Raw participant cognitive test scores and comparison with excluded sample.
| Analytic sample (n=4481), median (IQR) |
Excluded sample
(n=2959), median (IQR) | P value | |
| Processing speed | 335 (117) | 331 (119) | 0.550 |
| Processing accuracy | 3 (5) | 3 (4) | <0.001* |
| Verbal fluency | 24 (8) | 23 (8) | <0.001* |
| Recall (immediate) | 7 (2) | 7 (1) | <0.001* |
| Recall (delayed) | 6 (3) | 5 (3) | <0.001* |
*Significant differences between included and excluded sample characteristics presented at the level ɑ≤0.05 as indicated by t tests and Pearson’s χ2 test. Processing accuracy is the count of errors (missed letters) on two-letter cancellation task and is inversely scored.