Autoimmune Disease Phenotype

Autoimmune diseases (AID) refer to destructive conditions involving an aberrant chronic activation of the adaptive immune system, where the immune cells instead of producing antibodies to attack foreign invaders, mistakenly attack the body’s own healthy cells.  While autoimmune diseases are heterogeneous according to symptoms, lesion types, and prognosis, and are usually studied in isolation according to groups based on organ system; various autoimmunity diseases share similar immune effector mechanisms.  Recent genetic studies suggest that many autoimmune and chronic autoinflammatory condi

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Breast Cancer

Chronic Kidney Disease

Chronic kidney disease (CKD) is defined as an abnormality of kidney structure or function present for longer than 3 months. CKD can occur as a result of heterogeneous disorders affecting the kidney. In the United States, an estimated 13.6% of adults have CKD. Notably, adjusted mortality rates are higher for patients with CKD than those without, and rates increase with CKD stage. The purpose of this algorithm is to enable accurate CKD diagnosis and staging based on EHR data.

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Clopidogrel Poor Metabolizers

Note: Attached documents contain full case definition and two different control definitions.  One is for controls with 2 years of follow up, the other for controls with 1 year of follow up.  All available controls with 2 years of follow up were used in Vanderbilt's study.  The control population was supplemented by controls with only 1 year of follow up.  At the time of study, many of the available controls had experienced their qualifying events somewhat recently and 2 years had not yet passed for full follow up.



Clostridium Difficile Colitis

Clostridium difficile, also known as "C. diff," is a species of bacteria that causes severe diarrhea and other intestinal disease when competing bacteria in the gut have been wiped out by antibiotics (see Wikipedia entry). In rare cases a C. diff infection can progress to toxic megacolon which can be life-threatening. In a very small percentage of the adult population C. difficile bacteria naturally reside in the gut. Other people accidentally ingest spores of the bacteria while patients in a hospital or nursing home.



Drug Induced Liver Injury

An algorithm to identify inpatients who have had an acute episode of drug induced liver injury (DILI).

Summary of drug-induced liver injury algorithm

Inclusion criteria

A. Suspect DILI? (NOTE: baseline population is institution specific.  See institution implementation details)

1.     Liver injury AND Exposure to drug (NOTE: medications are institution specific. See institution implementation details)

2.     Temporal relationship of exposure to drug and liver injury diagnosis.

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