Results of brain tumor classification by two TE (30 and 136) into four groups with linear discriminant analysis, evaluated with the leave-one-out method (in parenthesis are shown the tumors of each group according to the definitive diagnosis)
| Short TE Classification | Long TE Classification | Total | |||
|---|---|---|---|---|---|
| MEN | LGA | AA | GBM-MET | ||
| MEN | 28 (28 MEN) | 2 (1 AA, 1 GBM-MET) | 1 (1 MEN) | 6 (3 GBM-MET, 2 MEN, 1 LGA) | 37 (31 MEN, 4 GBM-MET, 1 AA, 1LGA) |
| LGA | 1 (1 MEN) | 8 (6 LGA, 2 AA) | 2 (1 AA, 1 GBM-MET) | 5 (2 AA, 1 LGA, 1 GBM-MET) | 16 (8 LGA, 5 AA, 2 GBM-MET, 1 MEN) |
| AA | 0 | 6 (2 LGA, 2 AA, 2 GBM-MET) | 8 (6 AA, 1 GBM-MET, 1 LGA) | 3 (2 GBM-MET, 1 AA) | 17 (9 AA, 5 GBM, 3 LGA) |
| GBM-MET | 6 (3 GBM-MET, 3 MEN) | 6 (6 GBM-MET) | 1 (1 GBM-MET) | 68 (65 GBM-MET, 2 MEN, 1 AA) | 81 (75 GBM-MET, 5 MEN, 1 AA) |
| Total | 35 (32 MEN, 3 GBM-MET) | 22 (9 GBM-MET, 8 LBA, 5 AA) | 12 (7 AA, 3 GBM-MET, 1 LGA, 1 MEN) | 82 (71 GBM-MET, 4 MEN, 3 LGA, 4 AA) | 151 (86 GBM-MET, 37 MEN, 16 AA, 12 LGA) |
Note.—Classification accuracy of the whole tumor set into four groups was higher at short TE (123/151; .81 [.75–.88]) (tumors correctly classified/total of tumors; accuracy [95% confidence intervals]) than at long TE (118/151; .78 [.71–.85]). MEN indicates meningioma; LGA, low grade astrocytoma; AA, anaplastic astrocytoma; GBM-MET, glioblastoma-metastasis group.