Document Detail

The contribution of assessing forefoot joints in early rheumatoid arthritis patients: Insights from item response theory.
MedLine Citation:
PMID:  22807101     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To evaluate the contribution of assessing forefoot joints to the measurement range and measurement precision of joint counts in early RA using item response theory. METHODS: Baseline measures of tender and swollen joint counts were analysed in 459 early RA patients from the DREAM remission induction cohort. The contribution of forefoot joints was studied by evaluating their effect on the measurement range and measurement precision of measures based on 28-joint counts. In addition, the alignment between the patient and joint distributions was investigated to determine whether the forefoot joints were informative for measuring an early RA patient's joint tenderness or swelling. RESULTS: In total, 233 patients (50.76%) experienced tenderness and 200 patients (43.57%) experienced swelling in ≥ 1 forefoot joint. Forefoot joints were more informative for measuring joint tenderness than joint swelling, but did not significantly improve the measurement range and measurement precision of the 28-joint counts. Furthermore, including forefoot joints did not remove the existing discrepancy between the joint and patient distributions in both joint counts. CONCLUSIONS: Forefoot joints were frequently affected on an individual level, but did not significantly improve the measurement range or precision of 28-joint counts in early RA patients. From a measurement perspective, reduced joint counts are appropriate for use on a population level. The contribution of assessing forefoot joints on an individual level requires further investigation. Additionally, the results should be cross-validated in patients with longer disease duration, to determine whether the pattern of joint involvement is similar in later stages of RA.
Liseth Siemons; Peter M Ten Klooster; Erik Taal; Ina H Kuper; Piet L C M van Riel; Cees A W Glas; Mart A F J van de Laar
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-16
Journal Detail:
Title:  Arthritis care & research     Volume:  -     ISSN:  2151-4658     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101518086     Medline TA:  Arthritis Care Res (Hoboken)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012 by the American College of Rheumatology.
Arthritis Center Twente; Department of Psychology, Health & Technology; University of, Twente, Enschede, the Netherlands.
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