Patient No. Age (y) Sex Acute stage Chronic stage Cognitive Function               GCS Coma Duration (d) Time After Injury When EEG Performed (d) MMSE HDS-R   WAIS-R                   TIQ VIQ PIQ 1 20 M 7 4 150 29 29 82 91 75 2† 32 M 7 7 120 23 22 48 60 45 3† 22 M 7 30 210 27 26 96 NA NA 4 14 M 7 7 90 30 26 83 91 78 5 21 M 5 15 90 23 19 58 66 60 6 17 M 7 3 90 15 18 50 64 45 7 27 M 7 100 300 Tanaka-Binet test: 2 years 10 Scale out     8 23 M 7 10 150 27 28 64 71 67 9 27 M 7 180 300 Tanaka-Binet test: 2 years Scale out Scale out     10 20 M 7 40 300 29 29 50 71 46 11 17 M 7 30 240 Tanaka-Binet test: 2 years 8 Scale out     12 38 F 7 14 180 23 28 84 82 89 13† 25 F 9 80 2370 23 28 64 88 45 14† 26 M 7 60 300 19 19 58 52 58 15† 17 M 6 7 90 19 28 78 84 75 Mean ± SD 23 ± 6   6.9 ± 0.8 39 ± 49 332 ± 570 24 ± 5 23 ± 7 68 ± 16 75 ± 13 62 ± 16

* N = 15 patients (13 male and 2 female). All patients had diffuse axonal injury. Abbreviations: EEG, electroencephalography; F, female; GCS, Glasgow Coma Scale; HDS-R, Hasegawa Dementia Scale Revised; M, male; MMSE, Mini Mental State Examination; NA, not available; PIQ, Performance Intelligence Quotient; TIQ, Total Intelligence Quotient; VIQ, Verbal Intelligence Quotient; WAIS-R, Wechsler Adult Intelligence Scale Revised; WISC-R, Wechsler Intelligence Scale for Children Revised; Scale out; could not perform neuropsychologic test due to severe mental dysfunction. † Patient had subarachnoid hemorrhage (total, 5 patients)

Table 1: Clinical and cognitive characteristics of patients who had diffuse axonal injury after traumatic brain injury*.