Model
Driver Screening and Evaluation ProgramVolume II: Maryland Pilot Older Driver Study |

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

-1 | 0 | Total | |
---|---|---|---|

0 | 5 | 75 | 80 |

1 | 26 | 1766 | 1792 |

Total | 31 | 1841 | 1872 |

-1 | 0 | Total | |
---|---|---|---|

0 | 7 | 264 | 271 |

1 | 24 | 1554 | 1578 |

Total | 31 | 1818 | 1849 |

-1 | 0 | Total | |
---|---|---|---|

0 | 21 | 1046 | 1067 |

1 | 8 | 665 | 673 |

Total | 29 | 1711 | 1740 |

-1 | 0 | Total | |
---|---|---|---|

0 | 40 | 498 | 538 |

1 | 59 | 1263 | 1322 |

Total | 99 | 1761 | 1860 |

-1 | 0 | Total | |
---|---|---|---|

0 | 10 | 377 | 387 |

1 | 8 | 382 | 390 |

Total | 18 | 759 | 777 |

-1 | 0 | Total | |
---|---|---|---|

0 | 82 | 1433 | 1515 |

1 | 7 | 181 | 188 |

Total | 89 | 1614 | 1703 |

-1 | 0 | Total | |
---|---|---|---|

0 | 5 | 19 | 24 |

1 | 151 | 1229 | 1380 |

Total | 156 | 1248 | 1404 |