Table 1.
Patient characteristics.
| Characteristics | n | P-valuea,b | Hazard ratioa,b | 95% CIa,b |
|---|---|---|---|---|
| Age | ||||
| < 20 | 18 (82%) | |||
| > 20 | 4 (18%) | 0.06 | 0.16 | 2.3 × 10−10–1.3 |
| Median | 13 | |||
| Gender | ||||
| Male | 15 (68%) | 0.05 | 0.20 | 1.9 × 10−10–1.2 |
| Female | 7 (32%) | |||
| Tumor volume (cm3) | ||||
| Median | 1,476 | 0.40 | 0.48 | 0.04–3.0 |
| Range | 85–10,590 | |||
| Tumor surface (cm2) | ||||
| Median | 19.2 | 0.43 | 0.50 | 0.02–3.3 |
| Range | 3.2–57.7 | |||
| Pattern on MRI | ||||
| Concentric | 19 (86%) | 0.72 | 0.47 | 0.10–2.1 |
| Longitudinal | 3 (14%) | |||
| Histologic response | ||||
| Good | 12 (54%) | – | – | – |
| Poor | 10 (46%) | – | – | – |
| Pathologic subtype | ||||
| Osteoblastic | 10 (46%) | – | – | – |
| Chondroblastic | 6 (27%) | – | – | – |
| Fibroblastic | 4 (18%) | – | – | – |
| Other | 2 (9%) | – | – | – |
| Location | ||||
| Distal femur | 22 (100%) | – | – | – |
| Metastatic disease | ||||
| No | 22 (100%) | – | – | – |
Major demographic, clinicopathological, and MRI characteristics of the patient group and their predictive evaluation by the binary logistic regression test.
aBinary logistic regression test, bootstrap corrected.
bObtained with data categorized by an optimal threshold.
CI, confidence interval; n, number of patients.