Period units

The Period Units slider is used to apply a time period against the 1st parameter in your rule line. It appears when an Operator control is added to the Rule    The units can be varied and the period of time can be in the future or in the past.

The example above is looking for the latest recording of Asthma in the last 4 months (The months period has been defined in the Rule properties)

The rule does the following:

• Take todays date today

•  -4 months from it.

•  The >= control says from that exact date and going forward

• Look for the latest

• Asthma

Changing the Period units

• Add your codeset, Operator, parameter and 2nd Codeset if applicable to your Rule Line.

This then activates the period Units slider. The default unit is zero and the period is months

• Right mouse click on the which will open an inline menu.

• On the Rule section of the inline menu, select Properties

This will open up the Properties for the selected Rule Line.

The Period units properties of the Rule are set to the default setting > x <

• Change the Period units criteria as required and click OK.

Moving your mouse over the period units slider will pop up the select underlying period