Variables | ROI | B | t0 | t5 | t10 | t15 |
---|---|---|---|---|---|---|
IRT, °C | ||||||
SSc | ||||||
1 | 29.8 (5.5)* | 21.5 (2.6)† | 23.7 (7.1)* | 25.4 (9.2)* | 27 (9.4)* | |
2 | 30.8 (7.3) | 21.4 (2.9) | 24.4 (7.9) | 25 (9.7) | 26.7 (11.1) | |
3 | 28.8 (6.4) | 20.6 (3.0)* | 22.4 (6.2)* | 24 (8.8)* | 25.9 (9.4) | |
Primary RP | 1 | 31.4 (8.0)† | 21.1 (3.2)† | 25.1 (9.5) *† | 31.4 (11) | 32.4 (10.8) |
2 | 30.8 (6.6) | 21.5 (3.5) | 25.2 (7.2) | 30.4 (10.5) | 31.7 (10.6) | |
3 | 29.5 (6.7) | 20.7 (3.1)* | 23.5 (9.6) | 30.5 (10.5) | 32 (10) | |
LSCI, fu | ||||||
SSc | 1 | 364 (299)† | 188 (177)* | 205 (282)* | 243 (257)† | 298 (288)† |
2 | 235 (306)** | 79 (84) | 100 (269) | 132 (391) | 128 (364) | |
3 | 632 (757)* | 213 (424)* | 320 (642)* | 422 (955)* | 479 (770)* | |
Primary RP | 1 | 372 (378)* | 179 (128)* | 274 (346)* | 452 (430)* | 488 (446)* |
2 | 124 (93) | 81 (61) | 81 (81) | 104 (161) | 120 (128) | |
3 | 536 (483)* | 202 (135)* | 261 (577)* | 484 (604)* | 487 (672)* |
↵* p < 0.05 vs ROI 2.
↵† p < 0.05 vs ROI 3.
↵** p = 0.007 vs primary RP. IRT: infrared thermography; LSCI: laser speckle contrast imaging; SSc: systemic sclerosis; RP: Raynaud phenomenon; IQR: interquartile range; ROI: region of interest; 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; fu: flux unit values.