Table 1.
Characteristics of AMA Masterfile Physicians and Survey Respondents
| AMA Masterfile, Northeastern states ( = 39,435) | Survey respondents ( = 1,126) | P value Masterfile vs. respondents | |
|---|---|---|---|
| (%) | (%) | ||
| Age, years | |||
| 30–44 | 31 | 33* | |
| 45–59 | 50 | 45 | 0.53 |
| 60–75 | 19 | 14 | |
| Gender | |||
| Male | 73 | 72 | 0.87 |
| Medical school | |||
| US medical graduate | 61 | 57 | 0.46 |
| Foreign medical graduate | 39 | 29 | |
| Specialty | |||
| General internal medicine | 58 | 49 | 0.99 |
| Cardiology | 13 | 12 | |
| Endocrinology | 3 | 3 | |
| Gastroenterology | 7 | 8 | |
| Hematology | 2 | 3 | |
| Infectious disease | 4 | 5 | |
| Nephrology | 4 | 5 | |
| Oncology | 3 | 3 | |
| Pulmonary/Critical care | 6 | 9 | |
| States | |||
| Connecticut | 7 | 7 | 0.99 |
| Massachusetts | 16 | 15 | |
| Maine | 2 | 2 | |
| New Hampshire | 2 | 2 | |
| New Jersey | 16 | 14 | |
| New York | 38 | 30 | |
| Pennsylvania | 17 | 17 | |
| Rhode Island | 2 | 2 | |
| Vermont | 1 | 1 | |
* Due to missing values, the percentages in each group do not always add up to 100%
AMA = American Medical Association