Inflammatory myopathies

Subcutaneous immunoglobulin for patients with idiopathic inflammatory myopathies: a real-world, single-centre experience

Rheumatology (Oxford)Published Retrospective cohort study

Authors' conclusion

SCIG is preferred by most patients over IVIG without a substantial increased disease activity or need for additional CS.

Study context

Population
Consecutive patients with IIM transitioned from IVIG to subcutaneous immunoglobulin (SCIG) therapy for >12 months, single centre
Participants
20 patients
Exposure
SCIG vs prior IVIG
Outcome
Patient preference and effectiveness after transition from IVIG to SCIG
Methodological detailssingle-centre, real-world, pre-post comparison (12 months pre- and post-SCIG initiation), Patient preference surveyed using a questionnaire previously used in studies of neuroinflammatory conditions
  • Single-centre
  • Real-world
  • Pre-post comparison (12 months pre- and post-SCIG initiation)
  • Patient preference surveyed using a questionnaire previously used in studies of neuroinflammatory conditions

Main finding

As reported in the abstract

Preferred SCIG over IVIG

78.9%

Observational data: associations, not effects.

Further findings

OutcomePre-SCIGPost-SCIG
Global disease activity (MITAX) · 12 months pre- and post-SCIG initiation3.313.02

Global disease activity (MITAX) · 12 months pre- and post-SCIG initiation

No significant difference

Cumulative steroid doses · 12 months pre- and post-SCIG initiation

No significant difference

Disease flares and changes in immunosuppression

Patients with disease flares
3
Patients escalated in immunosuppression
5
Patients de-escalated in immunosuppressive medications
4

Original publication

Subcutaneous immunoglobulin for patients with idiopathic inflammatory myopathies: a real-world, single-centre experience. Rheumatology (Oxford). Published 5 October 2023. doi:10.1093/rheumatology/kead521

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