Table 1.
Clinical characteristics of patients with IDH mutant gliomas included in analysis
| Number of patients | 275 |
| Median age at diagnosis (range) | 38 (19–86) |
| Male:female ratio | 1.17 |
| Histologic grade (%) | |
| WHO grade II | 134 (48.7) |
| WHO grade III | 141 (51.3) |
| Molecular diagnosis (%) | |
| Astrocytic | 180 (65.4) |
| Oligodendroglial | 95 (34.6) |
| Extent of resection (%) | |
| Gross total resection | 142 (51.6) |
| Subtotal resection | 100 (36.4) |
| Biopsy | 33 (12.0) |
| Adjuvant treatment (%) | |
| RT only | 44 (16.0) |
| RT with chemotherapy | 108 (39.3) |
| Chemotherapy only | 31 (11.3) |
| None | 92 (33.4) |
| Median follow-up | |
| Non-progressors | 6.4 y |
| Survivors | 5.5 y |