.8) | 2.2 (1.2 to 3.9) | |