“…Approximately twice as many patients with PsA (21%) had nail involvement compared with patients with psoriasis alone (11%), and 44% of patients with PsA reported scalp involvement; however, overall these rates are lower than those previously reported [8,17,18,21,26]. The presence of skin disease in these areas has been found to have a disproportionate effect on QoL and is often difficult to treat, with limited effective treatment options [7,9,19,21].…”