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Table 2 Objective and subjective measures of driving performance

From: The impact of sleep deprivation and alcohol on driving: a comparative study

Outcome measureRestedSleep deprivedIntoxicatedP value impact of coffee when sleep deprivedP value sleep deprived vs restedP value intoxicated vs rested
Before coffeeAfter coffeeBefore coffeeAfter coffeeBefore coffeeAfter coffee
Mean LCT MDLT (SD)0.33 (0.06)0.40 (0.09)0.62 (0.33)0.71 (0.47)0.54 (0.17)0.55 (0.13)0.03< 0.0001< 0.0001
Mean braking reaction time (SD)1667 (276.5)1620 (294.5)2131 (665.9)2149 (790.2)1755 (325.5)1779 (368.5)0.58< 0.00010.03
Mean lane changing reaction time (SD)2785 (457.6)2737 (495.5)3580 (1371)3636 (1386)2928 (566.3)2917 (557.2)0.35< 0.00010.0058
Mean KSS (SD)3.53 (1.55)2.7 (1.26)7.87 (0.94)6.8 (1.35)4.47 (1.61)3.9 (1.56)< 0.0001< 0.00010.02
Mean Ability (SD)4.7 (0.59)4.87 (0.35)2.53 (0.90)3.4 (0.97)2.83 (0.83)3.37 (0.76)< 0.0001< 0.0001< 0.0001