This code system http://hl7.org/fhir/research-study-status defines the following codes:

CodeDisplayDefinition
draftDraftThe study is undergoing design but the process of selecting study subjects and capturing data has not yet begun.
in-progressIn-progressThe study is currently being executed
suspendedSuspendedExecution of the study has been temporarily paused
stoppedStoppedThe study was terminated prior to the final determination of results
completedCompletedThe information sought by the study has been gathered and compiled and no further work is being performed
entered-in-errorEntered in errorThis study never actually existed. The record is retained for tracking purposes in the event decisions may have been made based on this erroneous information.