J Korean Geriatr Psychiatry.  2016 Oct;20(2):108-113. 10.0000/jkgp.2016.20.2.108.

Influence of Depression on the Prediction Accuracy of Mini-Mental State Examination as Screening Test for Early Detection of Dementia

• Kim SB
• Lee JJ
• Lee SB
• Lee KK
• Paik KC

• KMID: 2358090
• DOI: http://doi.org/10.0000/jkgp.2016.20.2.108

Abstract

OBJECTIVE
Depression and cognitive impairment are closely associated in old age. In this study, we investigate the influence of depression on the prediction accuracy of Mini-Mental State Examination (MMSE) as screening test for early detection of dementia.
METHODS
Three hundred and twenty one dementia patients and five hundred and thirty five normal control subjects were enrolled in this study. We administered both the Mini International Neuropsychiatric Inventory and the Korean version of the Consortium to Establish a Registry for Alzheimer's Disease Assessment Packet clinical and neuropsychological battery. We diagnosed depressive disorders according to the Diagnostic and Statistical Manual of Mental Disorders, fourth edition diagnostic criteria, and evaluated the severity of depressive symptoms using the revised Korean version of the Geriatric Depression Scale. Subjects were divided into two groups : 1) depressed group, 2) non-depressed group. We compared sensitivity, specificity, positive predictive value, negative predictive value, receiver operating characteristic curve, and areas of under the curve (AUC) of MMSE between two groups.
RESULTS
AUC of total group was 0.803 [95% confidence interval (CI)=0.774-0.833]. AUC of non-depressed group was the higher (0.855 ; 95% CI=0.823-0.887) than that of depressed group (0.767 ; 95% CI=0.710-0.824, p<0.009).
CONCLUSION
In non-depressed group, diagnostic accuracy and positive predictive value were higher than those of depressed group. Depression should be considered for effective and efficient national dementia screening and registry program.

Keyword

Depression; Screening; Dementia; Mini-Mental State Examination; Positive predictive value

MeSH Terms

Alzheimer Disease
Area Under Curve
Cognition Disorders
Dementia*
Depression*
Depressive Disorder
Diagnostic and Statistical Manual of Mental Disorders
Humans
Mass Screening*
ROC Curve
Sensitivity and Specificity