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Refinement and revalidation of the demoralization scale: The DS‐II—internal validity

Overview of attention for article published in Cancer (0008543X), May 2016
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  • In the top 25% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (88th percentile)
  • Good Attention Score compared to outputs of the same age and source (70th percentile)

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Title
Refinement and revalidation of the demoralization scale: The DS‐II—internal validity
Published in
Cancer (0008543X), May 2016
DOI 10.1002/cncr.30015
Pubmed ID
Authors

Sophie Robinson, David W Kissane, Joanne Brooker, Natasha Michael, Jane Fischer, Michael Franco, Courtney Hempton, Merlina Sulistio, Julie F Pallant, David M Clarke, Susan Burney

Abstract

The Demoralization Scale (DS) was initially validated in 2004 to enable the measurement of demoralization in patients with advanced cancer. Subsequent shortcomings indicated the need for psychometric strengthening. Here, the authors report on the refinement and revalidation of the DS to form the DS-II, specifically reporting the scale's internal validity. Patients with cancer or other progressive diseases who were receiving palliative care (n = 211) completed a revised version of the 24-item DS and a measure of symptom burden (the Memorial Symptom Assessment Scale). Exploratory factor analysis and Rasch modeling were used to evaluate, modify, and revalidate the scale, providing information about dimensionality, suitability of response format, item fit, item bias, and item difficulty. Test-retest reliability was examined for 58 symptomatically stable patients at a 5-day follow-up. Exploratory factor analysis supported a 22-item, 2-component model. Separate Rasch modeling of each component resulted in collapsing the response option categories and removing 3 items from each component. Both final 8-item subscales met Rasch model expectations and were appropriate to sum as a 16-item total score. The DS-II demonstrated internal consistency and test-retest reliability (Meaning and Purpose subscale: α = .84; intraclass correlation [ICC] = 0.68; Distress and Coping Ability subscale: α = .82; ICC = 0.82; total DS: α = .89; ICC = 0.80). The DS-II is a 3-point response, self-report scale comprising 16 items and 2 subscales. Given its revalidation, psychometric strengthening, and simplification, the DS-II is an improved and more practical measure of demoralization for research and clinical use. External validation of the DS-II will be reported subsequently. Cancer 2016. © 2016 American Cancer Society.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 65 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 65 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 10 15%
Student > Bachelor 9 14%
Researcher 7 11%
Other 5 8%
Student > Ph. D. Student 5 8%
Other 8 12%
Unknown 21 32%
Readers by discipline Count As %
Psychology 12 18%
Medicine and Dentistry 9 14%
Nursing and Health Professions 7 11%
Neuroscience 2 3%
Business, Management and Accounting 1 2%
Other 6 9%
Unknown 28 43%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 17. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 05 October 2017.
All research outputs
#2,199,982
of 25,394,764 outputs
Outputs from Cancer (0008543X)
#1,855
of 14,100 outputs
Outputs of similar age
#36,051
of 326,318 outputs
Outputs of similar age from Cancer (0008543X)
#48
of 160 outputs
Altmetric has tracked 25,394,764 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 91st percentile: it's in the top 10% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 14,100 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 15.4. This one has done well, scoring higher than 86% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 326,318 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 88% of its contemporaries.
We're also able to compare this research output to 160 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 70% of its contemporaries.