A–Z Glossary

Post-test probability

Post-test probability is the chance of a condition after a test result is known.

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Combining multiple diagnostic methods

Combining multiple diagnostic methods

Why one test is often not enough Diagnostic reasoning in pregnancy starts with the recognition that no single method is perfect. A home urine pregnancy test, a quantitative blood test, and an ultrasound each answer a different question. One detects hormone levels, another estimates whether values are rising appropriately, and another evaluates the presence, location, […]