Relationship between statement issuance and institutional characteristics of 188 US medical schools*
| Institutional characteristic | Number of institutions | Number of statement issuers (n, %) | Number of non-issuers (n, %) | OR of issuing (p value) |
| Overall | 188 | 64 | 124 | — |
| Degree type | 12.19 (p=0.001) | |||
| Allopathic (MD) | 151 | 62 (41.06%) | 89 (58.94%) | |
| Osteopathic (DO) | 37 | 2 (5.41%) | 35 (94.59%) | |
| Geographic location | 3.35 (p<0.0001) | |||
| Protective | 73 | 37 (50.68%) | 36 (49.31%) | |
| Mixed restriction and protection | 18 | 8 (44.44%) | 10 (55.56%) | |
| Restrictive | 97 | 19 (19.59%) | 78 (80.41%) | |
| Institutional funding | 0.68 (p=0.21) | |||
| Public | 100 | 30 (30.00%) | 70 (70.00%) | |
| Private | 88 | 34 (38.64%) | 54 (61.36%) | |
| Religious affiliation | 0.62 (p<0.0001) | |||
| Religious affiliation | 16 | 4 (25.00%) | 12 (75.00%) | |
| No religious affiliation | 172 | 60 (34.88%) | 112 (65.11%) | |
| Family planning divisions | 4.60 (p<0.0001) | |||
| Present | 52 | 31 (59.61%) | 21 (40.39%) | |
| Absent | 136 | 33 (24.26%) | 103 (75.73%) | |
*OR compares protective states to restrictive states and excludes states with mixed restrictions and protections.