Table 1_Clinical, hematologic, and inflammatory factors associated with psoriatic arthritis in a Chinese hospital-based study.docx

Model performance was assessed by the Hosmer-Lemeshow test, area under the receiver operating characteristic curve (AUC), and Nagelkerke R².</p>Results<p>In clinical PsA, lower hemoglobin (adjusted OR 0.75 per 10 g/L increment), higher PLT count (adjusted OR 1.39 per 50×10⁹/L increment), and higher CRP (adjusted OR 1.78 per doubling) were independently associated with PsA (all p < 0.01; AUC 0.859). In subclinical PsA, hemoglobin and CRP showed comparable independent associations (AUC 0.878); PLT count could not be reliably assessed given the small subgroup (n = 22).

Clinical PsA showed more frequent tenosynovitis, synovitis, synovial thickening, and joint effusion on ultrasound than subclinical PsA (p < 0.05).</p>Conclusion<p>Lower hemoglobin and elevated CRP were consistently associated with PsA across both subgroups. Routine hematologic and inflammatory markers, combined with musculoskeletal ultrasound (MSUS), may help dermatologists identify psoriasis patients warranting earlier rheumatological referral; prospective studies are needed to confirm predictive value.</p>