Most drugs of abuse are reported qualitatively. That is, the patient sample is reported as ‘Positive’ or ‘Negative’. Labs may also report semi-quantitative values with multiple calibrator levels (Usually five or more, including a zero). These are often reported in ng/mL. For labs that use a zero and one calibrator, often at the cut-off, Unity offers special units for reporting these values, based on the manufacturer. Please contact your QCProgram representative and provide the Instructions For Use (IFU))/product insert.