Table 6.
Comparison of the two cohorts
| This study (n = 142) | Sekhar (n = 42) | |
|---|---|---|
| Age (years) | 42 (median) | 41 (mean) |
| GTR (%) | 13 | 36 |
| Follow-up (months) | 51 | 50 |
| Local recurrence (%) | 24 | 19 |
| LC (%) | 75 (at 5 y) | 81 (at 1 y) |
| OS (%) | 83 (at 5 y) | 100 (at 1 y) |
| SGSCC Score | ||
| < 8 (%) | 28 | 19 |
| 8 to 12 (%) | 59 | 55 |
| > 12 (%) | 13 | 26 |
| TED (cm) | 3.4 (median) | 3.3 (mean) |
| Number of sites involved | 3 (median) | 4.6 (mean) |
| Vascular involvement (number of vessels) | 1 (median) | na |
| Intradural invasion (%) | 87 | 73 |
| Treatment for recurrence (%) | 15 | 40 |
GTR gross total resection, LC local control, OS overall survival, SGSCC Sekhar Grading System for Cranial Chordoma, TED tumor equivalent diameter