Association of Obesity and Vitamin D Deficiency with Disease Activity in Patients with Psoriatic Arthritis

Purpose:Obesity and vitamin D deficiency are common comorbidities in psoriatic arthritis (PsA) and have been associated with increased disease activity. However, the independent contribution of vitamin D deficiency beyond obesity remains unclear. We evaluated the associations of obesity and vitamin D deficiency status with disease activity in PsA.Methods: This retrospective study included adults fulfilling the Classification Criteria for Psoriatic Arthritis (CASPAR). Patients were categorized by obesity (body mass index ≥30 vs.