Selection Bias Selection bias occurs when the selection of participants in one group results in a different outcome than the selection for the other group
1 As of 2015, there are more than 96,000 osteopathic medical physicians in the United States.  By 2020, the number of osteopathic medical physicians will be over 100,000, say expert predictions, according to the American Medical Association.
Six of the colleges are publicly controlled, 27 are private institutions. In the 2016-17 academic year, colleges are educating more than 27,000 future physiciansâmore than 20 percent of U.S. medical students.