_CalculateBMI

Calculates the Body-Mass Index, based on height and weight.

Syntax

_CalculateBMI(height,weight)

Parameters

Parameter	Definition	Data type
height	Height of the subject, in centimeters.	Float
weight	Weight of the subject, in kilograms.	Float

Returns

BMI measurement (Float).

Notes

• The Body-Mass index is calculated using the following formula:

      weight / (height * height)

• Height is assumed to be in centimeters, and weight is assumed to be in kilograms.

Exceptions

An exception of type Argument Exception is returned if the height measurement equals zero. This exception results in:

• Failure of the rule execution.
• An Oracle Health Sciences InForm Server Error in the Oracle Health Sciences InForm client application.
• An entry in the Event log on the Oracle Health Sciences InForm server computer.

Example

The following rule is created at the form level on the Vital Signs form, which has items Weight and BMI. The rule also refers to the item Ht in a mapping called RulesLS.

Note:

Oracle recommends that you include rule logic to clear the calculated value if a referenced item value is cleared. For example, if a rule calculates BMI based on the values entered in the Height and Weight items, the rule should clear the BMI value if the data in the Height item is deleted. For an example of the appropriate rule logic, see Sample data-entry rules that use methods.

evaluate on Form Submission
    value = _CalculateBMI (RulesLS.DSRules.Ht.Value, this.Weight.Value)
always
    set this.BMI.Value = value