Research Article

Predictors of Memory and Processing Speed Dysfunctions after Traumatic Brain Injury

Table 1

Demographic and clinical characteristics of study participants.

Total sample ( ) Mild TBI ( )Moderate TBI ( )Severe TBI ( )

Age (years)
Male (%) 24 (80.0)6 (85.7)7 (77.8)11 (78.6)
Education (years)
MMSE scores during the study
GCS score at admission
Time from injury to cognitive testing, mo
Duration of unconsciousness
 <8 days20 (66.7)7 (100)7 (77.8)6 (42.9)
 >7 days13 (33.3)0 (0)2 (22.2)8 (57.1)
Presence of emergent craniotomy (%) 17 (56.7)0 (0)5 (55.6)12 (85.7)
Loss of consciousness (%) 27 (90.0)5 (71.4)9 (100)13 (92.9)
Side of brain damage (%)
 Right brain15 (50.0)4 (57.1)5 (55.6)6 (42.9)
 Left brain11 (36.7)1 (14.3)3 (33.1)7 (50.0)
 Bilateral 4 (13.3)2 (28.6)1 (11.1)1 (7.1)
Types of brain injury (%)
 Closed head injury21 (70.0)7 (100)5 (55.6)9 (64.3)
 Open head injury9 (30.0)0 (0)4 (44.4)5 (35.7)
Hemorrhagic locations
 Intracerebral 3 (10.0)1 (14.3)0 (0)2 (14.3)
 Subarachnoid7 (23.3)4 (57.1)3 (33.3)0 (0)
 Epidural2 (6.7)0 (0)0 (0)2 (14.3)
 Subdural5 (16.7)0 (0)1 (11.1)4 (28.6)
 Multiple sites13 (43.3)2 (28.6)5 (55.6)6 (42.9)
Presence of countercoup lesion (%) 16 (53.3)3 (42.9)6 (66.7)7 (50.0)

GCS: Glasgow Coma Scale; MMSE: Mini-Mental State Examination; TBI: traumatic brain injury.