Mortality in Patients with Interstitial Lung Disease Treated with Rituximab or TNFi as a First Biologic

Katie Druce, K. Iqbal, Kath Watson, Deborah Symmons, BSRBR-RA Investigators Group, Kimme Hyrich, C Kelly

Research output: Contribution to journalArticlepeer-review

Abstract

Objectives:
Guidelines cautioned prescribing of tumour necrosis factor inhibitors (TNFi) to patients with
rheumatoid arthritis and interstitial lung disease (RA-ILD) after reports of new or worsening of ILD.
Less is known about outcomes among RA-ILD patients who receive rituximab (RTX). This study
compares mortality in patients with RA-ILD who received RTX or TNFi as their first biologic.

Methods:
Participants with RA-ILD recruited to the British Society for Rheumatology Biologics Register for RA
were included. Death rates were calculated and risk comparisons were made using Cox regression.
Causes of death, including the frequency in which ILD was recorded on death certificates were
examined.
Results:
43 RTX and 309 TNFi patients were included. RTX recipients had shorter disease duration and less
disability. Death rates were 94.8 (95%CI:74.4-118.7) and 53.0 (22.9-104.6) per 1000 pyrs, respectively. The adjusted mortality risk was halved in the RTX cohort, but the difference was not
statistically significant (HR 0.53, 95%CI:0.26-1.10). ILD was the underlying cause of death in 1 of 7 RTX deaths (14%) and 12 of 76 TNFi deaths (16%).

Conclusions:
Patients with RA-ILD who received RTX had lower mortality rates compared to TNFi. Absence of information on ILD severity or subtype prevents conclusions of which drug represents the best
choice in patients with RA-ILD and active arthritis.
Original languageEnglish
Article numbere000473
JournalRMD Open
Volume3
Issue number1
DOIs
Publication statusPublished - 1 Jul 2017

Keywords

  • Rheumatoid arthritis
  • DMARDs (biologic)
  • Anti-TNF
  • pulmonary fibrosis

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