Provider surveys compile data from physicians, hospitals and other health care providers. These surveys typically obtain information from case records selected:
As a sample of all of a set of medical transactions
As a sample of patients or
As patients with a particular condition--for example
those who have used illicit substances,
those with a particular disease [AIDS, cancer,] or
those who have received a particular procedure
Next, consider the impact that using provider records has on the quality of the results reported. Go Here.