Causes of nonemergent chest pain in Michigan Research Network (MIRNET) primary care practices

Cause	Prevalence, percent
Musculoskeletal, including costochondritis	36
Gastrointestinal	19
Cardiac	16*
Stable angina	10.5
Unstable angina or myocardial infarction	1.5
Other cardiac	3.8
Psychiatric	8
Pulmonary	5
Other/unknown	16

* As high as 50% in older populations.

Adapted from Klinkman MS, Stevens D, Gorenflo DW. J Fam Pract 1994; 38:345.

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