Table 2:

Vascular Reactivity Index With Clinical and Demographic Characteristics

Variable	Correlation Coefficient or Mean ± SD	P-value
Age*	Spearman’s rho = −.32	p=0.08
Modified Rodnan Skin Score *	Spearman’s rho =−0.06	p=0.7
Duration of SSc (first non-Raynaud symptom)*	Spearman’s rho =−0.25	p= 0.15
History of Scleroderma Renal Crisis**
Yes	0.58 ± 0.46
No	0.88 ± 0.54	p=0.31
Current Scleroderma Renal Crisis**
Yes	0.59 ± 0.46
No	0.90 ± 0.56	p =0.31
History of Pulmonary Artery Hypertension**
Yes	0.75 ± 0.48
No	0.85 ± 0.54	p=0.80
Current Pulmonary Artery Hypertension**
Yes	0.70 ± 0.46
No	0.95 ± 0.56	p = 0.34
History of Digital Tip Ulcer**		p =0.41
Yes	0.74 ± 0.58
No	0.91 ± 0.50,
Current ILD**		p=0.96
Yes	0.86 ± 0.62
No	0.85 ± 0.43,
Smoking**		p= 0.59
Never	0.78 ± 0.56
In the past or current	0.88 ± 0.52
Vasodilator therapy **		p = 0.52
Calcium Channel Blockers	0.73 ± 0.48
Other	0.86 ± 0.56
Gastrointestinal medications**	0.74 ± 0.44	P=0.42
	0.89 ± 0.61

^*Spearman’s Rho,

^**Mean ± standard deviation;