Cognitive Impairment after Severe Traumatic Brain Injury, Clinical Course and Impact on Outcome: A Swedish-Icelandic Study
Table 3
BNIS total (raw) score at 3 weeks, 3 months, and 1 year and description of educational level and previous medical disorders (including any learning, memory, or concentration difficulties).
3 weeks
Number (female/male)
42 (10/32)
Total (raw) score median (range)
38.5 (18–50)
Total (raw) score mean (SD)
37.2 (8.3)
Education <12 years total (raw) score mean (SD)
34.8 (7.9)
/total (%)
3 weeks
Education <12 years
Missing = 1
5 female + 14 male/41 (46)
Previous brain injury requiring hospitalization
Missing = 3
6/39 (15)
Previous brain injury requiring CT scan of the brain
Missing = 0
6/42 (14)
Previous mental illness
Missing = 2
6/40 (15)
Previous learning problem
Missing = 2
6/40 (15)
Previous difficulty to remember
Missing = 2
8/40 (20)
Previous difficulty to concentrate
Missing = 2
7/40 (17)
3 months
Number (female/male)
75 (19/56)
Total (raw) score median (range)
41.0 (23–50)
Total (raw) score mean (SD)
40.4 (7.0)
Education <12 years, total (raw) score mean (SD)
38.2 (6.9)
/total (%)
3 months
Education <12 years
Missing = 4
7 female + 22 male/71 (41)
Previous brain injury requiring hospitalization
Missing = 8
12/67 (18)
Previous brain injury requiring CT scan of the brain
Missing = 7
12/68 (18)
Previous mental illness
Missing = 4
11/71 (15)
Previous learning problem
Missing = 4
7/71 (10)
Previous difficulty remembering
Missing = 4
10/71 (14)
Previous difficulty concentrating
Missing = 4
11/71 (15)
1 year
Number (female/male)
78 (21/57)
Total (raw) score median (range)
42.0 (16–50)
Total (raw) score mean (SD)
40.3 (7.8)
Education <12 years, total (raw) score mean (SD)
38.1 (7.6)
/total (%)
1 year
Education <12 years
Missing = 4
7 female + 25 male/74 (43)
Previous brain injury requiring hospitalization
Missing = 8
13/70 (19)
Previous brain injury requiring CT scan of the brain
