Transcript:

• Castor supports field dependency or field logic
• In other words, it is possible to show or hide a field based on the previously given answers.
• For example, data on pregnancy which should only be collected for female patients.
• To add a dependency for a field, open the Dependencies tab.
• Dependent fields are only shown if the specified condition is met.
• Here you can set the current field to depend on the response added to another field.
• A Calculation field can be used to set up an advanced dependency, such as dependency on multiple fields or multiple responses to a single question.
• A question will appear only when answers to several previous questions match certain criteria
• In this study, when collecting data on the subject’s tobacco consumption, I would like to collect data on the number of packs consumed per year only for current or former smokers
• First, I create a radio button field Tobacco consumption which can be answered with the following options: Non-smoker with the value of 1, Former smoker with the value of 2, and the Actual smoker with the value of 3.
• I will also create a number field to collect the data on the number of packets consumed per year
• Next, we create a calculation field after the Tobacco consumption field
• Since this field is only used to create an advanced dependency, this field should be hidden
• In this calculation field I am using if-else logic to check the conditions
• If the field tobacco consumption is answered as former smoker with the value 2 or as actual smoker with the value of 3, the calculation will output a value of 1. If the consumption field is answered as a non-smoker, the output will be 2.
• The calculation uses the logical OR operator (double vertical line) to check if one of two conditions are met.
• Finally, click on the field which should be dependent and navigate to the Dependencies tab.
• In the Dependency on field, choose the calculation field which you have just created
• If the calculation field has a value of 1, the number of packets should be displayed
• We can test this calculation by opening a record and entering responses into the fields.