Level 152
Level 154

#### 36 words 0 ignored

Ready to learn
Ready to review

## Ignore words

Check the boxes below to ignore/unignore words, then click save at the bottom. Ignored words will never appear in any learning session.

**Ignore?**

Identifying the presence of a disease

The definition of diagnosis

Reference standard

The criteria for confirmation of a diagnosis

Validation study

A type of study that compares a diagnostic test against its reference standard

True positive

If a disease is present, and the diagnostic test is positive, then the result is a [_______]

False positive

If a disease is absent, and the diagnostic test is positive, then the result is a [_______]

False negative

If a disease is present, and the diagnostic test is negative, then the result is a [_______]

True negative

If a disease is absent, and the diagnostic test is negative, then the result is a [_______]

Sensitivity

The proportion of people with a disease who have a positive test result

Specificity

The proportion of people without a disease who have a negative test result

Positive predictive value

Diagnosis: How accurate the positive test is

Negative predictive value

Diagnosis: How accurate the negative test is

Accuracy

The proportion of people with the correct test result

Prevalence

The proportion of people who have the disease in the study population

A

Diagnosis Calculations: true positive is [_]

B

Diagnosis Calculations: false positive is [_]

C

Diagnosis Calculations: false negative is [_]

D

Diagnosis Calculations: true negative is [_]

___________________ A / (A+C)

The calculation for calculating sensitivity

___________________ D / (B+D)

The calculation for calculating specificity

___________________ A / (A+B)

The calculation for calculating positive predictive value

___________________ D / (C+D)

The calculation for calculating negative predictive value

___________________ (A+D) / Total

The calculation for calculating accuracy

___________________ (A+C) / Total

The calculation for calculating prevalence

Positive likelihood ratio

Diagnosis: A measure of how much more likely it is for a positive test to occur in a person with a disease

Negative likelihood ratio

Diagnosis: A measure of how much more likely it is for a negative test to occur in a person free from a disease

Post-test probability

Diagnosis: The likelihood that a person actually has or doesn't have a disease, based on their test result

Pre-test probability

Diagnosis: The likelihood that a person actually has or doesn't have a disease, based on prevalence in society

Positive and in

When a sign, test or symptom has an extremely high SPECIFICITY (say, over 95%), a [______] result tends to rule [___] the diagnosis

Negative and out

When a sign, test or symptom has an extremely high SENSITIVITY (say, over 95%), a [______] result tends to rule [___] the diagnosis

Pregnancy test

Example of a diagnostic test with a high specificity

Faecal occult blood test

Example of a diagnostic test with a high sensitivity

Specificity

A pregnancy test has a high [sensitivity/specificity]

Sensitivity

A faecal occult blood test has a high [sensitivity/specificity]

Sensitivity

A brain natriuretic peptide has a high [sensitivity/specificity]

Sensitivity

A loss of retinal vein pulsation has a high [sensitivity/specificity]

Specificity

3 or more yes on CAGE has a high [sensitivity/specificity]