Table 3.
Modeling the psychophysical components of the TMT-B (n = 45)
| TMT-B | ||
|---|---|---|
| IRR†[CI95%] | R2 | |
| Socio-demographic | ||
| Age (years) | 1.05 [0.91 to 1.20] | 0.006 |
| Gender (male) | 1.14 [0.89 to 1.45] | 0.016 |
| Education (years of schooling) | 0.91 [0.79 to 1.04] | 0.150 |
| Literacy (KHE [sec]) | 1.23 [1.09 to 1.39]* | 0.146 |
| Optical tests | ||
| Visual acuity (FrACT arc minutes) | 0.97 [0.88 to 1.06] | 0.004 |
| Contrast sensitivity (75% threshold Gabor patch) | 1.12 [1.02 to 1.22]* | 0.075 |
| Neuropsychological tasks | ||
| Visio-spatial search (TMT-A [sec]) | 1.25 [1.10 to 1.41]* | 0.157 |
| Mental flexibility (Perseverative errors WCST [%]) | 1.11 [0.96 to 1.29] | 0.035 |
| Working memory (Digit backwards [n°]) | 0.75 [0.62 to 0.91]* | 0.109 |
| Verbal fluency ([animals + fruit–veg.] /2 [n°/min]) | 0.85 [0.73 to 0.98]* | 0.074 |
| Functional mobility (timed up-and-go test - TUG [sec]) | 1.11 [0.99 to 1.11] | 0.047 |
| Computed tasks | ||
| Visual processing (Vernier’s Task) | ||
| Vernier offset (ms) | 1.12 [0.93 to 1.34] | 0.023 |
| Vernier duration (ms) | 1.12 [0.90 to 1.40] | 0.015 |
| Masking effect without shine through SOA 5 (ms) | 1.11 [0.97 to 1.27] | 0.035 |
| Simple response time (ms) | 1.11 [0.93 to 1.32] | 0.029 |
| Visual search (RT [ms]) | 1.12 [0.96 to 1.32] | 0.040 |
| Motion direction sensitivity (% dots) | 1.17 [1.06 to 1.29]* | 0.125 |
| Orientation discrimination sensitivity | 1.17 [1.09 to 1.25]* | 0.091 |
| Biological motion | 0.95 [0.80 to 1.13] | 0.005 |
| Simon’s effect (Δt [ms]) | 1.03 [0.86 to 1.25] | 0.002 |
*Significant at p < 0.05. † Incidence risk ratio was measured using Poisson regression. Continuous values were transformed to be normally distributed and have a range of 0 to 1 from the twenty-fifth to the seventy-fifth percentile of the population. FrACT = Freiburg Visual Acuity and Contrast Test, IRR = Incidence-rate ratio, R2 = Coefficient of determination, SOA = Stimulus-onset-asynchrony.