Table S5.
Response bias
| Statistics | Survey sample (6) | Survey respondents (7) | P value |
| Percent Female | 39.2 | 42.9 | 0.14 |
| Specialty | |||
| Percent internal medicine | 54.3 | 56.5 | 0.39 |
| Percent family medicine | 42.2 | 41.5 | 0.78 |
| Percent adult medicine | 0.7 | 0.0 | 0.12 |
| Percent general practice | 2.8 | 2.0 | 0.34 |
| No. physicians at address | |||
| Median | 9 | 6 | |
| Age | 49.5 | 53.0 | <0.01 |
| Percent Democratic | 55.3 | 62.5 | <0.01 |
| Block group median income, $ | 78,114 | 79,565 | 0.42 |
| Percent in mixed-partisan practices | 55.4 | 50.2 | 0.04 |
| N | 1,529 | 301 |
Difference of mean P value is the difference between respondents and nonrespondents.