Table 3.
Mean total serum cortisol concentration, serum free cortisol fraction, serum free cortisol concentration, and basal serum insulin concentration in horses and ponies with PPID or EMS. Data shown are mean ± standard deviation (range)
| Total Cortisol Concentration (μg/dL) | Free Cortisol Fraction (%) | Free Cortisol Concentration (μg/dL) | Insulin Concentration (μIU/mL) | |
|---|---|---|---|---|
| PPID | ||||
| Horses (n = 16) | 3.1 ± 0.9 (2.0–5.9) | 8.1 ± 4.8 (4.9–24.9) | 0.3 ± 0.2 (0.1–0.9) | 34.5 ± 27.7 (3.5–87.1) |
| Ponies (n = 4) | 8.6 ± 9.2 (1.1–21.9) | 11.6 ± 9.1 (6.0–25.3) | 1.6 ± 2.6 (0.1–5.5) | 93.1 ± 65.6 (17.3–174.5) |
| EMS | ||||
| Horses (n = 12) | 4.1 ± 1.6 (1.6–7.5) | 4.5 ± 2.7 (2.4–11.3) | 0.2 ± 0.2 (0.1–0.9) | 52.7 ± 57.5 (12.0–225.1) |
| Ponies (n = 8) | 7.7 ± 7.3 (3.8–25.4) | 16.2 ± 17.4a (3.4–52.3) | 1.4 ± 2.1a (0.2–5.9) | 138.9 ± 143.2 (17.9–392.5) |
a
Denotes significant (P < .05) differences between horses and ponies within each disease group.