| Biomarker ROCs | Abstract thinking impairment rho for alpha 0.05 |
| Low auditory speed of processing (% of age) (n 121) | 0.546 |
| Low visual speed of processing (% of age) (n 121) | 0.545 |
| Low visual span (n 126) | 0.536 |
| Low competing words score (% of pass score) (n 124) | 0.505 |
| High noradrenaline (n 133) | 0.460 |
| High adrenaline (n 133) | 0.405 |
| High HPL/creatinine (n 133) | 0.395 |
| Long threshold per cent base length/duration (n 122) | 0.367 |
| Low reverse digit span (n 128) | 0.319 |
| High dopamine (n 133) | 0.272 |
| High threshold gradient middle ear pressure (n 124) | 0.267 |
| High threshold stapes amplitude projected (n 123) | 0.261 |
| High distance vision score on right (n 128) | 0.240 |
| Low threshold time to offset/base length (n 122) | 0.236 |
| Low red cell folate (n 133) | 0.230 |
| High serum B12 (n 134) | 0.219 |
| High percent free copper to zinc ratio (n 133) | 0.191 |
| Low vitamin D (n 132) | 0.186 |