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Table 1 Clinicopathological characteristics of the diffusely infiltrating astrocytoma patients (n = 150) according to WHO classification

From: Elevated expression of hyaluronan synthase 2 associates with decreased survival in diffusely infiltrating astrocytomas

Variable Grade II Grade III Grade IV Total
Number of cases 25 (16.7%) 6 (4.0%) 119 (79.3%) 150 (100.0%)
Gender
 Male 20 (80.0%) 1 (16.7%) 66 (55.5%) 87 (58.0%)
 Female 5 (20.0%) 5 (83.3%) 53 (44.5%) 63 (42.0%)
Mean age at time of diagnosis (years) 40.6 46.2 58.3 54.8
Mean survival time (months) 36.5 29.5 13.4 18.0
Alive
 Yes 9 (36.0%) 2 (33.3%) 6 (5.0%) 17 (11.3%)
 No 16 (64.0%) 3 (50.0%) 108 (90.8%) 127 (84.7%)
 No information 0 (0.0%) 1 (16.7%) 5 (4.2%) 6 (4.0%)
Cause of death
 Glioma 16 (100.0%) 3 (100.0%) 108 (100.0%) 127 (100.0%)
 Other causes 0 (0.0%) 0 (0.0%) 0 (0.0%)  
Surgical operation
 No 0 (0.0%) 0 (0.0%) 0 (0.0%) 0 (0.0%)
 Resection 21 (84.0%) 6 (100.0%) 114 (95.8%) 141 (94.0%)
 Biopsy 4 (16.0%) 0 (0.0%) 4 (3.4%) 8 (5.3%)
 No information 0 (0.0%) 0 (0.0%) 1 (0.8%) 1 (0.7%)