A 54-year-old man with hypertension and hyperlipidemia who arrived to the ER with chest discomfort wants to know if he is experiencing a heart attack. Test A has just been accessible for the diagnosis of myocardial infarction (MI). The findings of test A (when compared to a gold standard diagnosis of MI) were as follows in a recent study: Test A yielded a good result for the patient. What is the likelihood that the patient gets a MI if his pre-test probability is equal to the prevalence of MI in the study?

Question

A 54-year-old man with hypertension and hyperlipidemia who arrived to the ER with chest discomfort wants to know if he is experiencing a heart attack. Test A has just been accessible for the diagnosis of myocardial infarction (MI). The findings of test A (when compared to a gold standard diagnosis of MI) were as follows in a recent study:   Test A yielded a good result for the patient. What is the likelihood that the patient gets a MI if his pre-test probability is equal to the prevalence of MI in the study?

Quizplus · Accepted Answer

Eductional Objective: Positive predictive value represents the probability of truly having a disease given a positive test result. It increases with increasing disease prevalence and decreases with decreasing disease prevalence.

A 54-Year-Old Man with Hypertension and Hyperlipidemia Who Arrived to the ER