Prevalence Rates of Dementia and Mild Cognitive Impairment Are Affected by the Diagnostic Parameter Changes for Neurocognitive Disorders in the DSM-5 in a Korean Population.

Aim: To examine the impact of the revised diagnostic criteria for neurocognitive disorders (NCDs) in the Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5) on the prevalence of dementia and mild cognitive impairment (MCI).

Methods: A total of 755 participants aged 65 years or older in the Nationwide Survey on Dementia Epidemiology in Korea 2012 were rediagnosed according to the DSM-5 criteria.

Results: The estimated age-, gender-, education-, and urbanicity-standardized prevalence rates of major and mild NCDs were 8.

Sleep duration and associated factors in a community sample of elderly individuals in Korea.

Background: This study estimates the duration of sleep and its relationships with clinical correlates in a community sample of elderly individuals in Korea.

Methods: A total of 1924 individuals aged 65 and over were interviewed in Korea. Sleep durations were classified into five categories: 5.

Smoking in elderly Koreans: prevalence and factors associated with smoking cessation.

The aims of this study were to investigate the prevalence of smoking and to explore the factors associated with smoking cessation. 1118 Koreans were randomly sampled from the residents aged 65 years or older living in Seongnam, Korea. Structured face-to-face interviews with neurological and physical examinations were conducted to the 714 respondents.

A nationwide survey on the prevalence and risk factors of late life depression in South Korea.

Objective: This study aimed to estimate prevalence rates and risk factors of LLD among a large nationwide sample of Korean elders in South Korea.

Method: Of 8199 randomly sampled Koreans aged 65 years or more, 6018 participated (response rate=73.4%).

Interactive influences of demographics on the Mini-Mental State Examination (MMSE) and the demographics-adjusted norms for MMSE in elderly Koreans.

Background: The influences of demographics, culture, language, and environmental changes on Mini-Mental State Examination (MMSE) scores are considerable.

Methods: Using a sample of 7452 healthy, community-dwelling elderly Koreans, aged 55 to 94 years, who participated in the four ongoing geriatric cohorts in Korea, we investigated demographic influences on MMSE scores and derived normative data for this population. Geropsychiatrists strictly excluded subjects with cognitive disorders according to the protocol of the Korean version of the Consortium to Establish a Registry for Alzheimer's Disease Assessment Packet (CERAD-K) Clinical Assessment Battery (CERAD-K-C).

Normative study of the category fluency test (CFT) from nationwide data on community-dwelling elderly in Korea.

Objectives: We determined the influence of demographic characteristics on the categorical verbal fluency and to provided its' normative data for the community-dwelling elderly with diverse educational attainment.

Methods: We administered the CFT using the animal category to 3025 (1420 men and 1605 women) non-demented community-dwelling Koreans aged 60-96 years who had educational levels ranging from 0 to 22 years.

Results: Age and education were associated significantly with performance of CFT, with education showing the stronger association.

A nationwide survey on the prevalence of dementia and mild cognitive impairment in South Korea.

We investigated the prevalence of dementia and mild cognitive impairment (MCI) and the factors associate with risk of dementia from a representative nationwide sample of Korean elders. 8,199 randomly-sampled Koreans aged 65 years or older were invited to participate in the Phase I screening assessment using Mini-Mental State Examination by door-to-door home visit, and 6,141 subjects (response rate = 74.9%) responded.

Brief screening for mild cognitive impairment in elderly outpatient clinic: validation of the Korean version of the Montreal Cognitive Assessment.

The Montreal Cognitive Assessment (MoCA) is a brief cognitive screening tool with high sensitivity for screening patients with mild cognitive impairment (MCI). The authors examined the validity and reliability of the Korean version of the MoCA (MoCA-K) in elderly outpatients. The MoCA-K, a Korean version of the Mini-Mental State Examination (MMSE), Clinical Dementia Rating (CDR) scale, and neuropsychological batteries were administered to 196 elderly persons (mild Alzheimer's disease [AD] = 44, MCI = 37, normal controls [NC] = 115).

-759 C/T polymorphism of 5-HT2C receptor gene and early phase weight gain associated with antipsychotic drug treatment.

5-HT2C receptor gene is viewed as an important candidate gene in pharmacogenetic studies of antipsychotic drug-induced weight gain. However, inconsistent results have been obtained in different populations. We investigated the association between the -759C/T polymorphism of the 5-HT2C receptor gene with early phase (after 4 weeks of treatment) weight gain induced by antipsychotic treatment in Korean schizophrenia patients.