Gender differences in organ involvement and survival in systemic sclerosis – experience of a EUSTAR center

Introduction. The low overall prevalence of systemic sclerosis (SSc) and the low proportion of male patients have resulted in a scarcity of studies assessing sex differences in SSc patients, and contradictory results have often been observed. Material and method. We performed a retrospective observational study using data extract from the EULAR scleroderma trials and research (EUSTAR) cohort 096 . We looked at sex influence on disease characteristics at baseline and then focused on patients with at least 2 years of follow-up to estimate the effects of sex on disease progression and survival. Results. 173 patients with SSc were available for the baseline analyses. In the longitudinal analysis after a mean follow-up of 3.5(±0.65) years, male sex was associated with a higher risk of scleroderma renal crisis (OR:9.45 (1.49 to 59.69); p = 0.004), digital contractures (OR:8.2 (3.1 to 21.9); p < 0.001), arrhythmias (OR: 3.37 (1.36 to 8.34); p = 0.006), pulmonary fibrosis (OR: 3.56, (1.51 to 8.41); p = 0.003), pulmonary hypertension (OR: 3.01 (1.19 to 7.59); p = 0.016), severe vascular involvement (OR:2.86, (1.22 to 6.73); p = 0.013) and low ventricular ejection fraction (OR: 2.84, (1.2