| Country (n = 1198) | |
| Canada | 19 (1.6) |
| United States | 1179 (98.4) |
| Region (n = 1177) | |
| Northeast | 272 (23.1) |
| Midwest | 354 (30.1) |
| South | 302 (25.7) |
| West | 249 (21.2) |
| Gender (n = 1190) | |
| Male | 652 (54.8) |
| Female | 538 (45.2) |
| Ethnicity (n = 1191) | |
| Non-Hispanic white | 989 (83.0) |
| Non-Hispanic black | 42 (3.5) |
| Hispanic | 48 (4.0) |
| Asian | 84 (7.1) |
| Other | 28 (2.4) |
| Age (n = 1192) | |
| <40 | 240 (20.1) |
| 40–49 | 353 (29.6) |
| 50–59 | 440 (36.9) |
| ≥60 | 159 (13.3) |
| Half days each week seeing patients in clinic (n = 1197) | |
| <3 | 550 (45.9) |
| 3–6 | 576 (48.1) |
| ≥7 | 71 (5.9) |
Data are n (%).