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Initial Considerations
The Piping feature allows users to inject previously collected data into text on a data collection form or survey, thus providing greater precision and control over question wording. It can also be used in other ways, such as for customizing survey invitations (e.g. by including the respondent's name in the email) or survey acknowledgments (e.g. thanking your respondent by name after completing a survey).
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- Create variable that collects the patient's name similar to the following:
Variable: patient
What is the patient's name?
- Next, to use the patient's actual name within the text of the next question specify a field label that embeds the variable name "patient" within square brackets similar to the following:
Variable: doctor
What is the name of [patient]'s doctor?
- In the edit field dialog, the field label might look similar to the following:
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Additional Considerations
Piping is useful in Longitudinal Projects when you want to reference a participant’s demographic information in separate events. You need to indicate where the information you want to pipe is located by using the variable name AND unique event name. For example:
- The variable name = “dob”
- The variable is located in the “baseline” event (unique event name is “baseline_arm_1”)
- Combine these two pieces: [unique event name][variable name]
For example, [baseline_arm_1][dob]
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