Quite a lot, as it turns out.

The monitor needs to know when this fatigue started -- not just that it exists at the time of the visit, but whether it began two days ago or two weeks ago. The monitor needs to know how the event was identified -- did the participant volunteer it spontaneously, or did the coordinator elicit it through systematic questioning? The monitor needs to understand what "fatigue" means for this particular participant -- is this an inability to complete household tasks, or an inability to get out of bed? The monitor needs to know whether the severity has changed since the last assessment, what action was taken with the study drug, whether any concomitant medications were administered, and what the current trajectory looks like.

"Participant reports fatigue. Grade 2. Not serious. Possibly related" is a data snapshot. What the safety record requires is a clinical story -- one that begins at onset, continues through each assessment, and ends at resolution. The AE source record is where that story is written. And if it is written incompletely, every downstream record -- the CRF, the safety narrative, the regulatory submission -- inherits that incompleteness.

This lesson teaches you what belongs in the AE source record and how to capture it. You have already learned to identify adverse events (Module 2), grade their severity (Module 3, Lesson 1), assess their seriousness (Module 3, Lesson 2), and understand causality assessment (Module 3, Lesson 4). Now you bring all of that together into a single, structured record that serves as the foundation for everything that follows.

Quite a lot, as it turns out.

The monitor needs to know when this fatigue started -- not just that it exists at the time of the visit, but whether it began two days ago or two weeks ago. The monitor needs to know how the event was identified -- did the participant volunteer it spontaneously, or did the coordinator elicit it through systematic questioning? The monitor needs to understand what "fatigue" means for this particular participant -- is this an inability to complete household tasks, or an inability to get out of bed? The monitor needs to know whether the severity has changed since the last assessment, what action was taken with the study drug, whether any concomitant medications were administered, and what the current trajectory looks like.

"Participant reports fatigue. Grade 2. Not serious. Possibly related" is a data snapshot. What the safety record requires is a clinical story -- one that begins at onset, continues through each assessment, and ends at resolution. The AE source record is where that story is written. And if it is written incompletely, every downstream record -- the CRF, the safety narrative, the regulatory submission -- inherits that incompleteness.

This lesson teaches you what belongs in the AE source record and how to capture it. You have already learned to identify adverse events (Module 2), grade their severity (Module 3, Lesson 1), assess their seriousness (Module 3, Lesson 2), and understand causality assessment (Module 3, Lesson 4). Now you bring all of that together into a single, structured record that serves as the foundation for everything that follows.