Abstract
Background: There are many quality of life (QOL) instruments for evaluating dementia patients. The QOL questionnaire for Dementia (QOL-D) is one of such instruments and a validated objective measure of QOL for patients with dementia. It comprises 31 items encompassing six domains. However, with 31 items, its length is a disadvantage. The purpose of this study was to develop a short version of QOL-D (short QOL-D). Methods: We used data from two studies. The participants were 264 inpatients with dementia in the first sample and 395 outpatients at a memory clinic in the second sample. We used maximum likelihood factor analysis with promax rotation to reduce the number of items. Results: We produced a nine-item version of QOL-D (short QOL-D) with positive (six items) and negative (three items) dimensions. The correlation coefficients of short and total versions of QOL-D were 0.892-0.918 for total scores, 0.903-0.936 for positive dimension scores, and 0.788-0.837 for negative dimension scores. Total short QOL-D scores showed a significant correlation to the Geriatric Depression Scale score and the apathy score of the Neuropsychiatric Inventory. Conclusions: The short QOL-D produced results comparable with that of the full version. Reducing the number of items may make administration of the instrument easier.
| Original language | English |
|---|---|
| Pages (from-to) | 103-110 |
| Number of pages | 8 |
| Journal | International Psychogeriatrics |
| Volume | 27 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Jan 12 2015 |
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Keywords
- dementia
- factor analysis
- health-related QOL
- quality of life (QOL)
ASJC Scopus subject areas
- Geriatrics and Gerontology
- Psychiatry and Mental health
- Gerontology
- Clinical Psychology
- Medicine(all)
Cite this
Development and evaluation of a short version of the quality of life questionnaire for dementia. / Terada, Seishi; Oshima, Etsuko; Ikeda, Chikako; Hayashi, Satoshi; Yokota, Osamu; Uchitomi, Yosuke.
In: International Psychogeriatrics, Vol. 27, No. 1, 12.01.2015, p. 103-110.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Development and evaluation of a short version of the quality of life questionnaire for dementia
AU - Terada, Seishi
AU - Oshima, Etsuko
AU - Ikeda, Chikako
AU - Hayashi, Satoshi
AU - Yokota, Osamu
AU - Uchitomi, Yosuke
PY - 2015/1/12
Y1 - 2015/1/12
N2 - Background: There are many quality of life (QOL) instruments for evaluating dementia patients. The QOL questionnaire for Dementia (QOL-D) is one of such instruments and a validated objective measure of QOL for patients with dementia. It comprises 31 items encompassing six domains. However, with 31 items, its length is a disadvantage. The purpose of this study was to develop a short version of QOL-D (short QOL-D). Methods: We used data from two studies. The participants were 264 inpatients with dementia in the first sample and 395 outpatients at a memory clinic in the second sample. We used maximum likelihood factor analysis with promax rotation to reduce the number of items. Results: We produced a nine-item version of QOL-D (short QOL-D) with positive (six items) and negative (three items) dimensions. The correlation coefficients of short and total versions of QOL-D were 0.892-0.918 for total scores, 0.903-0.936 for positive dimension scores, and 0.788-0.837 for negative dimension scores. Total short QOL-D scores showed a significant correlation to the Geriatric Depression Scale score and the apathy score of the Neuropsychiatric Inventory. Conclusions: The short QOL-D produced results comparable with that of the full version. Reducing the number of items may make administration of the instrument easier.
AB - Background: There are many quality of life (QOL) instruments for evaluating dementia patients. The QOL questionnaire for Dementia (QOL-D) is one of such instruments and a validated objective measure of QOL for patients with dementia. It comprises 31 items encompassing six domains. However, with 31 items, its length is a disadvantage. The purpose of this study was to develop a short version of QOL-D (short QOL-D). Methods: We used data from two studies. The participants were 264 inpatients with dementia in the first sample and 395 outpatients at a memory clinic in the second sample. We used maximum likelihood factor analysis with promax rotation to reduce the number of items. Results: We produced a nine-item version of QOL-D (short QOL-D) with positive (six items) and negative (three items) dimensions. The correlation coefficients of short and total versions of QOL-D were 0.892-0.918 for total scores, 0.903-0.936 for positive dimension scores, and 0.788-0.837 for negative dimension scores. Total short QOL-D scores showed a significant correlation to the Geriatric Depression Scale score and the apathy score of the Neuropsychiatric Inventory. Conclusions: The short QOL-D produced results comparable with that of the full version. Reducing the number of items may make administration of the instrument easier.
KW - dementia
KW - factor analysis
KW - health-related QOL
KW - quality of life (QOL)
UR - http://www.scopus.com/inward/record.url?scp=84927664422&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84927664422&partnerID=8YFLogxK
U2 - 10.1017/S1041610214001811
DO - 10.1017/S1041610214001811
M3 - Article
C2 - 25162434
AN - SCOPUS:84927664422
VL - 27
SP - 103
EP - 110
JO - International Psychogeriatrics
JF - International Psychogeriatrics
SN - 1041-6102
IS - 1
ER -