Skip to content

Differential Diagnosis

Definition
AI-generated

Differential diagnosis is the structured process of weighing alternative explanations for a patient’s presentation—using history, exam, tests, and prior probabilities—before settling on the most likely condition(s).

Topics
Epidemiology
Related
Case-Control Study Cohort International Classification of Diseases Code (ICD)

Why it matters in GWAS

Case definitions in EHR and registry studies inherit diagnostic uncertainty; misclassification across similar entities (e.g. subtypes, comorbid labels) attenuates signals and biases PheWAS and multi-trait models. Explicit phenotyping rules and code mapping (e.g. ICD, PheCode) partly operationalize differential-diagnostic distinctions at scale.

Example usage

"The phenotype algorithm used laboratory values in the differential diagnosis between type 1 and type 2 diabetes in claims data."

Case-Control Study Cohort International Classification of Diseases Code (ICD) PheCode Phenome-Wide Association Study (PheWAS) Phenotype Precision Medicine
Related-term network

Click any node to open that term page.

Node order. The current term is first. Next come every page linked from Related terms, in the same top-to-bottom order as that list. Then new terms appear in two-hop layers: for each of those direct neighbors (in that same order), their related terms are appended if not already listed. A third pass does the same for two-hop nodes. The walk stops when a fixed maximum number of nodes is reached.

References

  • Richardson WS, et al. (2000). Users’ guides to the medical literature: XV. How to use an article about disease probability for differential diagnosis. JAMA.
← Dicentric chromosome Differential expression analysis →

Last updated (UTC · Git history)