Research Article

Driving-Related Neuropsychological Performance in Stable COPD Patients

Table 3

Characteristics and attention/alertness performance data for COPD patients who have been accepted and those who have been rejected as safe drivers.

Rejected ( )Accepted ( )

AGE, (yrs)61.5 (6.6)55.7 (6.6)0.017
Ht, (m)1.68 (0.1)1.73 (0.1)0.042
Wt, (% pred)104.8 (92–117)111 (96–122)NS
BMI26.1 (3.5)27.1 (4)NS
FVC, (% pred)79.7 (18.7)96.8 (18.2)0.013
FEV1, (% pred)35.4 (14.9)59.8 (24.5)<0.001
FEV1/FVC, %45.6 (13)63.2 (20.5)0.004
IC, (% pred)75.6 (13.4)90.2 (20)0.015
TLC, (% pred)101 (16.6)98.4 (10.4)NS
RV, (% pred)133.4 (47.6)104.1 (20.3)0.044
RV/TLC (%)47.9 (10.6)36.5 (8.9)0.003
DLCO, (% pred)50.6 (15.3)74.8 (24)<0.001
PaO2 (mm Hg)72.2 (68.7–79.3)86 (74.9–99.3)0.005
PaCO2 (mm Hg)41.6 (6)38.7 (4.13)NS
SaO2, (%)94.2 (2.3)96.4 (1.9)0.006
SpO2, (%)93.5 (2.4)96.5 (2.0)<0.001
mMRC, grade3 (2–4)1 (1–2.5)0.002
IQ (% ile)75 (50–85)90 (80–95)0.009
SA, (% ile)19.5 (17.1)36 (23.5)0.021
RT-V, (% ile)63.3 (27.9)78.3 (14.1)NS
MR-V, (% ile)57.5 (20.8)63.7 (14.5)NS
Total RT-V, (% ile)61.3 (47–75)71.5 (65–80.5)0.047
RT-A, (% ile)59.5 (27.4)73.2 (18.2)NS
MR-A, (% ile)47.2 (28.9)52.6 (15.8)NS
Total RT-A, (% ile)53.4 (24.3)62.9 (15)NS
PA, (% ile)8.5 (5–16)43 (33.8–51.8)<0.001
TAVTMB, (% ile)9 (5–14)25 (21–30)<0.001

Values are mean (SD) or median (range).
Abbreviations as in Table 3.