diff --git a/studies_base/models/study_participant.py b/studies_base/models/study_participant.py
index 0b9a675..260a918 100644
--- a/studies_base/models/study_participant.py
+++ b/studies_base/models/study_participant.py
@@ -18,4 +18,7 @@ class StudyParticipant(models.Model):
         
     identifier = fields.Char("Idientifiants de l'enrôlement", readonly=True)
 
+    created = fields.Datetime("Date de création")
+    updated = fields.Datetime("Date mise à jour")
+
     
diff --git a/studies_base/models/study_questionnaire_response.py b/studies_base/models/study_questionnaire_response.py
index 26548e6..4a258bd 100644
--- a/studies_base/models/study_questionnaire_response.py
+++ b/studies_base/models/study_questionnaire_response.py
@@ -19,4 +19,7 @@ class StudyQuestionnaireResponse(models.Model):
     
     source = fields.Many2one("res.partner", string="Contact", domain=[("category_patient",'=',1)], readonly=True)
     firstname = fields.Char("Prénom", related="source.firstname")
-    lastname = fields.Char("Nom", related="source.lastname")
\ No newline at end of file
+    lastname = fields.Char("Nom", related="source.lastname")
+
+    created = fields.Datetime("Date de création")
+    updated = fields.Datetime("Date mise à jour")
\ No newline at end of file