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Laboratory Comparison Report

The Laboratory Comparison Report is one of the Unity™ Interlaboratory Reports and shows the monthly and cumulative statistics for the laboratory, Peer group, and Method group for all tests reported. The Laboratory Performance Overview Report is automatically generated each month you submit data; however, you can specify a different report frequency. See "Configure Unity™ Interlaboratory Report Frequency" for more information.

Use the Laboratory Comparison Report to compare results to those of the Peer and Method consensus groups. For VITROSâ instruments, the Laboratory Comparison Report provides statistics for the laboratory, Peer group, and Method group based on the slide generation numbers reported for the laboratory.

The Laboratory Comparison Report contains the following monthly and cumulative statistics for each test:

• Laboratory mean
• Laboratory SD
• Laboratory CV
• Number of points reported by the laboratory
• CVR for the Peer and Method groups
• SDI for the Peer and Method groups

The Laboratory Comparison Report also contains the monthly and cumulative Peer and Method group statistics for:

• Mean
• SD
• CV
• Number of points reported
• Number of laboratories reporting

Laboratory Histogram Report

The Laboratory Histogram Report is one of the Unity™ Interlaboratory Reports and is a bar chart showing up to a 12 month summary of the laboratory's monthly means against the current cumulative consensus group means ±2SD range. The Laboratory Histogram Report is automatically generated each month you submit data; however, you can specify a different report frequency. See "Configure Unity™ Interlaboratory Report Frequency" for more information.

The report shows the laboratory's mean, SD, CV, and number of points for each bar. Each level of control has a separate bar chart.

The Laboratory Histogram Report provides a visual comparison which is useful to identify shifts (abrupt changes in values) and trends (gradual changes in values).

Laboratory Performance Overview Report

The Laboratory Performance Overview Report is one of the Unity™ Interlaboratory Reports and allows you to visually evaluate the bias and imprecision for each test compared to the Peer and Method consensus groups on a modified Youden Chart. The Laboratory Performance Overview Report is automatically generated each month you submit data; however, you can specify a different report frequency. See "Configure Unityä Interlaboratory Report Frequency" for more information.

The SDI and CVR are combined as X-Y coordinates located within one of three performance zones designated by increased levels of shading:

• No shading

  Acceptable performance.

• Slight shading

  Acceptable to marginal performance. This may indicate the need to investigate test system bias and imprecision.

• Darkest shading

  Outside of acceptable and marginal performance.
  Corrective action may be needed.

• Outside of graph

  Unacceptable performance.
  Requires corrective action.

The center of the graph (SDI and CVR both equal to zero) represents perfect agreement between the laboratory's values and the consensus group (Peer or Method) statistics. Bias and imprecision increase as values move further away from the center of the graph.

level

When referring to QC materials, level refers to the concentration of analytes within the control material. Controls are usually bi-level (low and high) or tri-level (low, normal, and high).

levels in use

The levels of a control product used in the laboratory (for example, level 1, level 2, level 3). Unused levels of a control material are omitted from intralaboratory and Unity™ Interlaboratory Reports.

Levey-Jennings Chart

A graphical chart used to plot successive quality control results, either day-to-day or run-to-run.