Body mass index and the rheumatoid arthritis swollen joint count

An observational study

Liron Caplan, Lisa A. Davis, Christina M. Bright, Gail S. Kerr, Deana M. Lazaro, Nasim A. Khan, J. Steuart Richards, Dannette S. Johnson, Grant W. Cannon, Andreas M. Reimold, Ted R Mikuls

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Objective Obesity is a prevalent condition and a serious health concern. The relationship between obesity and rheumatoid arthritis (RA) disease activity and severity has not been adequately examined, and there are concerns that periarticular adipose tissue may reduce the utility of the joint examination. Methods We used a cross-sectional study to compare the performance of swollen joint count (SJC) in subjects with RA across body mass index (BMI) strata. Specifically, regression techniques tested for associations of SJC and 7 RA disease activity/severity measures (including high-sensitivity C-reactive protein level, radiographic changes, and Multidimensional Health Assessment Questionnaire scores) within BMI quartiles. We also evaluated the association of BMI with radiographic evidence of RA in multivariate analyses and the association of BMI with SJC. Clinical and laboratory data from 980 Veterans Affairs Rheumatoid Arthritis registry participants were analyzed using linear and logistic regression. Results Associations were evident between SJC and 6 of the 7 examined RA disease activity/severity measures. SJC predicts RA disease activity/severity in more obese subjects at least as well as in subjects with lower BMIs, and there was a trend toward better performance in individuals with higher BMIs. Subjects with higher BMIs were marginally less likely to be characterized by radiographic changes (odds ratio 0.98, P = 0.051). We found no association between BMI and SJC. Conclusion BMI does not obscure the relationship of SJC and objective disease activity measures. There is a borderline association of higher BMI and the likelihood of radiographic changes characteristic of RA after controlling for clinical characteristics.

Original languageEnglish (US)
Pages (from-to)101-106
Number of pages6
JournalArthritis Care and Research
Volume65
Issue number1
DOIs
StatePublished - Jan 1 2013

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Observational Studies
Rheumatoid Arthritis
Body Mass Index
Joints
Obesity
Health
Veterans
C-Reactive Protein
Registries
Adipose Tissue
Linear Models
Multivariate Analysis
Cross-Sectional Studies
Logistic Models
Odds Ratio

ASJC Scopus subject areas

  • Rheumatology

Cite this

Body mass index and the rheumatoid arthritis swollen joint count : An observational study. / Caplan, Liron; Davis, Lisa A.; Bright, Christina M.; Kerr, Gail S.; Lazaro, Deana M.; Khan, Nasim A.; Richards, J. Steuart; Johnson, Dannette S.; Cannon, Grant W.; Reimold, Andreas M.; Mikuls, Ted R.

In: Arthritis Care and Research, Vol. 65, No. 1, 01.01.2013, p. 101-106.

Research output: Contribution to journalArticle

Caplan, L, Davis, LA, Bright, CM, Kerr, GS, Lazaro, DM, Khan, NA, Richards, JS, Johnson, DS, Cannon, GW, Reimold, AM & Mikuls, TR 2013, 'Body mass index and the rheumatoid arthritis swollen joint count: An observational study', Arthritis Care and Research, vol. 65, no. 1, pp. 101-106. https://doi.org/10.1002/acr.21734
Caplan, Liron ; Davis, Lisa A. ; Bright, Christina M. ; Kerr, Gail S. ; Lazaro, Deana M. ; Khan, Nasim A. ; Richards, J. Steuart ; Johnson, Dannette S. ; Cannon, Grant W. ; Reimold, Andreas M. ; Mikuls, Ted R. / Body mass index and the rheumatoid arthritis swollen joint count : An observational study. In: Arthritis Care and Research. 2013 ; Vol. 65, No. 1. pp. 101-106.
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