Diagnostic accuracy

The total proportion of "true" findings by a diagnostic test in a given population

The total diagnostic accuracy of a test can be calculated as well using the 2x2 table. With total diagnostic accuracy, researchers are comparing the "true" findings (true-positive and true-negative) to all possible diagnostic findings (true-positive, true-negative, false-positive, and false-negative). 
We use this part of the 2x2 table to calculate diagnostic accuracy:
Diagnostic accuracy is focused on the participants that received the correct diagnostic test result as related to the
Here are the formulae for sensitivity, specificity, PPV, NPV, and diagnostic accuracy:
Diagnostic accuracy is the proportion of participants that received the correct test result as identified by the
Diagnostic accuracy and diagnostic testing calculations

Diagnostic testing downloads

Click on the Download Database button for a database structured for diagnostic testing data. Click on the Download Calculator button to download a free diagnostic testing calculator. 
Download Database
Download Calculator
Back to Diagnostic Testing
Research Engineer Home Page

Hire A Statistician - Statistical Consulting for Students

$75.00
Buy Now

DO YOU NEED TO HIRE A STATISTICIAN?

Eric Heidel, Ph.D. will provide the following statistical consulting services for undergraduate and graduate students at $75/hour. Secure checkout is available with Stripe, Venmo, Zelle, or PayPal.


  • Statistical Analysis 
  • Research Design
  • Sample Size Calculations
  • Diagnostic Testing and Epidemiological Calculations
  • Survey Design and Psychometrics