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| Characteristics | Groups | Number (percentage) |
| Age | <60 | 442 (86%) |
| >60 | 69 (14%) | |
| Gender | Male | 283 (55%) |
| Female | 228 (45%) | |
| Grade | G2 | 246 (48%) |
| G3 | 264 (52%) | |
| Histology | Astrocytoma | 193 (38%) |
| Oligodendroglioma | 187 (36%) | |
| Mixed glioma | 131 (26%) |
