Table 2.
Plasma hormone concentration and ratios expressed as the median and range in healthy neonatal Standardbred (n = 10) and Thoroughbred (n = 10) foals (≤72 h).
| Variables | Standardbred (Mean Age, 30.5 h) |
Thoroughbred (Mean Age, 33 h) |
p-Value |
|---|---|---|---|
| ACTH (pg/mL) | 8.9 (6.17–12.6) | 4.75 (3.67–8) | 0.023 * |
| Cortisol (ng/mL) | 11.50 (7.8–15.68) | 21.38 (18.7–31.37) | 0.013 * |
| DHEA (ng/mL) | 38.82 (31.26–101.90) | 18.6 (12.9– 30.43) | 0.353 |
| P4 (ng/mL) | 3.07 (1.81–6.33) | 4.6 (3.1–5.82) | 0.393 |
| Aldosterone (pg/mL) | 21.4 (14.7–60) | 19.25 (8.7–47.7) | 0.684 |
| ACTH/Cortisol Ratio | 0.58 (0.22–0.94) | 0.24 (0.14–0.37) | 0.070 |
| ACTH/P4 Ratio | 4.4 (0.92–5.82) | 1.2 (0.95–2.04) | 0.063 |
| ACTH/Aldosterone Ratio | 0.44 (0.09–1) | 0.29 (0.9–2.04) | 0.623 |
| ACTH/DHEA Ratio | 0.34 (0.05–0.98) | 0.23 (0.21–0.47) | 0.705 |
| Cortisol/DHEA Ratio | 0.32 (0.14–0.62) | 1.27 (0.86–1.56) | 0.035 * |
DHEA, dehydroepiandrosterone; ACTH, adrenocorticotropin; P4, progesterone. * Significant difference in the row.