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Table 2 Participants’ self-assessment regarding being legally permitted to drive a car

From: The hazardous (mis)perception of Self-estimated Alcohol intoxication and Fitness to drivE—an avoidable health risk: the SAFE randomised trial

  Study day 1 Study day 2
Correct/safe self-estimation Incorrect self-estimation (safety concern) Correct/safe self-estimation Incorrect self-estimation (safety concern)
“I have reached the legal driving limit” (self-estimated BrAC 0.05%) n (%) 52 (61.2%) 33 (38.8%) 44 (47.3%) 49 (52.7%)
Measured BrAC (mean ± SD) 0.035 ± 0.009 0.062 ± 0.01 0.04 ± 0.009 0.059 ± 0.007
“I am below the legal driving limit” (self-estimated BrAC < 0.05%) n (%) 3 (25.0%) 9 (75.0%) 7 (58.3%) 5 (41.6%)
Measured BrAC (mean ± SD) 0.045 ± 0.003 0.064 ± 0.018 0.041 ± 0.008 0.075 ± 0.015
  1. BrAC breath alcohol concentration, SD standard deviation