What percentage did the San Diego study find for a 3 test battery at a BAC of 0.08?

The study conducted in San Diego found that a three-test battery at a blood alcohol concentration (BAC) of 0.08 had an accuracy rate of 91%. This figure reflects the effectiveness of the standardized field sobriety tests (SFSTs) in accurately identifying individuals who are impaired by alcohol at this specific BAC level. The 91% accuracy indicates that the tests were successful in differentiating between sober and intoxicated drivers, which is crucial for law enforcement in making informed decisions about arrests related to DUI offenses. This high percentage not only underscores the reliability of the SFSTs but also supports their use as a validated tool in preventing impaired driving. The precise combination of tests, which typically includes the Horizontal Gaze Nystagmus test, the Walk-and-Turn test, and the One-Leg Stand test, contributes to this elevated accuracy level at the BAC threshold of 0.08.