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 Crash Data

The following output from SYSTAT is all based on the calculated odds ratio values presented in appendix G. In the tables that follow, drivers with 1 or more (at-fault) crashes 1 year prior and up to 3 years after testing were assigned a (-1); this is done to ensure that the crashing group appears in the left column, which is important for calculating odds ratios.

Cutoffs were obtained from the peak valid OR calculated for each measure listed below,
as reported in the analysis and results chapter. The __failing__ criteria (coded as a 0 in the first row)
for each of the performance measures is as follows:

- MVPT/VC: 5 or more responses are incorrect
- Delayed Recall: 2 or more responses are incorrect
- Useful Field of View Subtest 2: Target duration is 275 msec or longer
- Trail Making Part B: Completion time is 80 seconds or more
- Dynamic Trails: Completion time is 22.5 seconds or more
- Rapid Pace Walk Time: Completion time is 9 seconds or more
- Foot Tap Time: Completion time is 6 seconds or more
- Head/Neck Rotation: N/A (binary measure)

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

0 | 13 | 147 | 160 |

1 | 30 | 1682 | 1712 |

Total | 43 | 1829 | 1872 |

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

0 | 5 | 82 | 87 |

1 | 36 | 1726 | 1762 |

Total | 41 | 1808 | 1849 |

-1 |
0 |
Total | |

0 |
17 | 438 | 455 |

1 |
21 | 1264 | 1285 |

Total |
38 | 1702 | 1740 |

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

0 | 36 | 1224 | 1260 |

1 | 5 | 595 | 600 |

Total | 41 | 1819 | 1860 |

-1 |
0 |
Total | |

0 |
10 | 377 | 387 |

1 |
7 | 383 | 390 |

Total |
17 | 760 | 777 |

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

0 | 8 | 153 | 161 |

1 | 30 | 1512 | 1542 |

Total | 38 | 1665 | 1703 |

-1 |
0 |
Total | |

0 |
12 | 552 | 564 |

1 |
12 | 828 | 840 |

Total |
24 | 1380 | 1404 |

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

0 | 8 | 215 | 223 |

1 | 14 | 964 | 978 |

Total | 22 | 1179 | 1201 |