What are Cut-Off Levels and what do they represent?
The cut-off level of a test is the level at which a negative result becomes positive. The cut-off level is measured as a concentration (ng/mL). If the concentration of a drug in the sample is higher than the cut-off level, a positive result is returned (absence of line at the test line area). If it is below the cut-off level a negative result is returned (any indication/presence of a line at the test area). Cut-off levels should not be taken to represent an “impairment threshold”, their purpose is to make sure that any positive test is the result of active drug taking by the donor rather than through accidental exposure. The cut-off levels of our tests are in accordance with the international standards set by SAMHSA. Note: It is not advisable to confirm a POC test with a laboratory screening test as compounds screened for and cut-off levels may vary.
The cut-off level of a test is the level at which a negative result becomes positive. The cut-off level is measured as a concentration (ng/mL). If the concentration of a drug in the sample is higher than the cut-off level, a positive result is returned (absence of line at the test line area). If it is below the cut-off level a negative result is returned (any indication/presence of a line at the test area). Cut-off levels should not be taken to represent an “impairment threshold”, their purpose is to make sure that any positive test is the result of active drug taking by the donor rather than through accidental exposure. The cut-off levels of our tests are in accordance with Australian Standards AS4308.
