Demographic characteristics of 188 medical schools in the USA*
| Characteristic | Number of institutions | Per cent of total |
| Overall | 188 | – |
| Degree type | ||
| Allopathic (MD) | 151 | 80.32% |
| Osteopathic (DO) | 37 | 19.68% |
| Geographic location | ||
| Protective | 73 | 38.83% |
| Mixed restrictions and protections | 18 | 9.57% |
| Restrictive | 97 | 51.59% |
| Institutional funding | ||
| Public | 100 | 53.19% |
| Private | 88 | 46.81% |
| Religious affiliation | ||
| Religious affiliation | 16 | 8.51% |
| No religious affiliation | 172 | 91.49% |
| Family planning division | ||
| Present | 52 | 27.66% |
| Absent | 136 | 72.34% |
*For medical schools with multiple campuses, all demographic categories were tabulated in accordance with Association of American Medical Colleges and American Association of Colleges of Osteopathic Medicine definitions of ‘institutions’ versus ‘branches/campuses’. Thus, when a single degree-granting institution operated campuses in multiple states, it was categorised based on its headquarters. This applied to the Mayo Clinic Alix School of Medicine, Edward Via College of Osteopathic Medicine, Kansas City University College of Osteopathic Medicine, Philadelphia College of Osteopathic Medicine, Touro University College of Osteopathic Medicine and Rocky Vista University College of Osteopathic Medicine.