Fibrinogen-to-Platelet Ratio and Hematologic Inflammatory Indexes in Spondylarthritis

Spondylarthritis (SA) is characterized by high clinical heterogeneity, often resulting in a discrepancy between systemic inflammation and patient-reported symptoms. This cross-sectional study included 64 patients with spondylarthritis: axial SA (n=32), peripheral SA (n=8), and psoriatic SA (n=24). Clinical assessments included the Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) and Functional Index (BASFI). Systemic inflammation was evaluated via C-reactive protein (CRP), fibrinogen, and calculated ratios (NLR, PLR, MLR, and FPR).