Investigations

 

Bedside

Bedside

Vitals

Vitals

 

Pathology

Path

Microbiology

Micro

Imaging

Imaging

 

 

-  True Positives

-  Number of tests which correctly identify disease

-  False Positives

-  Number of tests which falsely identify disease

-  True Negatives

-  Number of tests which correctly exclude disease

-  False Negatives

-  Number of tests which falsely exclude disease

-  Sensitivity

-  Definition: number of true positives / (number of true positives + number of false negatives)

-  = people w disease who test positive / people w disease

-  Ability to identify positive results (people w disease)

-  Negative result for a test w high sensitivity suggests true negative

-  100% sensitivity means all positive results are true positives (no false negatives)

-  Specificity

-  Definition: number of true negatives / (number of true negatives + number of false positives)

-  = people wo disease who test negative / people wo disease

-  Ability to identify negative results (people wo disease)

-  Positive result for a test w high specificity suggests true positive

-  100% specificity means all negative results are true negatives (no false positives)

-  Ordering Tests

-  Should be ordered for specific purpose

 

 

Tests