E-ISSN : 2733-4538
The Clock Drawing Test(CDT) has the strength to evaluate several domains of the neurocognitive function in a short period of time. However, most studies have been focused mainly on the efficiency of the CDT for differentiating dementia patients. The purpose of this study was to investigate whether the CDT could correctly reflect the severity of brain injury in patients with traumatic brain injury as well as differentiating dementia patients or not. After the clinical characteristics were examined, the CDT and the Korean-Wechsler Adult Intelligence Test(K-WAIS) were administered to 69 patients with mental disorders due to traumatic brain injury. Based on the severity classification of brain injury by Golden and Golden(2003), the patients were classified into two groups; mild to moderate and severe to very severe. The two groups' scores on 3 subscoring systems and the total scores of the CDT were compared. The correlations between the performance of the K-WAIS and the CDT response and the relationships between the severity of brain injury and the error type of the CDT response were tested. As a result, there were correlations between the severity of brain injury and lower CDT scores in patients. Additionally, the CDT score was more correlated with the subtest scores and IQ of the K-WAIS in the severe to very severe group than the mild to moderate group. The group with severe to very severe brain injury showed much more errors in size of the clock and graphic difficulties but didn't show the others of the errors types. These results suggest that the CDT can be useful in assessing the neurocognitive function of the traumatic brain injured patients as well as the dementia patients. Finally, the suggestions, limitations and further issues for future study were discussed.
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