Expectedness vs Listedness in Pharmacovigilance: Key Differences in ICSR Assessment

Expectedness vs Listedness in Pharmacovigilance: Key Differences in ICSR Assessment

During pharmacovigilance case processing, professionals evaluate several characteristics of an adverse event to determine how it should be assessed and reported. Two terms that are often confused are expectedness and listedness.

Although they are closely related, they are not necessarily interchangeable. Understanding these concepts is important when processing Individual Case Safety Reports (ICSRs), evaluating adverse events, and determining applicable regulatory reporting requirements.

For professionals pursuing a Pharmacoviligance Course in Pune, learning expectedness and listedness provides a stronger foundation for understanding drug safety case assessment.

What Is Expectedness?

Expectedness refers to whether the nature or specificity of a reported adverse event is consistent with the safety information described in the applicable product reference information.

In simple terms, the question is:

"Is this event already described in the relevant safety information?"

The answer depends on the applicable reference document and regulatory framework.

What Is Listedness?

Listedness generally refers to whether an adverse event is included in the relevant product safety information.

The terminology used for listedness and expectedness can differ depending on the regulatory framework, region, and type of safety report.

Therefore, pharmacovigilance professionals should always follow the definitions and procedures applicable to their organization and jurisdiction.

Why Are These Concepts Important?

Determining whether an event is expected or listed can influence the assessment of an ICSR and, depending on applicable requirements, may contribute to determining whether expedited reporting is required.

These concepts can affect:

• ICSR assessment
• Regulatory reporting
• Signal evaluation
• Aggregate reporting
• Safety surveillance
• Benefit-risk evaluation

Incorrect assessment can lead to inappropriate reporting or compliance issues.

Reference Safety Information

To assess expectedness, professionals need to refer to the appropriate product safety information.

Depending on the product and regulatory environment, this may include information such as:

• Prescribing information
• Package information
• Core safety information
• Company reference safety information
• Other applicable regulatory documents

The correct reference document should be identified according to established procedures.

Expected vs Unexpected

An adverse event may be considered expected when its nature and clinical characteristics are consistent with the relevant reference safety information.

An event may be considered unexpected when:

• The event is not described
• The nature of the event differs
• The specificity differs
• The severity or outcome differs in a clinically meaningful way

The exact determination depends on the applicable reference information and regulatory requirements.

Example

Imagine that the product safety information describes a particular adverse reaction.

A report is then received describing the same reaction in a clinically consistent manner.

The event may be considered consistent with the reference information.

However, if the report describes a substantially different clinical manifestation or outcome, additional assessment may be required.

This is why expectedness should not be determined simply by searching for an identical word.

Expectedness Is Not the Same as Causality

These concepts answer different questions.

Causality asks:

"Could the medicinal product have caused or contributed to this event?"

Expectedness asks:

"Is the event consistent with the applicable safety information?"

An event can therefore be:

• Causally related and expected
• Causally related and unexpected
• Not causally related and expected
• Not causally related and unexpected

The two assessments should be considered independently according to applicable procedures.

Expectedness and Seriousness

Expectedness is also different from seriousness.

Seriousness considers whether an event meets defined serious-event criteria.

Expectedness considers whether the event is consistent with relevant safety information.

An adverse event can be serious and expected, or serious and unexpected.

Similarly, a non-serious event can also be expected or unexpected.

Role of the Reference Document

One of the most important aspects of expectedness assessment is using the correct reference document.

Professionals may need to verify:

• Product version
• Country or region
• Relevant safety section
• Effective date
• Event terminology
• Clinical description

Using an outdated or incorrect reference document can lead to an incorrect assessment.

Role of MedDRA

Medical terminology such as MedDRA can help standardize the description and coding of adverse events.

However, coding and expectedness assessment are not the same activity.

A coded medical term may need to be evaluated in its clinical context against the applicable safety information.

This is why pharmacovigilance professionals need both terminology knowledge and clinical understanding.

Expectedness in ICSR Processing

During case processing, the professional may review the reported event and compare it with the applicable reference information.

The assessment should be appropriately documented according to organizational procedures.

If new information is received during follow-up, the expectedness assessment may need to be reviewed again.

Follow-Up and Expectedness

Follow-up information can sometimes change the understanding of an event.

For example, an initial report may provide only a broad description, while additional clinical information may provide a more specific diagnosis.

The updated information may require reassessment against the reference safety information.

This is one reason accurate case follow-up is important.

Regulatory Reporting

Expectedness can be relevant to determining certain expedited reporting requirements, depending on the applicable regulatory framework.

A Regulatory Course in Pune can help learners understand how expectedness, seriousness, causality, and other case characteristics interact with regulatory reporting obligations.

Requirements can vary across regulatory jurisdictions, so professionals should not assume that one reporting rule applies globally.

Connection With Clinical Data Management

Accurate assessment depends on reliable safety data.

A Clinical Data Managment Course in Pune can help learners understand:

• Data validation
• Data consistency
• Standardized terminology
• Database management
• Data quality
• Documentation

Accurate clinical information is essential for correctly evaluating the nature and characteristics of an adverse event.

Common Mistakes

Assuming Every Unlisted Event Is Automatically Caused by the Drug

Expectedness and causality are separate assessments.

Searching Only for Exact Words

Clinical descriptions may differ from the wording in reference information.

Using the Wrong Reference Document

The applicable version and regional reference must be verified.

Confusing Expectedness With Seriousness

A serious event can be expected, and a non-serious event can be unexpected.

Ignoring Follow-Up Information

New clinical information may change how an event should be assessed.

Career Relevance

Knowledge of expectedness and listedness can support professionals working in:

• Pharmacovigilance
• Drug Safety
• ICSR Processing
• Regulatory Affairs
• Safety Surveillance
• Pharmacovigilance Quality
• Aggregate Reporting

Understanding these concepts can help entry-level professionals develop stronger case-processing skills.

Conclusion

Expectedness and listedness are important concepts in pharmacovigilance case assessment. They help professionals determine whether an adverse event is consistent with the applicable product safety information.

These concepts should be evaluated separately from seriousness, severity, and causality because each addresses a different aspect of an adverse event.

For professionals pursuing a Pharmacoviligance Course in Pune, understanding expectedness and listedness provides valuable knowledge for accurate ICSR processing. Combining this expertise with a Clinical Data Managment Course in Pune can strengthen data-quality skills, while a Regulatory Course in Pune can provide broader knowledge of reporting requirements and compliance.

As pharmacovigilance becomes increasingly standardized and data-driven, professionals who understand clinical assessment, safety terminology, regulatory requirements, and data quality will be better prepared for careers in modern drug safety operations.