Rheumatology International

, Volume 32, Issue 3, pp 749–757

Effects of long-term corticosteroid usage on functional disability in patients with early rheumatoid arthritis, regardless of controlled disease activity

  • Eiichi Tanaka
  • Ajitha Mannalithara
  • Eisuke Inoue
  • Noriko Iikuni
  • Atsuo Taniguchi
  • Shigeki Momohara
  • Gurkirpal Singh
  • Hisashi Yamanaka
Original Article

DOI: 10.1007/s00296-010-1638-4

Cite this article as:
Tanaka, E., Mannalithara, A., Inoue, E. et al. Rheumatol Int (2012) 32: 749. doi:10.1007/s00296-010-1638-4

Abstract

We investigated the effect of long-term corticosteroid usage in suppressing the progression of functional disability in patients with early rheumatoid arthritis (RA). We studied 3,982 RA patients, who had continuous enrollment for at least 3 years, among 9,132 RA patients enrolled in an observational cohort study, IORRA, in Tokyo, Japan, from 2000 to 2007. The DAS28 and Japanese version of Health Assessment Questionnaire (J-HAQ) scores were collected at 6-month intervals (each phase). Among these patients, those with DAS28 values under 3.2 in all phases and RA disease duration under 2 years at study entry were selected as “early RA patients with well-controlled disease”. These patients were further classified into 3 groups based on average months of steroid usage per year: Non-users, Medium-users, and Frequent-users. Multiple linear regression analysis was used to study the relationship between steroid usage and the final J-HAQ scores. Among the 3,982 patients, 109 had DAS28 values under 3.2 in all the phases and were selected as study cohort. The average Final J-HAQ in Non-user (N = 64), in Medium-user (N = 25), in Frequent-user group (N = 20) was 0.04, 0.06, and 0.33, respectively. Multiple linear regression analysis after adjusting for all potential covariates confirmed that frequent steroid usage was the most significant factor associated with higher final J-HAQ scores (P < 0.05). Frequent steroid usage was associated with significantly higher final J-HAQ scores in early RA patients, even though their disease was managed efficiently by maintaining the DAS28 values under 3.2 over a long-term period.

Keywords

CorticosteroidRheumatoid arthritisDisabilityDisease activity scoreHealth assessment questionnaireCohort studies

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Eiichi Tanaka
    • 1
    • 2
    • 3
  • Ajitha Mannalithara
    • 1
    • 2
  • Eisuke Inoue
    • 3
  • Noriko Iikuni
    • 3
  • Atsuo Taniguchi
    • 3
  • Shigeki Momohara
    • 3
  • Gurkirpal Singh
    • 1
    • 2
  • Hisashi Yamanaka
    • 3
  1. 1.Division of Gastroenterology and HepatologyStanford University School of MedicineStanfordUSA
  2. 2.Institute of Clinical Outcomes Research and EducationPalo AltoUSA
  3. 3.Institute of RheumatologyTokyo Women’s Medical UniversityShinjuku-ku, TokyoJapan