Table 3 Subjective sleepiness, ocular indices of drowsiness, and driving performance variables in well-rested and sleep-deprived condition, for younger and older drivers.
From: On-road driving impairment following sleep deprivation differs according to age
Well rested | Sleep deprived | Significance values | |||||
|---|---|---|---|---|---|---|---|
Younger adults | Older adults | Younger adults | Older adults | Condition | Age | Condition × Age | |
KSS score | 3.43 (1.57) | 3.60 (1.72) | 7.10 (1.74)* | 6.55 (1.28)* | < 0.001 | 0.551 | 0.185 |
LFA score | 4.48 (0.68) | 4.74 (0.37) | 3.19 (0.84)* | 3.89 (0.85)* | < 0.001 | 0.001 | 0.144 |
Blink duration (ms) | 163.21 (29.27) | 195.47 (89.89) | 240.66 (99.18)* | 213.29 (119.75) | 0.003 | 0.923 | 0.038 |
Blink rate (count/min) | 15.19 (6.72) | 13.36 (10.00) | 17.04 (10.17) | 13.21 (9.87) | 0.551 | 0.268 | 0.360 |
LEC duration (ms) | 1108.44 (323.47) | 1041.26 (212.84) | 963.47 (207.30) | 1057.70 (203.00) | 0.153 | 0.800 | 0.065 |
LEC rate (count/15 min) | 4.43 (4.66) | 5.05 (9.91) | 14.63 (16.65) | 7.20 (10.52) | 0.007 | 0.096 | 0.076 |
PERCLOS (%) | 3.17 (1.72) | 3.51 (2.87) | 5.48 (3.42)* | 3.85 (2.66) | 0.003 | 0.437 | 0.033 |
LD rate (count/15 min) | 0.22 (0.38) | 0.16 (0.42) | 2.47 (2.31)* | 0.60 (0.76)* | < 0.001 | 0.113 | 0.278 |
Near-crash events | 0 (0%) | 0 (0%) | 10 (62.50%)* | 3 (17.65%)* | < 0.001 | 0.013 | n/a |
Drive terminations | 0 (0%) | 0 (0%) | 9 (56.25%)* | 3 (17.65%)* | < 0.001 | 0.071 | n/a |
