Vasculitis & polymyalgia rheumatica

Outcomes during and after long-term tocilizumab treatment in patients with giant cell arteritis

RMD OpenPublished Retrospective cohort study

Main finding · Relapse during and after TCZResult — go to the resultMultivariable aHR for relapse 0.01 95% CI 0.00–0.28

Authors' conclusion

Long-term TCZ treatment was associated with remission maintenance in most patients with GCA. The estimated relapse rate by 18 months after TCZ discontinuation was 47.3%.

Study context

Population
Giant cell arteritis (GCA) patients treated with tocilizumab (TCZ) at a single centre (2010–2022)mean follow-up 3.1 years
Participants
65 patients
Exposure
Periods on vs off TCZ; TCZ beyond 12 months vs stopping at or before 12 months
Outcome
Time to relapse and annualised relapse rate during and after TCZ treatment
Methodological detailssingle-centre
  • Single-centre

Main finding

Relapse during and after TCZ

Multivariable aHR for relapse

0.01

95% CI 0.00–0.28

P = 0.005

As reported in the abstract

Kaplan-Meier (KM)-estimated relapse rate at 18 months on TCZ
15.5%
KM-estimated relapse rate at 18 months after TCZ discontinuation
47.3%
Adjusted annualised relapse rate, all periods on TCZ
0.1 (95% CI 0.1 to 0.2)
Adjusted annualised relapse rate, all periods off TCZ (95% CI 0.3 to 0.7); p=0.0004 vs on TCZ
0.4

Observational data: associations, not effects.

Further findings

First TCZ course discontinued for satisfactory remission

Patients
45 (69.2%)

Prednisone discontinued

Patients
76.9%

Patients receiving >1 TCZ course

Patients
13

Safety

Serious adverse events

13 serious AEs in patients
11 (16.9%)

First TCZ course discontinued due to adverse events

Patients
6 (9.2%)

Original publication

Outcomes during and after long-term tocilizumab treatment in patients with giant cell arteritis. RMD Open. Published 6 April 2023. doi:10.1136/rmdopen-2022-002923

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