Table S3.
Observable traits of Catalist matches and survey sample
| Statistics | Catalist matched (4) | Catalist matched, Democrats and Republicans only (5) | Survey sample, unweighted (6) |
| Percent Female | 36.9 | 36.4 | 39.2 |
| Specialty | |||
| Percent internal medicine | 51.5 | 48.6 | 54.3 |
| Percent family medicine | 44.0 | 46.7 | 42.2 |
| Percent adult medicine | 1.2 | 1.2 | 0.7 |
| Percent general practice | 3.3 | 3.4 | 2.8 |
| Median physicians at address | 2 | 2 | 9 |
| Age | 50.9 | 52.0 | 49.5 |
| Percent Democratic | 53.3 | 53.3 | 55.3 |
| Block group median income, $ | 83,052 | 82,152 | 78,114 |
| Percent in mixed-partisan practices | 14.1 | 16.0 | 55.4 |
| N | 20,296 | 13,678 | 1,529 |