CAISS Data Quality & Registry Standards 2 — Questions and Answers
Question 1: Which type of data error occurs when an AIS code is entered for an injury that does not match the anatomical region specified?
- Omission error
- Anatomical region mismatch (Correct answer)
- Duplicate entry error
- Severity grade transposition
Correct answer: Anatomical region mismatch
An anatomical region mismatch occurs when the coded injury does not correspond to the body region indicated by the AIS chapter.
Question 2: In trauma registry data quality audits, what is the primary purpose of running a 'logic check' on ISS values?
- To verify patient demographics
- To confirm that ISS is calculated from the three highest AIS scores in different body regions (Correct answer)
- To ensure all injuries are documented in the medical record
- To validate hospital transfer dates
Correct answer: To confirm that ISS is calculated from the three highest AIS scores in different body regions
Logic checks on ISS confirm that scores are derived from the three highest AIS severity scores from three distinct body regions as per the ISS formula.
Question 3: What is the recommended approach when a trauma registry receives incomplete pre-hospital data that affects AIS coding?
- Estimate the missing values based on similar cases
- Code only what is documented and flag the record for incomplete data (Correct answer)
- Exclude the case from the registry entirely
- Use autopsy findings retroactively to fill all gaps
Correct answer: Code only what is documented and flag the record for incomplete data
Best practice requires coding only documented injuries and flagging incomplete records rather than estimating missing clinical data.
Question 4: Which registry standard body publishes guidelines specifically used by US trauma registries to maintain AIS data consistency?
- The American Trauma Society (ATS)
- The Joint Commission (TJC)
- The American College of Surgeons (ACS) (Correct answer)
- The Centers for Disease Control and Prevention (CDC)
Correct answer: The American College of Surgeons (ACS)
The American College of Surgeons Committee on Trauma sets the standards for verified trauma centers including registry data quality requirements.
Question 5: When two coders independently assign different AIS codes to the same injury description, this is classified as a problem with:
- Data completeness
- Inter-rater reliability (Correct answer)
- Record linkage accuracy
- Database schema integrity
Correct answer: Inter-rater reliability
Inter-rater reliability refers to the degree of agreement between different coders assigning codes to the same case.
Question 6: A trauma registry shows a sudden drop in the percentage of cases with complete AIS coding for one month. What is the FIRST step in investigating this issue?
- Retrain all registry staff immediately
- Review whether new software or a dictionary update was implemented that month (Correct answer)
- Notify the ACS and request a site visit
- Delete and re-enter all records from that month
Correct answer: Review whether new software or a dictionary update was implemented that month
Sudden coding pattern changes often correlate with software updates, new AIS dictionary versions, or workflow changes that should be investigated first.
Question 7: What does the term 'data dictionary' refer to in the context of a trauma registry using AIS?
- A glossary of medical terms for patient education
- A standardized reference defining each data element, its format, and allowable values (Correct answer)
- The AIS codebook published by AAAM
- A list of ICD-10 codes mapped to AIS codes
Correct answer: A standardized reference defining each data element, its format, and allowable values
A data dictionary defines each registry field's name, format, valid values, and coding rules to ensure consistent data entry.
CAISS Data Quality & Registry Standards 2
Which type of data error occurs when an AIS code is entered for an injury that does not match the anatomical region specified?