Development and evaluation of a short version of the quality of life questionnaire for dementia

Seishi Terada, Etsuko Oshima, Chikako Ikeda, Satoshi Hayashi, Osamu Yokota, Yosuke Uchitomi

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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 languageEnglish
Pages (from-to)103-110
Number of pages8
JournalInternational Psychogeriatrics
Issue number1
Publication statusPublished - Jan 12 2015


  • dementia
  • factor analysis
  • health-related QOL
  • quality of life (QOL)

ASJC Scopus subject areas

  • Clinical Psychology
  • Gerontology
  • Geriatrics and Gerontology
  • Psychiatry and Mental health


Dive into the research topics of 'Development and evaluation of a short version of the quality of life questionnaire for dementia'. Together they form a unique fingerprint.

Cite this