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Detailed analysis of error patterns in the number‐transcoding task on the J apanese version of the R apid D ementia S creening T est
Author(s) -
Moriyama Yasushi,
Yoshino Aihide,
Muramatsu Taro,
Mimura Masaru
Publication year - 2017
Publication title -
psychogeriatrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.647
H-Index - 32
eISSN - 1479-8301
pISSN - 1346-3500
DOI - 10.1111/psyg.12207
Subject(s) - transcoding , task (project management) , medicine , audiology , statistics , mathematics , management , economics
Aim The number‐transcoding task on the J apanese version of the R apid D ementia S creening T est requires mutual conversion between A rabic and C hinese numerals (e.g. 209 → 二百九, 4054 → 四千五十四, 六百八十一 → 681, 二千二十七 → 2027). During this task, some characteristic errors have been seen among patients with A lzheimer's disease ( AD ). The objective of this study was to clarify whether the frequency of appearance of error patterns differs between patients with mild and severe AD according to C linical D ementia R ating ( CDR ) scores. Methods A total of 250 patients with AD were recruited and subsequently categorized into two groups based on CDR scores (mild AD : CDR of 0.5 or 1; severe AD : CDR of 2 or 3). We analyzed 19 qualitative error patterns, including 15 that had been reported to date and 4 previously unreported errors, in each subtest. Results The frequency of appearance of two previously reported and four previously unreported errors in the mild and severe AD groups, respectively, were statistically significant. Conclusions Characteristic error pattern distributions in number transcoding can be observed in patients with mild and severe AD according to CDR scores and offers useful information for interpreting cognitive screening data.