Psychometric Evaluation of the Scleroderma Skin Questionnaire: A Novel Patient Reported Outcome for Skin Disease in Patients with Systemic Sclerosis.

Objective: To evaluate the psychometric properties of the Scleroderma Skin Questionnaire (SSQ), a novel patient-reported outcome (PRO) to assess systemic sclerosis (SSc) related skin symptoms.

Methods: The SSQ was administered to 799 adults (mean age 52.7; 82% female) enrolled in the SSc Collaborative National Quality and Efficacy Registry (CONQUER).