Model
Driver Screening and Evaluation Program
Volume II: Maryland Pilot Older Driver Study |
Appendix I:
Chi-Square Tables for Tests of Significance at Peak Valid Odds Ratio Values for
Violation Data
The following output from SYSTAT is all based on the calculated odds ratio values presented in
appendix I. In the tables that follow, the drivers with 1 or more violations (non-speeding and
occupant restraint) 1 year prior and up to 3 years after testing were assigned a (-1); this is done
to ensure that the group with violations appears in the left column which is important for
calculating odds ratio.
Cutoffs were obtained from the peak valid OR calculated for each measure listed below, as
reported in the analysis and results chapter of the report. Peak OR was found in analysis of
moving violations without speeding and occupant restraint for some measures; for moving
violations without speeding for other measures; and in one case, for all moving violations, as
noted in the body of the report and in the table titles that follow. The failing criteria (coded as a
0 in the first row) for each of the performance measures is as follows:
- MVPT/VC: 6 or more responses are incorrect
- Delayed Recall: 2 or more responses are incorrect
- Useful Field of View Subtest 2: Target duration is 75 msec or longer
- Trail Making Part B: Completion time is 120 seconds or more
- Dynamic Trails: Completion time is 25 seconds or more
- Rapid Pace Walk Time: Completion time is 4.5 seconds or more
- Foot Tap Time: Completion time is 12 seconds or more
Table 77.
Frequencies of Violations (Without Speeding or Occupant Restraint)
in the MVA
Renewal Sample, as a Function of Performance on the MVPT/VC
(OR=4.53, x2 =10.83, df=1,
p<.001)
| |
-1 |
0 |
Total |
|---|
| 0 |
5 |
75 |
80 |
|---|
| 1 |
26 |
1766 |
1792 |
|---|
| Total |
31 |
1841 |
1872 |
|---|
Table 78.
Frequencies of Violations (Without Speeding or Occupant Restraint)
in the MVA
Renewal Sample, as a Function of Performance on the Delayed Recall Test
(OR=1.72, x2 =1.58, df=1, p<.21)
| |
-1 |
0 |
Total |
|---|
| 0 |
7 |
264 |
271 |
|---|
| 1 |
24 |
1554 |
1578 |
|---|
| Total |
31 |
1818 |
1849 |
|---|
Table 79.
Frequencies of Violations (Without Speeding or Occupant Restraint)
in the MVA
Renewal Sample, as a Function of Performance
on the Useful Field of View Subtest 2
(OR=1.67, x2 =1.53, df=1, p<.22)
| |
-1 |
0 |
Total |
|---|
| 0 |
21 |
1046 |
1067 |
|---|
| 1 |
8 |
665 |
673 |
|---|
| Total |
29 |
1711 |
1740 |
|---|
Table 80.
Frequencies of Violations (Without Speeding) in the MVA Renewal Sample,
as a
Function of Performance on the Trail-making Part B Test
(OR=1.72, x2 =6.70, df=1, p<.01)
| |
-1 |
0 |
Total |
|---|
| 0 |
40 |
498 |
538 |
|---|
| 1 |
59 |
1263 |
1322 |
|---|
| Total |
99 |
1761 |
1860 |
|---|
Table 81.
Frequencies of Violations (Without Speeding or Occupant Restraint)
in the MVA
Renewal Sample, as a Function of Performance
on the Dynamic Trails Test
(OR=1.27, x2 =.24, df=1, p<.62)
| |
-1 |
0 |
Total |
|---|
| 0 |
10 |
377 |
387 |
|---|
| 1 |
8 |
382 |
390 |
|---|
| Total |
18 |
759 |
777 |
|---|
Table 82.
Frequencies of Violations (Without Speeding) in the MVA Renewal Sample,
as a
Function of Performance on the Rapid Pace Walk Test
(OR=1.48, x2 =.96, df=1, p<.33)
| |
-1 |
0 |
Total |
|---|
| 0 |
82 |
1433 |
1515 |
|---|
| 1 |
7 |
181 |
188 |
|---|
| Total |
89 |
1614 |
1703 |
|---|
Table 83.
Frequencies of Violations (All Moving Violations) in the MVA Renewal Sample,
as a
Function of Performance on the Foot Tap Test
(OR=2.14, x2 =2.34, df=1, p<.13)
| |
-1 |
0 |
Total |
|---|
| 0 |
5 |
19 |
24 |
|---|
| 1 |
151 |
1229 |
1380 |
|---|
| Total |
156 |
1248 |
1404 |
|---|
BACK |
CONTENTS