Dataset Information

The Portuguese Rheumatoid Arthritis Impact of Disease (RAID) score and its measurement equivalence in three countries: validation study using Rasch Models.

ABSTRACT:

Purpose

The Rheumatoid Arthritis Impact of Disease (RAID) score assesses seven impact domains of interest for people with RA. This study aimed to test patients' understanding of the Portuguese RAID and evaluate its cross-cultural validity for use in Portugal.

Methods

This was a mixed methods study comprising two phases: (i) cognitive debriefing to determine patient's comprehension of the Portuguese RAID and (ii) cross-cultural validation using Rasch analysis. Construct validity was determined by fit to the model, invariance culture (compared with France and UK datasets) and evidence of convergent and divergent validity.

Results

Patients' input (n?=?38) led to minor changes in the phrasing of two items to ensure conceptual equivalence between the Portuguese and the original RAID. In Rasch analysis (n?=?288), two items 'Sleep' and 'Physical well-being' in the Portuguese dataset did not adequately fit the model specifications, suggesting multidimensionality (sleep-not necessarily associated with RA) and redundancy (physical well-being overlapping with functional disability). Despite the imperfections, the scale had high internal consistency, evidence of convergent and divergent validity and invariance to culture (compared to France n?=?195 and UK n?=?205 datasets). The scale was well targeted for patients with different levels of disease impact.

Conclusions

The RAID has been successfully adapted into Portuguese and it can be used with confidence in clinical practice. Further research will be required to ensure it captures the full range of sleep problems in RA. Meanwhile, data across the three countries (Portugal, France and the UK) are comparable except for the two items (sleep and physical well-being).

SUBMITTER: Ferreira RJO

PROVIDER: S-EPMC6208571 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Publications

The Portuguese Rheumatoid Arthritis Impact of Disease (RAID) score and its measurement equivalence in three countries: validation study using Rasch Models.

Ferreira Ricardo J O RJO Gossec Laure L Duarte Cátia C Nicklin Joanne K JK Hewlett Sarah S da Silva J A P JAP Ndosi Mwidimi M

Quality of life research : an international journal of quality of life aspects of treatment, care and rehabilitation 20180801 11

<h4>Purpose</h4>The Rheumatoid Arthritis Impact of Disease (RAID) score assesses seven impact domains of interest for people with RA. This study aimed to test patients' understanding of the Portuguese RAID and evaluate its cross-cultural validity for use in Portugal.<h4>Methods</h4>This was a mixed methods study comprising two phases: (i) cognitive debriefing to determine patient's comprehension of the Portuguese RAID and (ii) cross-cultural validation using Rasch analysis. Construct validity wa ...[more]

PMID: 30069794

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Dataset Information

The Portuguese Rheumatoid Arthritis Impact of Disease (RAID) score and its measurement equivalence in three countries: validation study using Rasch Models.

Purpose

Methods

Results

Conclusions

Publications

The Portuguese Rheumatoid Arthritis Impact of Disease (RAID) score and its measurement equivalence in three countries: validation study using Rasch Models.

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