Range of acceptable values for a typical patient, when applicable.

Drugs that affect the test's results.

A subject of the study, i.e. one of the medical conditions, therapies, devices, drugs, etc. investigated by the study.

The location in which the study is taking/took place.

A person or organization that supports a thing through a pledge, promise, or financial contribution. E.g. a sponsor of a Medical Study or a corporate sponsor of an event.

Any characteristics of the population used in the study, e.g. 'males under 65'.

Expected or actual outcomes of the study.

A diagnostic test that can identify this sign.

A physical examination that can identify this sign.

The type of the medical article, taken from the US NLM MeSH publication type catalog. See also [MeSH documentation](http://www.nlm.nih.gov/mesh/pubtypes.html).

The algorithm or rules to follow to compute the score.

The condition, complication, etc. influenced by this factor.

A modifiable or non-modifiable risk factor included in the calculation, e.g. age, coexisting condition.

The condition, complication, or symptom whose risk is being estimated.

The type of procedure, for example Surgical, Noninvasive, or Percutaneous.

Typical preparation that a patient must undergo before having the procedure performed.

How the procedure is performed.

Typical or recommended followup care after the procedure is performed.

Specifics about the observational study design (enumerated).

Strength of the guideline's recommendation (e.g. 'class I').

The medical conditions, treatments, etc. that are the subject of the guideline.

Date on which this guideline's recommendation was made.

Source of the data used to formulate the guidance, e.g. RCT, consensus opinion, etc.

Strength of evidence of the data used to formulate the guideline (enumerated).