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.
Primary care physician shortage. Primary care physician shortage statistics. There wonât be enough doctors to treat the millions of people newly insured under the new Healthcare Reform law.United States could face a shortage of as many as 150,000 doctors in the next 15 years.