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Spondyloarthritis
Original article
Costs of early spondyloarthritis: estimates from the first 3 years of the DESIR cohort
  1. Stephanie Harvard1,2,3,
  2. Daphne Guh2,
  3. Nick Bansback2,3,
  4. Pascal Richette4,5,
  5. Maxime Dougados6,7,8,9,
  6. Aslam Anis1,2 and
  7. Bruno Fautrel3,10
  1. 1University of British Columbia, Vancouver, British Columbia, Canada
  2. 2Centre for Health Evaluation and Outcome Sciences, Vancouver, British Columbia, Canada
  3. 3Sorbonne Universités, UPMC Univ Paris 06, Paris, France
  4. 4Faculty of Medicine, University Paris Diderot, Paris, France
  5. 5AP-HP, Rheumatology Department, Lariboisiere University Hospital, Paris, France
  6. 6AP-HP, Rheumatology B Department, Cochin University Hospital, Paris, France
  7. 7Faculty of Medicine, University Paris Descartes, Paris, France
  8. 8EULAR Center of Excellence
  9. 9Clinical Epidemiology and Biostatistics, INSERM (U1153): PRES Sorbonne Paris-Cité, Paris, France
  10. 10AP-HP, Rheumatology Department, Pitié Salpétrière University Hospital, Paris, France
  1. Correspondence to Dr Stephanie Harvard; harvards{at}mail.ubc.ca

Abstract

Objectives To value health resource utilisation and productivity losses in DESIR, a longitudinal French cohort of 708 patients with early spondyloarthritis (SpA) enrolled between 2007 and 2010, and identify factors associated with costs in the first 3 years of follow-up.

Methods Self-reported clinical data from DESIR and French public data were used to value health resource utilisation and productivity losses in 2013 Euros. Factors associated with costs, including and excluding biological drugs, were identified in generalised linear models using the generalised estimating equations algorithm to account for repeated observations over participants.

Results The mean (±SD) annual cost per patient was €5004±6870 in year 1, decreasing to €4961±7457 in year 3. Patients who never received a biologic had mean 3-year total costs of €4789±6022 compared to €38 206±19 829 among those who received a biologic. Factors associated with increased total costs were peripheral arthritis (rate ratio (RR) 1.19; 95% CI 1.04 to 1.37; p<0.0001), time on biologics (RR 1.23 per month; 1.21, 1.24; p<0.0001), and average BASFI score (RR 1.18/10 point increase; 1.15, 1.25; p<0.0001). Factors associated with increased costs excluding biologics were baseline age (RR 1.10 per 5 year increase; 1.05, 1.16; p<0.0001), peripheral arthritis (RR 1.20; 1.02, 1.40; p<0.0133), time on biologics (RR 1.04 per month; 1.02, 1.05; p<0.0001), and average BASDAI score (RR 1.21 per 10 point increase; 1.16, 1.25; p<0.0001).

Conclusions In addition to biologics, factors like age, peripheral arthritis and disease activity independently increase SpA-related costs. This study may serve as a benchmark for cost of illness among patients with early SpA in the biologic era.

  • Spondyloarthritis
  • Ankylosing Spondylitis
  • Anti-TNF

This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/

https://doi.org/10.1136/rmdopen-2015-000230

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