Skip to main content

Table 3 Modeling the psychophysical components of the TMT-B (n = 45)

From: The trail making test as a screening instrument for driving performance in older drivers; a translational research

 

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

  1. *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.