Model Driver Screening and Evaluation Program
Volume II: Maryland Pilot Older Driver Study

 

Appendix D:
Descriptive Statistics for 
Performance on Screening Measures 
as a Function of Test Sample

Key:

 

Table 14.
 Descriptive Statistics Comparing Performance on the MVPT Visual Closure 
Subtest Measure (Number Incorrect) as a Function of Test Sample
  RENMVPT RESMVPT REFMVPT
Number of cases 1872 266 313
Minimum incorrect 0.00 0.00 0.00
Maximum incorrect 11.00 8.00 10.00
Median 1.00 1.00 2.00
Mean 1.72 1.55 2.68
95% CI Upper 1.80 1.75 2.94
95% CI Lower 1.64 1.35 2.42
Standard Error 0.04 0.10 0.13
Standard Deviation 1.79 1.67 2.34

 

Table 15.
Descriptive Statistics Comparing Performance on the Delayed Recall Measure 
(Number Incorrect), as a Function of Test Sample
  RENDRINC RESDRINC REFDRINC
Number of cases 1849 264 306
Minimum 0.00 0.00 0.00
Maximum 3.00 3.00 3.00
Median 0.00 0.00 1.00
Mean 0.62 0.58 0.93
95% CI Upper 0.66 0.68 1.05
95% CI Lower 0.58 0.49 0.82
Standard Error 0.02 0.05 0.06
Standard Deviation 0.85 0.77 1.04

 

Table 16.
Descriptive Statistics Comparing Performance on the Useful Field of View 
Subtest 2 Measure (milliseconds) as a Function of Test Sample
  RENUFOV RESUFOV REFUFOV
Number of cases 1740 180 304
Minimum 0.00 0.00 0.00
Maximum 500.00 500.00 500.00
Median 130.00 193.00 344.50
Mean 173.10 219.97 321.78
95% CI Upper 180.39 243.27 342.04
95% CI Lower 165.81 196.68 301.52
Standard Error 3.72 11.81 10.30
Standard Deviation 154.99 158.39 179.51

 

Table 17.
Descriptive Statistics Comparing Performance on the Trail-Making 
Part B Measure (seconds), as a Function of Test Sample
  RENTRAILSB RESTRAILSB REFTRAILSB
Number of cases 1860 264 271
Minimum 32.72 39.90 49.97
Maximum 360.00 360.00 360.00
Median 95.09 97.67 157.44
Mean 106.62 110.23 170.38
95% CI Upper 108.78 116.31 179.07
95% CI Lower 104.45 104.15 161.68
Standard Error 1.10 3.09 4.42
Standard Deviation 47.65 50.16 72.70

 

Table 18.
Descriptive Statistics Comparing Performance on the Dynamic Trails 
Test Measure (seconds) as a Function of Test Sample
  RENDYNA RESDYNA REFDYNA
Number of cases

777

203

210

Minimum

7.23

10.45

11.71

Maximum

59.94

59.78

59.99

Median

22.39

24.63

30.55

Mean

24.44

26.06

32.63

95% CI Upper

25.15

27.48

34.24

95% CI Lower

23.74

24.64

31.01

Standard Error

0.36

0.72

0.82

Standard Deviation

9.99

10.28

11.89

 

Table 19.
Descriptive Statistics Comparing Performance on the Scan Test Measure 
(pass vs fail), as a Function of Test Sample
  RENSCAN RESSCAN REFSCAN
Number of cases 1841 264 306
Minimum 0.00 0.00 0.00
Maximum 1.00 1.00 1.00
Sum (pass) 1760.00 258.00 274.00
Median 1.00 1.00 1.00
Mean 0.96 0.98 0.90
95% CI Upper 0.97 1.00 0.93
95% CI Lower 0.95 0.96 0.86
Standard Error 0.00 0.01 0.02
Standard Deviation 0.21 0.15 0.31

 

Table 20. 
Descriptive Statistics Comparing Performance on the 
Rapid Pace Walk Measure (seconds), as a Function of Test Sample
  RENWALKTIME RESWALKTIME REFWALKTIME
Number of cases 1703 264 287
Minimum 3.14 3.15 1.49
Maximum 15.00 14.94 14.94
Median 6.06 6.46 7.31
Mean 6.47 6.77 7.79
95% CI Upper 6.56 7.00 8.08
95% CI Lower 6.38 6.54 7.51
Standard Error 0.05 0.12 0.14
Standard Deviation 1.89 1.90 2.44

 

Table 21.
Descriptive Statistics Comparing Performance on the 
Foot Tap Measure (seconds), as a Function of Test Sample
  RENTAPTIME RESTAPTIME REFTAPTIME
Number of cases 1404 258 300
Minimum 3.10 3.34 1.58
Maximum 14.58 13.10 14.07
Median 5.62 5.69 6.89
Mean 6.05 6.12 7.08
95% CI Upper 6.16 6.35 7.34
95% CI Lower 5.95 5.89 6.82
Standard Error 0.05 0.12 0.13
Standard Deviation 2.00 1.87 2.25

 

Table 22.
Descriptive Statistics Comparing Performance on the Head/Neck 
Upper Body Flexibility Measure (Pass vs Fail), as a Function of Test Sample
  RENHDNK RESHDNK REFHDNK
Number of cases 1201 265 312
Minimum 0.00 0.00 0.00
Maximum 1.00 1.00 1.00
Sum (pass) 978.00 204.00 196.00
Median 1.00 1.00 1.00
Mean 0.81 0.77 0.63
95% CI Upper 0.84 0.82 0.68
95% CI Lower 0.79 0.72 0.57
Standard Error 0.01 0.03 0.03
Standard Deviation 0.39 0.42 0.48

 

Table 23. 
Descriptive Statistics Comparing Performance on the 
Arm Reach Measure (Pass vs Fail), as a Function of Test Sample
 
RENARMRCH
RESARMRCH
REFARMRCH
Number of cases 1871 266 311
Minimum 0.00 0.00 0.00
Maximum 1.00 1.00 1.00
Sum (pass) 1857.00 261.00 294.00
Median 1.00 1.00 1.00
Mean 0.99 0.98 0.95
95% CI Upper 1.00 1.00 0.97
95% CI Lower 0.99 0.96 0.92
Standard Error 0.00 0.01 0.01
Standard Deviation 0.09 0.14 0.23

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