Table 3.

Laser Doppler perfusion imaging findings in 3 groups of the study population. Mean (± SD) values of minimum, mean, and maximum perfusion are expressed as perfusion units.

Timepoint	Group	Minimum Perfusion	Mean Perfusion	Maximum Perfusion	SD Mean Value
Baseline	SSc patients with PAH	0.164 ± 0.070	0.795 ± 0.119	2.363 ± 0.429	0.292 ± 0.050
	SSc patients without PAH	0.169 ± 0.076	0.784 ± 0.144	2.296 ± 0.523	0.282 ± 0.048
	Healthy controls	0.198 ± 0.067	0.852 ± 0.187	2.786 ± 0.773	0.305 ± 0.047
4 weeks	SSc patients with PAH	0.170 ± 0.066	0.800 ± 0.122	2.302 ± 0.434	0.291 ± 0.047
	SSc patients without PAH	0.166 ± 0.072	0.781 ± 0.148	2.289 ± 0.518	0.278 ± 0.043
	Healthy controls	0.190 ± 0.064	0.848 ± 0.192	2.744 ± 0.7623	0.311 ± 0.044
8 weeks	SSc patients with PAH	0.207 ± 0.084^*	0.911 ± 0.166^**	2.912 ± 0.0512^*	0.313 ± 0.051^*^
	SSc patients without PAH	0.166 ± 0.070	0.774 ± 0.184	2.294 ± 0.533	0.284 ± 0.046
	Healthy controls	0.194 ± 0.063	0.858 ± 0.177	2.812 ± 0.786	0.307 ± 0.048
16 weeks	SSc patients with PAH	0.210 ± 0.078^*	0.915 ± 0.178^**	2.911 ± 0.522^*	0.333 ± 0.049^*^
	SSc patients without PAH	0.170 ± 0.076	0.790 ± 0.144	2.290 ± 0.493	0.284 ± 0.052
	Healthy controls	0.196 ± 0.059	0.860 ± 0.167	2.810 ± 0.746	0.310 ± 0.050

PAH: pulmonary arterial hypertension.
↵* p < 0.05,
↵** p < 0.001,
*** p < 0.01 compared with baseline.