Rheumatoid arthritis

Long-term mortality in treated-to-target rheumatoid arthritis (RA) and undifferentiated arthritis (UA): results of the BeSt and IMPROVED cohort

Ann Rheum DisPublished Long-term follow-up of two treat-to-target trial cohorts

Authors' conclusion

After long-term treatment-to-target, excess mortality occurred in patients with RA after>10 years since treatment start, with smoking as an important risk factor.

Study context

Population
Patients with early RA or UA in the BeSt and IMPROVED treat-to-target trials; vital status assessed up to 31 December 2021
Participants
508 vs 610
Comparison
BeSt vs IMPROVED
  • BeStn = 508
  • IMPROVEDn = 610
Primary endpoint
Long-term mortality (SMR)
Follow-up
Up to 20 years
Methodological detailsstandardised mortality ratios, stratified analyses for anticitrullinated protein antibody (ACPA) and smoking status
  • Standardised mortality ratios
  • Stratified analyses for ACPA and smoking status

Primary result

As reported in the abstract

All-cause mortality, SMR

BeSt

1.32

95% CI 1.14–1.53

IMPROVED

1.33

95% CI 1.10–1.63

Further findings

Mean survival time shorter than expected

OutcomeBeStIMPROVED
Mortality in ACPA+ patients who smoked, SMR (subgroup)2.80 (95% CI 2.16–3.64)2.14 (95% CI 1.33–3.45)
Mortality per 1 point increase in mean DAS during the trial
HR1.341.13

Cause of death

The main cause of death was malignancy

Original publication

Long-term mortality in treated-to-target RA and UA: results of the BeSt and IMPROVED cohort. Ann Rheum Dis. Published 11 January 2024. doi:10.1136/ard-2023-224814

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