CEBM Home Page Index to this Site How to Use this Site Teaching Resources and Activities The CAT Bank About the Book <I>How to Practice and Teach EBM</I> EBM Glossary The EBM Toolbox

Samples of Pretest Probabilities

Inclusion criteria for these data.

Patient ProblemClinical SettingTarget DisorderPretest Probability
Melena in a 50-year-old man who drinks 25 units of alcohol a week but has no stigmata of liver disease. A&E Department in USA Varices 5%
Benign ulcer 55%
Gastritis 40%
Symptomless 60-69 year-olds. Primary Care Undiagnosed colon cancer:
all patients0.5%
positive family history 1.5%
Symptomless:
Woman: 30-39 y/oPrimary Care>=75% stenosis of one or more coronary arteries0.3%
Woman: 60-69 y/o8%
Man: 30-39 y/o2%
Man: 60-69 y/o12%
Non-anginal chest pain:
Woman: 30-39 y/oPrimary Care>= 75% stenosis of one or more coronary arteries1%
Woman: 60-69 y/o19%
Man: 30-39 y/o5%
Man: 60-69 y/o28%
Atypical angina:
Woman: 30-39 y/oPrimary Care>= 75% stenosis of one or more coronary arteries4%
Woman: 60-69 y/o54%
Man: 30-39 y/o22%
Man: 60-69 y/o67%
Typical angina:
Woman: 30-39 y/oPrimary Care>= 75% stenosis of one or more coronary arteries26%
Woman: 60-69 y/o91%
Man: 30-39 y/o70%
Man: 60-69 y/o94%
Symptomless 50 y/o with a solitary pulmonary nodule. Primary CareCancer:
for any nodules50%
for 3cm nodules65%


To add to this collection, click on the comment icon below: