Table 1.
Skin surface temperature, vein diameter and differences in values of skin surface temperature and vein diameter (median and IQR) before and after HILT application for horses from pigmented skin group (A) and non-pigmented skin group (B).
| Parameters | Group A Pigmented Skin |
Group B Non-Pigmented Skin |
p-Value |
|---|---|---|---|
| Tavg before HILT (°C) | 25.8 (23.0–29.5) | 30.1 (22.1–31.8) | 0.257 |
| Min–Max | 21.3–30.8 | 17.8–32.2 | |
| Davg before HILT (mm) | 3.1 (2.8–3.7) | 3.8 (2.9–4.3) | 0.226 |
| Min–Max | 2.4–4.1 | 2.6–5.7 | |
| Tavg after HILT (°C) | 28.2 (26.1–31.6) | 27.8 (22.9–30.7) | 0.496 |
| Min–Max | 24.3–33.9 | 20.9–31.9 | |
| Davg after HILT (mm) | 4.0 (3.5–4.9) | 4.3 (3.2–5.5) | 0.596 |
| Min–Max | 2.7–5.0 | 2.5–5.8 | |
| ΔTavg (°C) | 3.0 (2.1–3.6) | −0.2 (–2.5–0.7) | 0.001 * |
| Min–Max | 0.5–5.5 | –3.5–3.1 | |
| ΔDavg (mm) | 0.9 (0.4–1.1) | 0.4 (0.1–0.9) | 0.140 |
| Min–Max | 0.2–1.8 | −0.1–1.5 |
* Statistically significant results of the independent non-parametric Mann–Whitney U test. Abbreviations: HILT, high-intensity laser therapy; Tavg, skin surface temperature; Davg, vein diameter; ΔTavg, differences in values of skin surface temperature after HILT; ΔDavg, differences in values of vein diameter after HILT.