| Biomarker ROCs | Poor impulse control rho for alpha 0.05 |
| High noradrenaline (n 133) | 0.575 |
| Low visual span (n 126) | 0.515 |
| High adrenaline (n 133) | 0.485 |
| Low competing words score (% of pass score) (n 124) | 0.467 |
| Low auditory speed of processing (% of age) (n 121) | 0.451 |
| High dopamine (n 133) | 0.432 |
| Low visual speed of processing (% of age) (n 121) | 0.402 |
| Low reverse digit span (n 128) | 0.362 |
| Low vitamin D (n 132) | 0.305 |
| High distance vision score on right (n 128) | 0.304 |
| Long threshold per cent base length/duration (n 122) | 0.300 |
| Low activated vitamin B6 (n 126) | 0.278 |
| Low red cell folate (n 133) | 0.273 |
| Low threshold time to offset/base length (n 122) | 0.264 |
| High HPL/creatinine (n 133) | 0.242 |
| High threshold stapes amplitude projected (n 123) | 0.232 |