Lupus & antiphospholipid syndrome

Cost-Effectiveness of Early vs Delayed Belimumab Treatment for Systemic Lupus Erythematosus

JAMA Netw OpenPublished Economic evaluation

Authors' conclusion

In this economic evaluation of early vs delayed belimumab in biologic-naive patients with active SLE, early initiation was associated with improved health outcomes and reduced costs.

Study context

Population
Modeled cohort of biologic-naive adult systemic lupus erythematosus (SLE) patients with active disease (SLE Disease Activity Index 2000 score >0); mean (SD) age 41 (11) years at belimumab initiationmodeled cohort
Participants
1,000 participants
Comparison
Early vs delayed initiation of intravenous belimumab
Outcome
Total direct medical costs, QALYs, ICER and INMB
Follow-up
15-year horizon
Methodological detailscost-utility analysis, Markov model with monthly cycles, 15-year horizon, US payer perspective, probabilistic sensitivity analyses, deterministic sensitivity analyses
  • Cost-utility analysis
  • Markov model with monthly cycles
  • 15-year horizon
  • US payer perspective
  • Probabilistic sensitivity analyses
  • Deterministic sensitivity analyses

Main finding

As reported in the abstract

QALYs, incremental costs, ICER and INMB per patient
Quality-adjusted life-years (QALYs), incremental costs, incremental cost-effectiveness ratio (ICER) and incremental net monetary benefit (INMB) per patient
incremental QALYs 0.30 QALYs (95% UI −0.42 to 1.39)
QALYs, incremental costs, ICER and INMB per patient
incremental cost -$126 337.12 per patient (95% UI -$910 010.39 to $168 383.94)
Favorable ICER
ICER -$421 123.73 per QALY
At a $50 000 per QALY threshold
mean INMB $141 337.12 (95% UI -$157 997.53 to $925 019.51)
Early initiation preferred in simulations
81.3% (8125 of 10 000 simulations)

Further findings

Deterministic sensitivity analyses: most influential parameters

INMB range by time horizon (1-year to lifetime)
$6351.07 to $156 497.12
INMB range by SRI-4 response OR (1.08 to 3.47)
$69 741.68 to $209 591.09

Original publication

Cost-Effectiveness of Early vs Delayed Belimumab Treatment for Systemic Lupus Erythematosus. JAMA Netw Open. Published 2 February 2026. doi:10.1001/jamanetworkopen.2025.60167

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