A recent study conducted by researchers at the University of Illinois has examined data from over 32,000 mobile breathalyzer users from 2016 to 2022. These breathalyzers, which connect to smartphones, prompt users to estimate their blood alcohol concentration (BAC) prior to each test before revealing the actual reading. After evaluating hundreds of thousands of tests, the researchers discovered that approximately 70% of participants misjudged their level of intoxication. However, as time passed, users became more adept at assessing their own sobriety. Notably, this enhanced self-awareness appeared to aid heavier drinkers, whose average BAC decreased from 0.106% to 0.096%, indicating they were more likely to cease drinking earlier. Conversely, the study found that moderate drinkers exhibited an increase in their BAC levels. Researchers speculate that this group tends to use the legal driving limit of 0.08% as a benchmark, leading them to feel secure in continuing to drink as long as they remain "under the limit."
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