Table 2 Sleep parameters in the week preceding the on-road track study for younger and older drivers.

From: On-road driving impairment following sleep deprivation differs according to age

Condition

Variable

Younger adults

Older adults

p value

Well rested

Time in bed (h)

8.17 (0.25)

8.02 (0.17)

0.081

Total sleep time (h)

6.32 (1.03)

6.37 (0.90)

0.918

SOL (min)

24.55 (19.77)

10.07 (10.25)

0.022

Sleep efficiency (%)

77.61 (13.68)

79.39 (11.77)

0.715

WASO (min)

68.85 (37.21)

78.05 (53.23)

0.601

Sleep deprived

Time in bed (h)

8.30 (0.75)

8.05 (0.28)

0.229

Total sleep time (h)

7.15 (0.77)

6.42 (0.28)

0.017

SOL (min)

15.56 (16.91)

19.24 (29.62)

0.677

Sleep efficiency (%)

85.65 (5.85)

79.83 (9.42)

0.050

WASO (min)

44.95 (15.39)

65.41 (36.16)

0.052

  1. SOL sleep onset latency, WASO wake after sleep onset. Mean (SD) shown.