Outcome from Complicated versus Uncomplicated Mild Traumatic Brain Injury
Table 2
Demographic and injury severity characteristics.
Uncomplicated MTBI
Complicated MTBI
M
SD
M
SD
Age (in years)
30.8
9.0
29.2
10.9
0.601
.17
Education (in years)
13.1
2.3
12.9
2.3
0.859
.06
WAIS-III information (SS)
10.9
2.4
10.4
1.4
0.492
.23
GCS score in ED
14.9
0.3
14.9
0.3
0.693
.13
Days tested after Injury
26.0
2.9
25.4
3.0
0.523
.21
Duration of loss of consciousness (minutes)
0.6
1.5
1.0
1.5
0.514
.25
Duration of posttraumatic amnesia (minutes)
333.0
448.2
366.7
420.8
0.822
.08
Duration of retrograde amnesia (minutes)
9.2
23.6
21.5
66.6
0.354
.34
Number of days to return to work
12.9
18.8
58.0
83.8
0.002
1.2
f
%
f
%
χ 2
Gender
Male
17
50.0
7
53.8
0.813
—
Mechanism of injury
MVA
15
44.1
5
38.5
0.726
—
Other bodily injuries
9
26.5
4
30.8
0.768
—
CT: day of injury
Abnormal
0
0
8
61.5
—
—
MRI: 3 weeks after
Abnormal
0
0
12
92.3
—
—
Not available
0
0
1
7.7
Note: (uncomplicated MTBI, ; complicated MTBI, ). Cohen’s effect size (d): small (.20), medium (.50), large (.80). CT= computed tomography; MRI:magnetic resonance imaging; GCS: Glasgow Coma Scale; MTBI: mild traumatic brain injury; MVA: motor vehicle accident. A Mann-Whitney U test was used for the number of days to return to work comparison.
