Objectives: Peripheral manifestations (peripheral arthritis/enthesitis/dactylitis) are frequent in axial spondyloarthritis (axSpA) yet, understudied. We (i) evaluated the assessment/reporting of peripheral manifestations in trials of biological or targeted synthetic DMARDs (b/tsDMARDs) for axSpA and peripheral SpA (pSpA), and (ii) synthesized the efficacy of b/tsDMARDs on these manifestations. Methods: Systematic literature review (SLR) of controlled trials evaluating b/tsDMARDs in axSpA/pSpA (excluding psoriatic arthritis). Records were identified through previous SLRs informing ASAS-EULAR recommendations and updated searches. Outcomes included (i) frequency of assessment/reporting of peripheral arthritis/enthesitis/dactylitis and (ii) treatment efficacy of b/tsDMARDs on these peripheral manifestations [standardized mean differences (SMDs) or relative risk]. Results: We included 100 axSpA and four pSpA trials. In axSpA, peripheral arthritis was assessed in 54%, enthesitis in 64% and dactylitis in only 10% of studies. When assessed, results were reported in 69%, 72% and 10% of studies, respectively, and often in all patients (instead of those affected at baseline). Most frequently used instruments were 44-joint count for peripheral arthritis (48%), Maastricht Ankylosing Spondylitis Enthesitis Score for enthesitis (88%) and digit count for dactylitis (40%). Composite indices like DAS were not used. SMDs (range 0.26 to -1.18) indicated mainly small-to-moderate b/tsDMARD effects, typically higher in patients with baseline peripheral involvement. In pSpA, peripheral manifestations were always assessed/reported, with generally moderate effects (SMD range -0.10 to -1.22). Conclusion: Peripheral manifestations are inconsistently assessed and reported in axSpA trials. While b/tsDMARDs have small-to-moderate effects on peripheral manifestations, these may be underestimated due to not being assessed in the population affected at baseline.
Webers, C., Ortolan, A., Nikiphorou, E., Sepriano, A., Falzon, L., López-Medina, C., Capelusnik, D., Van Der Heijde, D., Moltó, A., Ramiro, S., Peripheral manifestations in spondyloarthritis: a systematic literature review on their assessment and the effect of biological/targeted synthetic DMARDs, <<RHEUMATOLOGY>>, 2026; (65): 1-9 [https://hdl.handle.net/10807/341614]
Peripheral manifestations in spondyloarthritis: a systematic literature review on their assessment and the effect of biological/targeted synthetic DMARDs
Ortolan, Augusta;
2026
Abstract
Objectives: Peripheral manifestations (peripheral arthritis/enthesitis/dactylitis) are frequent in axial spondyloarthritis (axSpA) yet, understudied. We (i) evaluated the assessment/reporting of peripheral manifestations in trials of biological or targeted synthetic DMARDs (b/tsDMARDs) for axSpA and peripheral SpA (pSpA), and (ii) synthesized the efficacy of b/tsDMARDs on these manifestations. Methods: Systematic literature review (SLR) of controlled trials evaluating b/tsDMARDs in axSpA/pSpA (excluding psoriatic arthritis). Records were identified through previous SLRs informing ASAS-EULAR recommendations and updated searches. Outcomes included (i) frequency of assessment/reporting of peripheral arthritis/enthesitis/dactylitis and (ii) treatment efficacy of b/tsDMARDs on these peripheral manifestations [standardized mean differences (SMDs) or relative risk]. Results: We included 100 axSpA and four pSpA trials. In axSpA, peripheral arthritis was assessed in 54%, enthesitis in 64% and dactylitis in only 10% of studies. When assessed, results were reported in 69%, 72% and 10% of studies, respectively, and often in all patients (instead of those affected at baseline). Most frequently used instruments were 44-joint count for peripheral arthritis (48%), Maastricht Ankylosing Spondylitis Enthesitis Score for enthesitis (88%) and digit count for dactylitis (40%). Composite indices like DAS were not used. SMDs (range 0.26 to -1.18) indicated mainly small-to-moderate b/tsDMARD effects, typically higher in patients with baseline peripheral involvement. In pSpA, peripheral manifestations were always assessed/reported, with generally moderate effects (SMD range -0.10 to -1.22). Conclusion: Peripheral manifestations are inconsistently assessed and reported in axSpA trials. While b/tsDMARDs have small-to-moderate effects on peripheral manifestations, these may be underestimated due to not being assessed in the population affected at baseline.
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