Table 1.

Patient characteristics of healthy controls, patients with primary Raynaud's phenomenon and systemic sclerosis

	Healthy controls N = 10	Primary Raynaud phenomenon N = 10	Systemic sclerosis N = 10
Age (years), mean ± SD	29.9 ± 2.7	47.8 ± 16.2	56.2 ± 11.5
Female gender, n	7	8	5
Weight (kg), mean ± SD	71.3 ± 11.7	64.4 ± 11.9	73.3 ± 11.3
Height (cm), mean ± SD	177 ± 8.7	170 ± 10.0	176 ± 5.9
Smoking, n
Current	0	1	2
Past smoker	0	3	7
Comorbidities, n
Hypertension	0	1	2
Hypercholesterolemia	0	0	1
Diabetes	0	1	0
ACR/EULAR score ≥9, n	0	0	10
Disease duration (years), median (IQR)	N/A	8.0 (4.0‐17.0)	4.5 (3.0‐6.3)
Abnormal NCM pattern, n	0	0	10
Positive autoantibodies, n	0	0	8
Organ involvement, n
Pulmonal	0	0	0
Esophageal	0	0	3
Creatinine, median (IQR)	72.1 [66.5‐77.6]	72.0 [63.5‐72.0]	76.2 [63.5‐88.6]
eGFR, median (IQR)	94.5 [90.6‐114.8]	79.3 [68.3‐97.4]	86.6 [74.1‐98.5]
Digital ulcers, n	0	0	6
Medication, n
Nifedipine	0	1	2
Iloprost	0	0	2
Bosentan	0	0	3

ACR/EULAR, The American College of Rheumatology/European League Against Rheumatism (EULAR); NCM, Nailfold Capillary Microscopy.