The term “non-negative” on a drug test is often a source of confusion for individuals undergoing screening….
confirmatory test
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A **confirmatory test** is a specialized procedure used to verify initial test results, ensuring accuracy and reliability in diagnosis or analysis. Often employed in medical, scientific, and forensic settings, confirmatory tests provide definitive evidence by ruling out false positives or negatives from preliminary screenings. These tests are critical for making informed decisions, validating findings, and supporting further action or treatment plans.