Clinical and serological features of systemic sclerosis patients, according to different geographic areas: insights from an observational, cross-sectional study of two independent cohorts.

Objectives: To evaluate the clinical, and serological features and treatments in two independent cohorts of Italian and Egyptian systemic sclerosis (SSc) patients, according to geographic areas.

Methods: 3 Italian and 5 Egyptian centres participated in patient recruitment in 2017. The demographic, clinical, and serological data were collected and defined according to the previously developed severity score and activity index.