Table 4.
Relationship between brain metabolites and memory performance.
| Within normal limits (>16th %ile) | Mildly impaired (16th–2nd %ile) | Severely impaired (<2nd %ile) | Total (%) | |
|---|---|---|---|---|
| Ventricular lactate and verbal memory performance: p = 0.40 | ||||
| Within normal limits (≤ 4.8 i.u.) | 34 | 11 | 2 | 47 (49.0) |
| High (4.8–5.7 i.u.) | 14 | 5 | 1 | 20 (20.8) |
| Very high (≥ 5.7 i.u.) | 17 | 7 | 5 | 29 (30.2) |
| Total (%) | 65 (67.7) | 23 (24.0) | 8 (8.3) | n = 96 |
| Ventricular Lactate and Visual Memory Performance: p < 0.0001 | ||||
| Within normal limits (≤ 4.8 i.u.) | 29 | 10 | 8 | 47 (49.0) |
| High (4.8–5.7 i.u.) | 16 | 2 | 2 | 20 (20.8) |
| Very high (≥ 5.7 i.u.) | 5 | 7 | 17 | 29 (30.2) |
| Total (%) | 50 (52.1) | 19 (19.8) | 27 (28.1) | n = 96 |
| Occipital lactate and verbal memory performance: p = 0.45 | ||||
| Within normal limits (≤ 4.5 i.u.) | 45 | 17 | 4 | 66 (68.7) |
| High (4.5–5.4 i.u.) | 11 | 4 | 1 | 16 (16.7) |
| Very high (≥ 5.4 i.u.) | 9 | 2 | 3 | 14 (14.6) |
| Total (%) | 65 (67.7) | 23 (24.0) | 8 (8.3) | n = 96 |
| Occipital lactate and visual memory performance: p = 0.01 | ||||
| within normal limits (≤ 4.5 i.u.) | 40 | 14 | 12 | 66 (68.7) |
| High (4.5–5.4 i.u.) | 7 | 3 | 6 | 16 (16.7) |
| Very high (≥ 5.4 i.u.) | 3 | 2 | 9 | 14 (14.6) |
| Total (%) | 50 (52.1) | 19 (19.8) | 27 (28.1) | n = 96 |
| Occipital NAA and verbal memory performance: p = 0.44 | ||||
| Low (≤14.0 i.u.) | 15 | 6 | 4 | 25 (26.0) |
| Within normal limits (14.0–17.6 i.u.) | 27 | 10 | 1 | 38 (39.6) |
| High (≥ 17.6 i.u.) | 23 | 7 | 3 | 33 (34.4) |
| Total (%) | 65 (67.7) | 23 (24.0) | 8 (8.3) | n = 96 |
| Occipital NAA and visual memory performance: p = 0.002 | ||||
| Low (≤14.0 i.u.) | 10 | 1 | 14 | 25 (26.0) |
| Within normal limits (14.0–17.6 i.u.) | 19 | 13 | 6 | 38 (39.6) |
| High (≥ 17.6 i.u.) | 21 | 5 | 7 | 33 (34.4) |
| Total (%) | 50 (52.1) | 19 (19.8) | 27 (28.1) | n = 96 |