Table 3.
SV characteristics of the physical examinees consisting of 627 subhealthy and 70 healthy individuals; Shanghai, China, 2020–2021.
| Characteristics of SV | Subhealthy (n = 627) | Healthy (n = 70) | K/F | P value |
|---|---|---|---|---|
| N/Mean | N/Mean | |||
| SV-L, mean (SD) | 22.20 (4.30) | 23.21 (4.15) | 1.535 | 0.061a |
| SV-a, mean (SD) | 14.01 (3.11) | 17.75 (3.39) | 0.279 | < 0.001a |
| SV-b, mean (SD) | 4.07 (2.13) | 6.88 (1.65) | 5.716 | < 0.001a |
| Tortuosity of SV, N (%) | 25.114 | < 0.001b | ||
| T1 | 196 (31.3) | 9 (12.9) | ||
| T2 | 269 (42.9) | 22 (31.4) | ||
| T3 | 162 (25.8) | 39 (55.7) | ||
| Trunk-length of SV, N (%) | 37.304 | < 0.001b | ||
| L1 | 427 (68.1) | 25 (35.7) | ||
| L2 | 109 (17.4) | 13 (18.6) | ||
| L3 | 91 (14.5) | 32 (45.7) | ||
| Width of SV, N (%) | 25 (35.7) | 0.611 | 0.685b | |
| W1 | 80 (12.8) | 10 (14.3) | ||
| W2 | 71 (11.3) | 10 (14.3) | ||
| W3 | 476 (75.9) | 50 (71.4) |
aUsed two independent-sample t tests, and bUsed the Mann‒Whitney U test. SV sublingual veins, SV-L the value of the sublingual veins on the L-axis in Lab colour space, SV-a the value of the sublingual veins on the a-axis in Lab colour space, SV-b the value of the sublingual veins on the b-axis in Lab colour space, T1 grade 1 of sublingual veins tortuosity, T2 grade 2 of sublingual veins tortuosity, T3 grade 3 of sublingual veins tortuosity, L1 grade 1 of sublingual veins trunk-length, L2 grade 2 of sublingual veins trunk-length, L3 grade 3 of sublingual veins trunk-length, W1 grade 1 of sublingual veins width, W2 grade 2 of sublingual veins width, W3 grade 3 of sublingual veins width.