Usefulness of the Geriatric Depression Scale 15-item version among very old people with and without cognitive impairment
2013 (English)In: Aging & Mental Health, ISSN 1360-7863, E-ISSN 1364-6915, Vol. 17, no 5, 81 p.638-645 p.Article in journal (Refereed) Published
Objectives: The aim of this population-based study was to investigate the usefulness of the Geriatric Depression Scale 15-item version (GDS-15) to assess depressive symptoms among very old people with differing levels of cognitive function.
Methods: The 834 participants were aged 85 and over. Feasibility of GDS-15 was evaluated as the proportion of people who completed the scale. Concurrent criterion validity was evaluated by calculating correlations between GDS-15 and Philadelphia Geriatric Center Morale Scale (PGCMS). PGCMS measures psychological wellbeing which is closely related with depressive symptoms. Correlations were calculated within groups according to cognitive function assessed with Mini-Mental State Examination (MMSE); 0-4, 5-9, 10-14, 15-19, 20-24, 25-27, and 28-30, using Pearson's two-sided correlation and compared using Fisher r-to-z transformation. Internal consistency of the GDS-15 was evaluated by calculating Cronbach's in each group.
Results: In total, 651 (78%) of the 834 participants completed the GDS-15. For the two MMSE-groups with scores of <10, the proportion who completed GDS-15 were 1% and 42%, respectively, compared to 65-95% in the MMSE-groups with scores of 10. Cronbach's in each MMSE-group ranged from 0.636 (MMSE 28-30) to 0.821 (MMSE 5-9). The level of correlation between GDS-15 and PGCMS did not significantly differ between MMSE-groups with scores of 5-27 compared to the MMSE-group with scores of 28-30.
Conclusions: The GDS-15 seems to have an overall usefulness to assess depressive symptoms among very old people with an MMSE score of 10 or more. More studies are needed to strengthen the validity of GDS-15 among older people with MMSE scores of 10-14. For older people with MMSE scores lower than 10, there is a need to develop and validate other measurements.
Place, publisher, year, edition, pages
Routledge, 2013. Vol. 17, no 5, 81 p.638-645 p.
depression, aged, 80 years and over, cognitive disorders, validation studies
Research subject Physiotherapy
IdentifiersURN: urn:nbn:se:umu:diva-61438DOI: 10.1080/13607863.2012.758231ISI: 000320913300015ISBN: 978-91-7459-520-8OAI: oai:DiVA.org:umu-61438DiVA: diva2:567865
FunderSwedish Research Council, K2009-69P-21298-01-4Swedish Research Council, K2009-69X-21299-01-1Swedish Research Council, K2005-27VX-15357-01A
This work was supported by grants from the Interreg IIIa Kvarken-MittSkandia Program (2000-2006) and the Bothnia Atlantica Program (2007-2013), both funded by the European Union and the European Regional Development Fund; the Regional Council of Ostrobotnia; the Swedish Research Council K2009-69P-21298-01-4, K2009-69X-21299-01-1, and K2005-27VX-15357-01A, the Erik and Anne-Marie Detlof's Foundation, the Swedish Dementia Foundation, King Gustav V's and Queen Victoria's Freemason's Foundation, the Ragnhild and Einar Lundstrom's Memorial Foundation, the JC Kempe Memorial Foundation, the Strategic Research Programme in Care Sciences in Sweden, and the Umea University Foundations for Medical Research.2012-11-142012-11-142015-04-22Bibliographically approved