Table 1.

Sociodemographic and clinical characteristics of scleroderma patients

Characteristic	Value (n=17)
Women, n (%)	15 (88)
Ethnicity
Caucasian, n (%)	10 (59)
African American, n (%)	6 (35)
Asian, n (%)	1 (6)
Age, median (years) [range]	51 [30–70]
Skin Subtype
Limited, n (%)	10 (59)
Diffuse, n (%)	7 (41)
Smoking status
Former, n (%)	3 (18)
Current, n (%)	1 (6)
Never, n (%)	13 (76)
Current use of vasodilator therapy *, n (%)	7 (41)
RP duration, mean±SD (years)	11.9 ± 7.9
Pulmonary arterial hypertension †, n (%)	4 (33)
RP Severity Score, mean ‡	1.38

^*Therapy was suspended on the day of the study. All 17 patients were taking calcium channel blockers, with one subject being concurrently on oral sildenafil.

^†Pulmonary Arterial Hypertension defined as estimated Right Systolic Ventricular Pressure (RVSP) >40 mmHg (echocardiogram performed within 6 months). ECHO data was available for 12 of 17 patients.

^‡Defined as 0 = no RP, 1 = RP alone, 2 = presence of digital pitting scars, 3 = active digital tip ulceration, 4 = active digital gangrene.