Quality of life and neuropsychological changes in mild head trauma: Late analysis and correlation with S100B protein and cranial CT scan performed at hospital admission
Introduction
Mild head trauma (MHT) is defined as a transient neurological deficit after a trauma resulting from acceleration and deceleration forces that cause impairment or loss of consciousness lasting less than 15 min, short retrograde amnesia, change in the level of consciousness without focal neurological deficits and Glasgow coma scale between 13 and 15 at hospital admission.20, 25 MHT can evolve with late complications which are less frequent than those observed after moderate or severe head trauma. However, when present, they can cause neurological sequelae similar to those resulting from more severe head trauma.5, 26 To rule out intracranial injuries after MHT, several authors suggested the systematic use of cranial computed tomography scan (CCT). However, the feasibility of this approach is questionable, due to its high costs.2 The S100B protein, due to its high negative predictive value, has been used to exclude the need for CCT in victims of MHT, especially those presenting alcohol or drug intoxication.2, 23 There is a hypothesis that psychological sequel, as such as anxiety, depression, post-concussion syndrome and post-traumatic syndromes might be detected even after MHT.16 The relationship between trauma severity and the resulting neuropsychological changes has not been totally explained. Some authors suggest that MHT may increase the incidence of depressive symptoms and that these episodes are associated with an increased frequency of disorders, such as anxiety, cognitive impairment and incapacities in general.18 This study aimed to test the hypothesis that MHT may impact quality of life, onset of anxiety and depression and be correlated with post-concussion syndrome signs and symptoms even after 18 months following the trauma. Moreover, we aimed to correlate those signs and symptoms with these data with detection of abnormalities in the CCT and serum S100B protein levels at hospital admission, just after the trauma.
Section snippets
Patients and methods
This research was approved by the Ethics Committees of the Hospital das Clínicas, in Sao Paulo city, and João XXIII Trauma Center in Belo Horizonte. All patients had signed an informed consent form.
Results
After 18 months, we were able to contact 41 of 50 patients initially treated, and 39 of them accepted to take part in the study signing the informed consent. The mean age was 39 years ±2.87, 51.3% (n = 20) were male and 48.7% (n = 19) were female. As to controls, the mean age of was 40 ± 2.14 years, 64.9% (n = 24) were men and 35.1% (n = 13) were women. Two patients lived alone and were excluded from the comparative statistical analysis. Concerning schooling, 41% of patients and 37.1% of controls had
Discussion
In our study, patients with isolated MHT presented lower quality of life indices than their respective controls. Trauma victims were also more anxious according to the HADS assessment. We also found that MHT can evolve persistent signs and symptoms related to post-concussion syndrome more than 1 year after trauma. There was no correlation between persistence of these symptoms, quality of life indices, anxiety or depression with S100B protein levels at hospital admission, held 18 months before.
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