Table 4.

Reproducibility of IRT and LSCI for each ROI at baseline and following cold challenge for both primary RP and SSc. Values are ICC (95% CI). N = 41, unless stated otherwise.

ROI	Camera	B	t0	t5	t10	t15
1	IRT^*	0.51 (0.24–0.71)	0.61 (0.36–0.78)	0.52 (0.25–0.72)	0.5 (0.23–0.7)	0.54 (0.28–0.73)
1	LSCI	0.62 (0.39–0.78)	0.86 (0.75–0.92)	0.52 (0.25–0.71)	0.34 (0.04–0.58)	0.47 (0.19–0.68)
2	IRT^*	0.51 (0.24–0.71)	0.56 (0.3–0.75)	0.54 (0.28–0.73)	0.54 (0.28–0.73)	0.55 (0.28–0.73)
2	LSCI	0.63 (0.4–0.78)	0.59 (0.33–0.76)	0.65 (0.43–0.79)	0.54 (0.28–0.73)	0.30 (0–0.55)
3	IRT^**	0.59 (0.33–0.76)	0.6 (0.35–0.77)	0.55 (0.28–0.73)	0.63 (0.4–0.79)	0.70 (0.5–0.83)
3	LSCI^*	0.55 (0.29–0.73)	0.79 (0.63–0.89)	0.5 (0.22–0.7)	0.42 (0.13–0.65)	0.55 (0.29–0.73)

↵* n = 40.
↵** n = 39. IRT: infrared thermography; LSCI: laser speckle contrast imaging; ROI: region of interest; RP: Raynaud phenomenon; SSc: systemic sclerosis; B: baseline assessment at 23°C; t0: assessments immediately following cold challenge; t5: perfusion 5 min post cold challenge; t10: perfusion 10 min post cold challenge; t15: perfusion 15 min post cold challenge.