THU0428 Psoriasis Arthritis Is Associated with Periarticular Bone Loss of The Metacarpals

BackgroundThe BoneXpert is a new Digital X-ray Radiogrammetry method measures the cortical bone thickness of the metacarpals.ObjectivesThe aim of this study was to quantify cortical bone loss in patients with Psoriasis Arthritis (PsA) and to compare these findings with the PsA modified van der Heijde Sharp Score.MethodsThe study includes 104 PsA patients. The BoneXpert method was used to measure the Metacarpal Index (MCIBX) at the metacarpal bones (II to IV). Additionally, the T-Score of the MCI (T-ScoreMCI) was calculated. Radiographic severity was evaluated by the PsA modified van der Heijde Sharp Score (Joint Space Narrowing Score and Erosion Score).ResultsFor the total PsA study cohort the T-ScoreMCI was significantly reduced with -1.289 ± 1.313 SD. The MCI presented a negative correlation to the Joint Space Narrowing Score (r = -0.558; p