CCDM Data Validation 3 — Questions and Answers
Question 1: In an EDC system, what is the function of a 'hard stop' edit check?
- It permanently locks the field after the first entry
- It prevents the user from saving the record until the invalid entry is corrected (Correct answer)
- It sends an automatic query to the site monitor
- It flags the field for manual review by the data manager
Correct answer: It prevents the user from saving the record until the invalid entry is corrected
A hard stop edit check prevents the data entry operator from saving or advancing past a field until the entered value satisfies the validation rule.
Question 2: What is the key difference between a 'soft' edit check and a 'hard' edit check in clinical data management?
- Soft checks are automated; hard checks require manual review
- Soft checks issue a warning but allow data saving; hard checks block saving until resolved (Correct answer)
- Soft checks apply to lab data only; hard checks apply to CRF data
- Soft checks are created by sponsors; hard checks are mandated by regulations
Correct answer: Soft checks issue a warning but allow data saving; hard checks block saving until resolved
Soft edit checks alert the user to a potential issue but allow the record to be saved with an override or explanation, while hard edit checks prevent saving until the error is corrected.
Question 3: Which document formally describes all programmed edit checks for a clinical trial database?
- Data Management Plan (DMP)
- Edit Check Specifications (ECS) (Correct answer)
- Case Report Form Completion Guidelines
- Data Transfer Agreement
Correct answer: Edit Check Specifications (ECS)
The Edit Check Specifications document formally defines the logic, parameters, and expected behavior of all programmed validation checks in the clinical database.
Question 4: Laboratory normal ranges used in clinical trial edit checks should ideally be sourced from which location?
- The sponsor's internal research database
- The central laboratory providing services for the trial (Correct answer)
- The ICH guidelines directly
- Published medical textbooks
Correct answer: The central laboratory providing services for the trial
Normal reference ranges should come from the specific central laboratory performing the assays, as ranges vary by lab methodology, equipment, and population.
Question 5: What is the purpose of a 'derivation check' in clinical data validation?
- To confirm that derived or calculated fields are computed correctly from their source variables (Correct answer)
- To verify that data was derived from the correct source document
- To check that the investigator's signature was derived properly
- To ensure that the dataset derivation follows SDTM mapping rules
Correct answer: To confirm that derived or calculated fields are computed correctly from their source variables
A derivation check validates that programmatically calculated fields, such as BMI from height and weight, produce the mathematically correct result.
Question 6: When a query is issued to a clinical site regarding a data discrepancy, what should the site's response include?
- Only the corrected value with no further documentation
- A correction or clarification with appropriate source document justification (Correct answer)
- A written explanation submitted directly to the regulatory authority
- Automatic data overwrite by the site monitor
Correct answer: A correction or clarification with appropriate source document justification
Sites must respond to queries with a data correction or clinical clarification supported by source documentation to maintain an auditable data trail.
Question 7: Which CDISC standard is most directly used to define the structure and terminology of clinical data for regulatory submission after validation?
- CDASH
- SDTM (Correct answer)
- ADaM
- ODM
Correct answer: SDTM
The Study Data Tabulation Model (SDTM) defines the standard structure and terminology for organizing collected clinical trial data submitted to regulatory agencies like the FDA.
CCDM Data Validation 3
In an EDC system, what is the function of a 'hard stop' edit check?