Table 1.
Mean mood and memory performance scores (±SD) for the low (n = 15; mean IGF-I = 13.8 nmol/L) and high (n = 15; mean IGF-I = 22.5 nmol/L) IGF-I groups. Higher scores for fatigue, mood total, and symbol-digit correspond to worse performance. Higher scores for the other tests correspond to better performance.
| Low IGF-I | High IGF-I | |||
|---|---|---|---|---|
| Baseline | Session 2 | Baseline | Session 2 | |
| Vigor | 3.25 ± 0.8 | 3.48 ± 0.7 | 3.39 ± 0.91 | 3.23 ± 1.21 |
| Fatigue | 2.73 ± 0.65 | 2.52 ± 0.7 | 2.84 ± 0.95 | 2.77 ± 1.21 |
| Mood total | 1.51 ± 0.31 | 1.55 ± 0.3 | 1.64 ± 0.41 | 1.64 ± 0.62 |
| Associate learning trial 1 | 4.33 ± 2.09 | 3.6 ± 1.96 | 3.37 ± 1.7 | 3.80 ± 2.21 |
| Associate learning trial 2 | 5.0 ± 1.81 | 4.67 ± 2.44 | 4.8 ± 1.97 | 4.53 ± 2.1 |
| Associate learning trial 3 | 6.2 ± 2.18 | 6.13 ± 1.64 | 5.2 ± 2.30 | 5.4 ± 1.80 |
| Associate recall | 6.4 ± 2.2 | 5.6 ± 2.77 | 5.13 ± 2.10 | 5.47 ± 2.39 |
| Digit span forward | 6.13 ± 1.64 | 6.0 ± 1.0 | 6.0 ± 1.56 | 5.53 ± 1.64 |
| Digit span backward | 5.47 ± 1.55 | 4.27 ± 1.22 | 4.93 ± 1.83 | 4.67 ± 1.44 |
| Symbol-digit (error) | 2.47 ± 5.54 | 1.6 ± 2.67 | 3.36 ± 4.74 | 1.45 ± 1.69 |
| WM composite | 9.8 ± 2.48 | 7.87 ± 2.10 | 8.67 ± 3.13 | 8.47 ± 2.47 |