What were the conventional methods for testing alcoholic abuse? Why aren't they preferred nowadays?

Conventional methods for testing alcoholic abuse included simple urine tests and breathalyzers. They were used to detect if one has consumed alcohol in the recent past. These methods are no longer trusted as no conventional method is able to answer if one has taken alcohol say, last week! This is because, alcohol dissipates itself from the system in a matter of hours.[Source]

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Keywords: Conventional Alcohol Testing