Published: 19 May 2024

False Results in Medical Tests

* False Positive: A test result indicates a disease or condition that is not present.

* False Negative: A test result indicates the absence of a disease or condition that is actually present.

Causes of False Results:

* Certain tests are more prone to false results.
* Incorrect testing procedures can increase the risk.

Accuracy-Affecting Factors:

* Foods and beverages
* Medications
* Stress
* Exercise
* Laboratory protocol variations
* Underlying health conditions

Communicating with Your Provider:

* Discuss any concerns or questions you have about test results.

Reference Populations in Test Analysis:

Defining Reference Populations:

* Age, sex, race, health status, and medical history are used to define the population for comparison.

Testing and Analysis:

* A significant sample of people meeting the criteria (at least 120) is tested under controlled conditions.
* Results are statistically analyzed to determine reference ranges.

Reference Range Determination:

* Reference ranges typically encompass the middle 95% of the reference population's results.
* Labs can establish ranges based on:
* Internal studies
* Data from test manufacturers or other labs
* Existing patient data

Importance of Reference Population Selection:

* Accurately defining the reference population is crucial for establishing meaningful reference ranges.