Main demographic features of the series of 290 patients with systemic sclerosis
| Number of patients | 290 |
| F/M | 5.3 |
| Age at enrolment (years) | 53 (13) (range 8–87) |
| Age at disease onset (years) | 41 (14) (range 5–80) |
| Disease duration at enrolment (years)4-150 | 11 (10) (range 0–56) |
| Disease duration at enrolment (years)4-151 | 8 (7) (range 0–51) |
| Time from disease onset to admission4-152 (years) | 8 (9) (range 0–56) |
| Time from admission to enrolment (years) | 3 (4) (range 0–23) |