A test used to determine the risk of a woman having a baby with an abnormality.

A test designed to identify subjects who are at sufficient risk of a specific disorder to benefit from further investigation or preventive action, among those who have not sought medical attention on account of symptoms of that disorder.

a blood test that looks for a specific tumor marker

a preliminary procedure administered to distinguish individuals who may need further evaluation for a disorder from those who are less likely to need additional testing

a procedure that is performed to detect the presence of a specific disease

a test applied to the general population to detect a disease that could not otherwise be detected)

a test used to evaluate a population of people for a specific disease without anyone being evaluated ever having any symptoms or signs related to the specific disease

A screening test makes broad categorizations as a first step in a selection or diagnostic process in school or industry.

A test performed to detect a disease or condition in a client presenting for a routine exam, with no symptoms or risk history indicating chlamydia, as distinguished from a diagnostic test.

A test that looks for possible signs of disease in people who do not have symptoms.

A test performed to detect chlamydia in a patient presenting for a routine exam, with no symptoms or known exposure indicating chlamydia infection is likely, as distinguished from a diagnostic test.

A test that encompasses a wide range of possible contaminants. Examples are: TOX, TOC, and VOA. See also indicator tests.

a procedure use for the early detection of precancerous lesions of cancer growth in individuals who have not yet developed symptoms.

"Screening tests" are tests used to check, or screen, for disease when there are no symptoms. Screening tests for colorectal cancer include: fecal occult blood test, flexible sigmoidoscopy, colonoscopy, and double contrast barium enema. (When a test is performed to find out why symptoms exist, it is called a "diagnostic" test).

test used to detect cell changes which could potentially become cancer if left untreated.

An abbreviated toxicity test with one or two toxicant concentrations. Some Regional and State effluent biomonitoring programs stipulate its use. If lethality is observed in the screening test, a definitive test may be required.

A test or procedure used to detect disease in a person who does not have any symptoms of that disease.

a simple, cheap test used to determine if there is reason to do a more complicated confirmation test.

A test given to groups of people to sort out those who need further evaluation.