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ArticleQuality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation2019

Psychometric properties and cross-language equivalence of the revised Bristol Rheumatoid Arthritis Fatigue and the Rheumatoid Arthritis Impact of Disease scales in rheumatoid arthritis.

Martijn A H Oude Voshaar, Christina Bode, Sarah Hewlett, John Kirwan, Laure Gossec, Mart A F J van de Laar

Open access · hybridAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 1 pooled it
0.2field-weighted citation impact, top 46% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 1 synthesis or guideline pooled it, 3 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 3 countries.

Martijn A H Oude VoshaarDepartment of Psychology, Health and Technology, University of Twente, PO BOX 50 000, 7500 KA, Enschede, The Netherlands. A.H.Oudevoshaar@utwente.nl.ORCID http://orcid.org/0000-0003-2438-9973
Christina BodeDepartment of Psychology, Health and Technology, University of Twente, PO BOX 50 000, 7500 KA, Enschede, The Netherlands.
Sarah HewlettUniversity of West England, Bristol, UK.
John KirwanUniversity of West England, Bristol, UK.
Laure GossecSorbonne Université, Paris, France.
Mart A F J van de LaarDepartment of Psychology, Health and Technology, University of Twente, PO BOX 50 000, 7500 KA, Enschede, The Netherlands.
University of the West of England · GBUniversity of Twente · NLMedisch Spectrum Twente · NLSorbonne Université · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo assess psychometric properties and cross-language measurement equivalence of six versions of the Bristol Rheumatoid Arthritis Fatigue Scale (BRAF-MDQ) and the Rheumatoid Arthritis Impact of Disease Score (RAID in rheumatoid arthritis (RA).

methodsBoth questionnaires were completed by French (n = 206), German (n = 206), Dutch (n = 317), Spanish (n = 157), Swedish (n = 170) and UK (n = 210) RA patients. The presence of cross-language differential item functioning (DIF) was examined using the generalized partial credit model. The impact of DIF on the item and total scores was examined by comparing DIF unadjusted and DIF adjusted expected item and scale scores. IRT-based methods were used to assess psychometric properties of the instruments.

results11 of the 20 BRAF-MDQ (55%) and 4 of the 7 RAID items (57%) exhibited significant DIF in at least one of the six countries. The mean number of items with DIF per country was 2.6 for BRAF-MDQ and 1.1 for RAID. However, the impact of DIF on the total RAID and BRAF-MDQ scores, as well as the BRAF subscales, was found to be negligible at the group level. Only for the BRAF physical subscale was there evidence of minor DIF. Marginal reliabilities of BRAF-MDQ (0.93) and RAID (0.89) were excellent, and precise scores could be obtained across the spectrum of disease impact and fatigue scores measured by these PROMs.

conclusionThis study supports the cross-language measurement equivalence of BRAF-MDQ and RAID and provides further support for the psychometric properties of these measures in RA.

Indexed as

AdultArthritis, RheumatoidFatigueFemaleHumansLanguageMaleMiddle AgedPsychometricsQuality of LifeSurveys and QuestionnairesSwedenTranslationsDifferential item functioningDisease impactFatigueItem response theoryPatient reported outcomeReliabilityRheumatoid arthritisValidity

Identifiers

PMID31028510
PMCPMC6698264
OpenAlexW2941319480

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.