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Ectopic Pregnancy: Sensitivity and Specificity

Introduction: See Pregnancy for beta-hCG diagnostic test accuracies.

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Prevalence

Population / CalculatorPrevalence Comments / Study / Link
Pregnancies 2% http://www.utdol.com/online/content/topic.do?topicKey=gen_gyne/6639
Women presenting to ED with first trimester bleeding, pain, or both 12% 6-16%

http://www.utdol.com/online/content/topic.do?topicKey=gen_gyne/6639

More, Edit...

The sensitivity and specificity of findings for Ectopic Pregnancy are listed below. See the left navigation bar to change the display.

Pre-Test Probability (Prevalence): %. Post-Test Probability (Predictive Value): %. Switch to display mode.
**Note that calculating probabilities from more than one finding is inherently inaccurate because findings are not independent. (For example, using two positive findings that share a common pathogenesis is likely to overestimate the true probability.)
Specific Findings
FindingResult SensitivitySpecificity
[ + ] Trans-Vaginal Ultrasound + 0 - 74%100%
[ + ] Adnexal Mass + 0 - 9%96%
[ + ] Cervical motion tenderness + 0 - 45%91%
Poorly Diagnostic Findings
FindingResult SensitivitySpecificity
[ + ] Adnexal tenderness + 0 - 61%65%