ISSN 2586-0151 (Print)
ISSN 2586-0046 (Online)
Volume 16, Number 1 (1/2020)
Original Article <page. 32-40 >

Clinical Characteristics of Patients with Major Depressive Disorder on Military Service and Conscription Issues Using K-WAIS-IV : A Retrospective Study

Jiyoung Kim, MA; and Eunhee Park, PhD

Department of Psychiatry, Hallym Sacred Heart Hospital, Seoul, Korea

Objective : The purpose of this study was to investigate the cognitive performance of major depressive disorder (MDD) in military service/conscription personnel who visited the psychiatric clinic for a medical certificate to consider the situation from the perspective of Korea's unique compulsory military system. We used the Korean Wechsler Adult Intelligence Scale-IV (K-WAIS-IV) as the test for verifying the suitable level of cognitive functioning for military service and as the embedded measure with reflecting sub-optimal effort.

Methods : The study was conducted on 56 (28 males, age 19-34) in/out-patients admitted to the psychiatry department and diagnosed with MDD (DSM-IV). All participants completed a structured clinical interview (MINI-Plus), as well as self-report questionnaires related to demographics and severity of clinical symptoms. K-WAIS-IV was administered to each subject to assess cognitive characteristics.

Results : Military group showed significantly lower processing speed index (PSI) score including sub-tests of symbol search (SS) and coding (CD) score, compared to the control group. There was no other significant differences in the Full Scale IQ (FSIQ), Verbal Comprehension Index (VCI), Perceptual Reasoning Index (PRI), Working Memory Index (WMI) scores including sub-tests comprised of the above indices, and Reliable Digit Span (RDS), Enhanced-RDS-Revised (E-RDS-R) between the study and control groups.

Conclusion : This study was the first effort to verify the characteristics of Korea's military group with MDD and suggest the applicability of PSI and processing speed of K-WAIS-IV as an embedded performance index to test sub-optimal effort or low motivation beyond the purpose of testing cognitive deficits.

Key words : Military examination;Depression;K-WAIS-IV;Cognitive functioning;Faking bad;Performance validity.

Anxiety and Mood

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