This case-sensitive code system
http://hl7.org/fhir/research-study-objective-type
defines the following codes:
Code
|
Display
|
Definition
|
primary
|
Primary |
The main question to be answered, and the one that drives any statistical planning for the study—e.g., calculation of the sample size to provide the appropriate power for statistical testing. |
secondary
|
Secondary |
Question to be answered in the study that is of lesser importance than the primary objective. |
exploratory
|
Exploratory |
Exploratory questions to be answered in the study. |