Yanghyun Lee

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OBJECTIVE The aims of the present study were 1) to standardize the validity and reliability of the Korean version of Delirium Rating Scale-Revised-98 (DRS-R98-K) and 2) to establish the optimum cut-off value, sensitivity, and specificity for discriminating delirium from other non-delirious psychiatric conditions. METHODS Using DSM-IV criteria, 157(More)
Recent studies have examined the decision-making ability of schizophrenic patients using the Iowa Gambling Task (IGT). These studies, however, were restricted to the assessment of emotional decision-making. Decision-making depends on cognitive functions as well as on emotion. The purpose of this study was to examine the performance of schizophrenic patients(More)
OBJECTIVE To confirm the existence of the proposed three-core symptom domains in delirium by analyzing a dataset of nondemented adults using selected core symptoms as measured by the Delirium Rating Scale-Revised-98 (DRS-R98) scale. METHODS Exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) of proposed delirium core symptoms were(More)
OBJECTIVES This study documents the incidences of agranulocytosis and neutropenia, and the patterns of incidence of the side effects of long-term clozapine treatment in order to determine an appropriate time to stop the Clozaril Patient Monitoring System (CPMS). METHODS Hematological, demographic, and other data from the CPMS for 6782 patients who took(More)
OBJECTIVE There is no consensus definition for the phenotype of subsyndromal delirium (SSD), a subthreshold state to full delirium. Without an a priori definition we applied advanced analytic techniques to discern SSD. METHOD We pooled Delirium Rating Scale-Revised-98 (DRS-R98) data from 859 DSM-IV diagnosed nondemented delirious adults and nondelirious(More)
OBJECTIVE This study was to investigate the current use of depression rating scales by psychiatrists and clinical psychologists in Korea. METHODS The questionnaires from many psychiatrists and clinical psychologists were included in the analysis. The questionnaire was composed of items about examining the percentage of patients clinically using depression(More)
Principal components analysis applied to the Delirium Rating Scale-Revised-98 contributes to understanding the delirium construct. Using a multisite pooled international delirium database, the authors applied confirmatory factor analysis to Delirium Rating Scale-Revised-98 scores from 859 adult patients evaluated by delirium experts (delirium, N=516;(More)
Objectives. The aim of this non-randomized, single-arm, multi-center, 9-month extension study was to evaluate the maintained efficacy and tolerability of long-acting risperidone injection when we switched to it from previous oral antipsychotics in symptomatically stable patients with schizophrenia or other psychotic disorders. Methods. A total of 98(More)
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