A normative study of the disability assessment for dementia in community-dwelling elderly koreans.
OBJECTIVE
We investigated demographic influences on Korean version of Disability Assessment for Dementia (DAD-K) performance and developed normative data for DAD-K.


METHODS
The DAD-K was administered to 2362 normal controls (NCs), 296 patients with mild cognitive impairment (MCI) and 293 patients with Alzheimer's disease (AD). MANOVA and ROC curve analysis were used to compare DAD-K performance and the diagnostic accuracy of DAD-K, respectively. The demographic influence on DAD-K scores was analyzed by multiple linear regression and ANOVA. Normative DAD-K data were calculated using natural logarithmic transformation.


RESULTS
All DAD-K scores were significantly different among groups (p<0.001). Post hoc analysis showed that instrumental activities of daily living (IADL), executive function and DAD-K total scores began to decline significantly in the very mild stage of AD, whereas the basic activities of daily living (BADL) scores began to decline in the mild stage of AD. The area under the ROC curve differentiating MCI or AD from NC was 0.737 and that differentiating AD from MCI or NC was 0.911. IADL and planning and organization scores were influenced by age and education and performance and DAD-K total scores were influenced by education.


CONCLUSIONS
The demographic influences on DAD-K scores are not conspicuous and are mainly limited to the IADL and planning and organization scores. Unitary or minimally stratified norms for a specific population were developed for DAD-K application. Our results suggest that the DAD-K is useful for differentiating NC or MCI from AD but not as powerful for differentiating NC from MCI.
Department of Psychiatry, Kangwon National University School of Medicine, Chuncheon, Republic of Korea.
Jin Hyeong
JH
Jhoo
Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
Yeon Kyung
YK
Chi
Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
Hyo Jung
HJ
Choi
Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea.
Ji Won
JW
Han
Department of Psychiaty, Wonju Severance Christian Hospital, Wonju, Republic of Korea.
Tae Hui
TH
Kim
Department of Psychiatry, Dankook University Hospital, Cheonan, Republic of Korea.
Jung Jae
JJ
Lee
Department of Psychiatry, Dankook University Hospital, Cheonan, Republic of Korea.
Seok Bum
SB
Lee
Department of Neuropsychiatry, Jeju National University Hospital, Jeju, Republic of Korea.
Joon Hyuk
JH
Park
Department of Neuropsychiatry, Kyunggi Provincial Hospital for the Elderly, Yongin, Republic of Korea.
Jong Chul
JC
Youn
Department of Psychiatry, Chungnam National University Hospital, Daejeon, Republic of Korea.
Jeong Lan
JL
Kim
Department of Neuropsychiatry, Konkuk University Hospital, Seoul, Republic of Korea.
Seung-Ho
SH
Ryu
Department of Neuropsychiatry, Seoul National University Hospital, Seoul, Republic of Korea. ; Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea.
Dong Young
DY
Lee
Department of Neuropsychiatry, Seoul National University Bundang Hospital, Seongnam, Republic of Korea. ; Department of Psychiatry, Seoul National University College of Medicine, Seoul, Republic of Korea. ; Department of Brain and Cognitive Sciences, Seoul National University College of Natural Sciences, Seoul, Republic of Korea.
Ki Woong
KW
Kim
Age; Disability Assessment for Dementia; Education; Gender; Korean; Norms