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Determinants of neuropsychiatric flares in patients with systemic lupus erythematosus: results from five phase Ill clinical trials of belimumab
Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Solna, Sweden.
Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Solna, Sweden.
Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Solna, Sweden.
Division of Rheumatology, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Solna, Sweden.
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2023 (English)In: Scandinavian Journal of Rheumatology, ISSN 0300-9742, E-ISSN 1502-7732, Vol. 52, no Suppl. 131, p. 45-45, article id OP33Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Background including aims: Identification of clinical features and serological markers that are predictive of neuropsychiatric systemic lupus erythematosus (NPSLE) would contribute to early detection of NP involvement, early initiation of treatment, and hopefully, improved outcomes. Thus, we aimed to identify determinants of NPSLE flares in patients treated for active SLE yet no ongoing severe NPSLE with non-biologic standard therapy plus belimumab or placebo.

Methods: We analysed data from five phase III trials (BLISS-52, BLISS-76, BLISS-NEA, BLISS-SC, EMBRACE; N=3638) after exclusion of patients with baseline NP BILAG A. Factors associated with NPSLE flare, defined as a new NP BILAG A or B, were investigated using Cox regression. In a subgroup analysis, we studied patients with baseline NP BILAG E for determinants of de novo NPSLE flare. Organ damage was assessed using the SLICC/ACR Damage Index (SDI).

Results: We documented 105 (2.9%) NPSLE flares. In multivariable analysis, male sex (HR=2.37; 95% CI: 1.31–4.28; p=0.004), baseline NP BILAG B–D (HR=5.92; 95% CI: 3.86–9.06; p<0.001), and increasing SDI scores (HR=1.35; 95% CI: 1.21–1.50; p<0.001) were strongly associated with NPSLE flare. Belimumab use yielded no association at any dose or administration form. In analysis of SDI domains, NP damage was the strongest determinant of NPSLE flare (HR=3.25; 95% CI: 2.72–3.88; p<0.001), holding true for cognitive impairment (HR=14.29; 95% CI: 9.22–22.14; p<0.001), transverse myelitis (HR=21.89; 95% CI: 5.40–88.72; p<0.001), and neuropathy (HR=8.87; 95% CI: 5.59–14.09; p<0.001). Male sex was the strongest determinant of de novo NPSLE flare (HR=3.26; 95% CI: 1.51–7.04; p=0.003).

Conclusion: Male sex, NPSLE history, and NP damage were strong determinants of impending NPSLE flare. No clear protection or predisposition was conferred from add-on belimumab.

Place, publisher, year, edition, pages
Taylor & Francis, 2023. Vol. 52, no Suppl. 131, p. 45-45, article id OP33
Keywords [en]
Systemic lupus erythematosus, neuropsychiatric, flares
National Category
Rheumatology and Autoimmunity
Identifiers
URN: urn:nbn:se:oru:diva-109785ISI: 001078522900034OAI: oai:DiVA.org:oru-109785DiVA, id: diva2:1813553
Conference
39th Scandinavian Congress of Rheumatology, Copenhagen, Denmark, August 23-26, 2023
Available from: 2023-11-21 Created: 2023-11-21 Last updated: 2023-11-21Bibliographically approved

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