Lupus & antiphospholipid syndrome

Early belimumab accelerates renal response and reduces glucocorticoid exposure in lupus nephritis: a multicentre propensity-matched study

Rheumatology (Oxford)Published Retrospective cohort study

Main finding · CRRResult — go to the resultOdds ratio 2.81 95% CI 1.30–6.29

Authors' conclusion

Early belimumab combination therapy accelerates CRR and reduces GC exposure.

Study context

Population
Consecutive adults with biopsy-proven lupus nephritis (LN), Italian lupus referral centrespropensity-matched
Participants
91 vs 91
Exposure
Early belimumab plus standard-of-care (SoC) vs SoC alone
  • Belimumabn = 91
  • SoCn = 91reference
Outcome
CRR (2019 EULAR/EDTA)
Follow-up
6 months
Methodological detailsmulticentre, propensity-score matched, historical control cohort (1990-2016)
  • Multicentre
  • Propensity-score matched
  • Historical control cohort (1990-2016)

Main finding

CRR

Odds ratio

2.81

95% CI 1.30–6.29

P = 0.005

By group

Belimumabvs SoC
OR 2.81 (95% CI 1.30–6.29); P = 0.005

As reported in the abstract

Observational data: associations, not effects.

Further findings

Time to CRR

P < 0.01

GC dose at CRR

P = 0.018

OutcomeHR (95% CI)P value
Independent predictors of earlier CRR (Cox regression)1.70 (1.11–2.62)P = 0.016
Complete renal response (CRR) · 12 months
P = 0.87

CRR · 12 months

Response rates similar

Independent predictors of earlier CRR (Cox regression)

Baseline proteinuria, HR per g/24 h increase 0.89 (95% CI 0.80, 0.98), P = 0.019

Original publication

Early belimumab accelerates renal response and reduces glucocorticoid exposure in lupus nephritis: a multicentre propensity-matched study. Rheumatology (Oxford). Published 25 May 2026. doi:10.1093/rheumatology/keag269

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