The risk of psoriatic arthritis remains constant following initial diagnosis of psoriasis among patients seen in European dermatology clinics,10.1111/

• ... Furthermore, the likelihood of developing PsA correlates with duration of clinical psoriasis...

Caroline A. Chang, et al. Management of psoriatic arthritis from the view of the dermatologist

• ...Psoriatic arthritis may cause joint destruction, disability, and reduced quality of life. Patients with the disease have more disability and a worse quality of life than those with psoriasis alone....

Dafna D Gladman. Etanercept for psoriatic arthritis

• ... frequent in PASI 100 and PASI 75 groups with the highest number of patients and more severe diseases, as compared to PASI 50 and PASI 10. Half the total PsA study group (55.5%) independent of PASI had DIP joint involvement in hands and 16.1% in toes (Table 3). These facts were in agreement with other report describing that patients with high body surface area (BSA) currently affected by psoriasis were more likely to have developed PsA [ ...