Rheumatology Medical News about clinimetric proerties;early inflammatory arthritis;comorbidity questionaire

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Evaluation of the clinimetric properties of the Early Inflammatory Arthritis—self-administered comorbidity questionnaire
Rheumatology, 04/07/09

Baron M et al. - Study demonstrates that the Early Inflammatory Arthritis- self-administered comorbidity questionnaire (EIA-SCQ) is reliable and valid for use in EIA; has the potential to become a useful measure of comorbidity in outcome studies of EIA.

Methods

Aim was to assess the clinimetric properties of EIA-SCQ in EIA
320 pts; were administered:
- EIA-SCQ and indices of disease activity, function
- pain, health-related quality of life (HRQoL)
- and health resource utilization
20 pts completed the EIA-SCQ a second time 1 wk later
Construct validity was evaluated by testing the hypotheses that:
- a valid comorbidity index would correlate well with age
- weakly with HRQoL and recent resource utilization
- and poorly with indices of disease activity, function and pain

Results

Intra-class correlation coefficient between repeat scores was 0.93
Kappa values for individual items ranged from 0.64 to 1.0
EIA-SCQ scores correlated moderately with age, and weakly with function, pain, some measures of HRQoL, and a measure of resource utilization
EIA-SCQ did not correlate with other measures of disease activity, another HRQoL measure or other measures of resource utilization

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