Sensitivity & Specificity

False-Positive

75% of the population tested have tested negative for lyme disease. 10% have tested positive but in reality are negative. The term for the 10% of people would be__________

Validity

Homan's Test is less accurate than US to determine DVT. This would lead you to question the __________ of the Homan's Test.

Validity

How closely a given observation agrees with "the true state of affairs" or the best possible measure of reality

Predictive Value

How well a given symptom, sign or test result (either negative or positive) predicts the presence or absence of disease.

Reliability

How well repeated measurements of the same relatively stable phenomenom will give the same results, also known as precision. May be measured for one observer or for more than one observer.

Sensitivity

If the group of people took a urine test for pregnancy and only 50% out of the actual (pregnant) 95% were found to be pregnant. Then the findings of this test would find that the urine test was found to have a low ________________.

Low

If the sensitivity findings of a test is high, then the specificity of the same test would be ___________.

High

If the specificity findings of a test is low, then the sensitivity of the same test would be __________.

Reliability

Mary has been assessed every 3 months for a chronic condition using the same test but by different observers. They all get the same results. This is an example of ___________.

Negative Predictive Value

PROBABILITY of NOT having the condition or disease when the test is NEGATIVE or (normal) OR the PROPORTION of "true negatives" out of the total population tested.

Positive Predictive Value

PROBABILITY of disease in a pt with a positive (abnormal) test OR the PROPORTION of "true positives" out of the total population tested.

Sensitivity

PROPORTION of people who test POSITIVE in a group of people KNOWN to have the disease or condition OR the group of people who are TRUE POSITIVES compared with the total # of people who actually have the disease.

Specificity

Several of the patients have undergone testing for PPD. All patients except for one are negative and do not have TB. The test for PPD would be considered to have a high__________

Specificity

The PROPORTION of people who test NEGATIVE within a group of people known to be WITHOUT a given disease or condition OR the proportion of people who are TRUE NEGATIVES compared with the total # of people without the disease.

SpPIN

When Specificity is high, a Positive test result rules IN the target disorder. What is the acronym?

SnNOUT

When the Sensitivity of a symptom or sign is high a NEGATIVE response rules OUT the target disorder. What is the acronym?

Sensitivity

You know that the patient has a diagnosis of the disease. What is the chance that the given test will show that the patient is positive for the disease?

Specificity

You know that your patient does not have the disease. What is the chance that the given test will show that the patient is negative for the disease?