A Validation Study for the Korean Version of Delirium Rating Scale-Revised-98 (K-DRS-98) / 신경정신의학

ABSTRACT

OBJECTIVE: This study was conducted to develop and to validate the Korean version of Delirium Rating Scale-Revised-98 (K-DRS-98), which is a scale for diagnosing delirium and evaluating its severity. METHOD: After developing the K-DRS-98, 102 patients were rated by it among 4 diagnostic groups, such as delirium (N=25), dementia (N=27), schizophrenia (N=25) and others (N=25). To test for reliability, K-DRS-98 was independently administered by two psychiatrist. To test for validity, Korean version of Mini-Mental State Examination (MMSE-K) and Clinical Global Impression (CGI) were administered simultaneously. Statistical analysis was done with SPSS window version 12 package and statistical significance was p<0.05. RESULT: Internal consistencies (Cronbach alpha) of two raters were 0.867 and 0.858, respectively. Inter-rater reliability (kappa) was 0.893 for severity items of K-DRS-98 and kappa value of diagnosis items was 0.969. In Delirium group, Pearson correlation coefficients (gamma) of K-DRS-98 were -0.682 for MMSE-K and 0.667 for CGI. In comparison Delirium group with Others, ANOVA post hoc multiple comparison LSD was statistically significant (p<0.001). The cutoff score to diagnosis of delirium can be recommended 16 for severity items and 21.5 for total score, respectively. CONCLUSION: The K-DRS-98 was showed good reliability and validity for the assessment of delirium. The K-DRS-98 is an easy and useful tool for diagnosing delirium and assessing its severity.