What is the appropriate approach to discordant data from different information sources during CDM?

• A. Recheck data, seek objective verification, consider alternative explanations, and update the differential.
• B. Discard the data with which you disagree.
• C. Ignore the discordance.
• D. Choose one source and ignore others.

Answer: (A)

When information from different sources disagrees, the best approach is to recheck the data, seek objective verification, consider alternative explanations, and update the differential accordingly. This means verifying the accuracy of each data point (repeat tests if needed, cross-check records, and use objective measures), thinking through why the discordance occurred (timing, measurement error, data entry mistakes, or atypical presentations), and adjusting the differential diagnosis to reflect the new, more reliable understanding. This approach preserves data integrity, reduces bias, and helps prevent missed or incorrect management.

Discarding data, ignoring discordance, or selecting one source while excluding others can introduce bias and overlook important clues that affect patient care.