This study aims to identify the nail ultrasonography (NUSG) properties in patients with psoriatic arthritis (PsA) and healthy controls by a participant-based evaluation; to assess feasibility, reliability, and discriminative performances; to explore final scorings; and to determine associations between the NUSG scores and participant characteristics, including demographics and disease-related factors.
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The nail plate impairment score
Timeframe: Baseline (T0)
The nail plate thickness score
Timeframe: Baseline (T0)
The nail bed thickness score
Timeframe: Baseline (T0)
The nail thickness score
Timeframe: Baseline (T0)
The Doppler activity score
Timeframe: Baseline (T0)