6.8 Optional Parameters

Optional Parameters

As stated in previous sections there are a number of different types of parameters that can be defined in the i2b2 Administration module. Depending where they are defined will determine how the i2b2 behaves. Here is a recap of the different types of parameters.

The sections that follow will contain information about additional parameters that can be entered into the i2b2 Administration Module.

6.8.1 Unit Conversion for Numerical Observations

Unit Conversion for Numerical Observations

In the OBSERVATION_FACT table the UNIT_CD column stores the unit value for your numerical observations. An example of a value in UNIT_CD would be mg for milligram or gm for gram.

Although i2b2 recommends the units be normalized to a single unit we also recognize this is not always possible. In this instance, you may wish to have the units converted automatically when running a query in which a value constraint is defined. To turn this feature on you would add the following parameter to the Project you want it applied.

Type of Parameter: Project Parameter

Parameter Name: CRC_ENABLE_UNITCD_CONVERSION

For steps on how to add a project parameter please see the section titled Add Project Parameters located in this chapter.

6.8.2 Enable Process Timing

Enable Query Processing Steps and Timing

In the i2b2 Web Client when you run a query the length of time it takes to run the query will display in Query Status. A project parameter can be added that will expand the timing information that is displayed.

Type of Parameter: Project Parameter

Parameter Name: PM_ENABLE_PROCESS_TIMING

For steps on how to add a project parameter please see the section titled Add Project Parameters located in this chapter.