False Negative

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Definition - What does False Negative mean?

A false negative refers to an erroneous test finding stemming from failure to detect residual drug metabolites in the system, often based on deliberate adulteration/tampering by the donor in question. The collection of a urine specimen serves as a primary method in drug testing procedures; however, employers contend with applicants and current employees manipulating test results with counterfeit samples, potentially leading to false negatives.

SureHire explains False Negative

For many companies, a drug and alcohol-free policy hinges on the cooperative interplay between employers and employees, upholding corporate values that promote and sustain a safe workplace environment. However, objective rules can often provoke resistance to prevailing norms. Consequently, individuals struggling with addictions are often reluctant to project transparency over substance abuse issues, forfeiting the integrity of standard drug-testing protocol by engaging in deceptive behaviour that can result in false-negative scenarios. Collection sites generally assume preemptive measures against individuals who resort to diluting a urine specimen, for example, by using chemical base solutions (i.e. blue toilet dye) in bathroom facilities to avoid false-negative test results. Recreational drug use spurs discrepancies over passive or secondhand exposure to otherwise legalized substances (i.e. marijuana), but high cutoff threshold range values double to override both illegitimate positive results and false negatives from occurring. However, lab-based confirmatory testing methodologies employ sophisticated techniques designed to interpret the biochemical makeup of a urine specimen, noting creatinine levels, pH balance grade, and specific gravity variables that may dictate false-negative outcomes. The Construction Owners Association of Alberta (COAA) is aligned with the Department of Transportation (DOT) model, capitalizing on laboratory-based sites to collect urine specimens, mediating the cost-to-benefits ratio against false-negative circumstances where safety-sensitive positions are liabilities.

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