Table 2.
Driving-related neuropsychological testing performance data in normal subjects and COPD patients.
| Parameters | Normal subjects (n = 10) | COPD patients (n = 35) | P value |
|---|---|---|---|
| SA, (% ile) | 32.5 (19–39) | 23.9 (9.3–34.8) | NS |
| RT-V, (% ile) | 89 (82–89) | 76 (53.8–88.5) | P = 0.035 |
| MR-V, (% ile) | 79.2 (12.2) | 59.8 (18.7) | P = 0.004 |
| Total RT-V, (% ile) | 82 (79–87.5) | 64.5 (59.3–76.5) | P < 0.0001 |
| RT-A, (% ile) | 84.5 (70–97) | 68 (46–83.5) | P = 0.035 |
| MR-A, (% ile) | 72.6 (22) | 49.2 (24.7) | P = 0.01 |
| Total RT-A, (% ile) | 78.3 (14.2) | 56.9 (21.6) | P = 0.0052 |
| PA, (% ile) | 26.5 (17–38) | 18 (6–34) | NS |
| TAVTMB, (% ile) | 25 (21–62) | 18 (7–24) | P = 0.003 |
| Driving ability, accepted/rejected | 8/2 | 13/22 | P = 0.029 |
Values are mean ± SD or median (range).
Abbreviations: SA: selective attention; RT-V: reaction time to visual stimuli; MR-V: motor time to visual stimuli; Total RT-V: the sum of reaction and motor time to visual stimuli; RT-A: reaction time to audio stimuli; MR-A: motor time to audio stimuli; Total RT-A: the sum of reaction and motor time to audio stimuli; PA: permanent attention; TAVTMB: tachistoscopic traffic test; P ≤ 0.05, statistically significant; NS: nonsignificant.