Biostats Calculator

Features > Diagnostic test utility

Diagnostic or screening tests are used to estimate the presence or absence of a condition in patients. The statistical characteristics of these tests affect their utility and interpretation in different circumstances. These characteristics can be calculated based on a sample of individuals for whom both test results, and actual condition presence or absence, are known.

After selecting Diagnostic utility from the menu, simply enter the number of individuals falling into each category.

Biostats Calculator reports:

• the sensitivity of the test
• the specificity of the test
• the false positive and false negative result rate
• the positive and negative predictive value
• the positive and negative likelihood ratio

Biostats Calculator can perform this test and 11 others from the convenience of your iPhone or iPod Touch. Buy it today!