Table 1.
Patient and demographic characteristics of the OS cases used in the tissue microarray analysis.
| Characteristic | Time (year) | n (%) |
|---|---|---|
| All | 136 | |
| Age (median; range) | 17.6; 4.6–75.5 | |
| Gender | ||
| Female | 69 (51) | |
| Male | 67 (49) | |
| Race | ||
| White | 115 (85) | |
| African American | 17 (13) | |
| Other | 3 (2) | |
| Asian | 1 (< 1) | |
| Histologic subtype | ||
| Osteoblastic | 52 (38) | |
| Fibroblastic | 32 (24) | |
| Other | 28 (20) | |
| Chondroblastic | 24 (18) | |
| Site, n = 135 | ||
| Extremity | 118 (87) | |
| Other | 18 (13) | |
| Grade | ||
| High | 125 (92) | |
| Low | 8 (6) | |
| Intermediate | 3 (2) | |
| Metastasis at diagnosis | ||
| No | 120 (88) | |
| Yes | 16 (12) | |
| Histologic response, n = 115 | ||
| Good | 73 (63) | |
| Poor | 42 (37) | |
| Alive or dead | ||
| Alive | 73 (54) | |
| Dead | 63 (46) | |