Abstract
Nail psoriasis affects 20 to 30% of psoriasis patients and is an early predictor of psoriatic arthropathy (PsA). We have evaluated the prevalence, clinical characteristics, and impact on quality of life of patients with nail psoriasis.We conducted a multicenter retrospective cohort study was of patients registered with The Malaysian Psoriasis Registry (MPR) from 1 January 1, 2007 through 31 December 31, 2020.Of the 24147 patients, 13081 (54.2%) had nail psoriasis. Patients with nail psoriasis had la ater onset of psoriasis (34.0±16.6 vs 32.9±17.6 years, p<0.001) and longer disease duration (11.4±10.5 vs 8.5±9.4 years, p<0.01), with a male to female ratio of 1.2:1. They were more likely to have a family history of psoriasis, cardiometabolic diseases, smoking history, higher body mass index, severe disease, PsA, face and scalp involvement and higher mean Dermatology Life Quality Index scores (9.36±6.84 vs 8.87±6.60). Systemic treatment and biologics were more commonly prescribed in this cohort (25.0% vs 13.2%, p<0.001).Overall, 54.2% of the MPR patients had nail involvement. Nail psoriasis was associated with longer duration of psoriasis, older age of onset, male gender, and a family history of psoriasis. It proved to be an important predictor for PsA, severe psoriasis, face and scalp involvement, increased cardiometabolic risk, and a greater impairment of quality of life.
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