| Retention difficulty | | | | |
| Difficult | −3.60 | 2.24 | −1.32 | 1.30 |
| Don't know/not applicable | −4.33 | 3.01 | −2.66 | 1.86 |
| Minimal (reference) | | | | |
| Recruitment difficulty | | | | |
| Difficult | −1.64 | 1.81 | −0.10 | 1.02 |
| Minimal (reference) | | | | |
| Racial/ethnic communities targeted | | | | |
| Single community | 2.77 | 2.56 | 3.15‡ | 1.46 |
| Multiple | 4.85‡ | 2.23 | 3.43‡ | 1.28 |
| None (reference) | | | | |
| Number of special populations targeted for research participation | −0.27 | 0.83 | −0.42 | 0.49 |
| PBRN has a community advisory board | 2.30 | 2.16 | 1.14 | 1.22 |
| PBRN affiliated with a Clinical Translational Science Award | 6.49‡ | 1.91 | 2.78‡ | 1.22 |
| Planning scale§ | Not included | 0.47‡ | 0.11 |
| Capacity scale‖ | Not included | 0.16 | 0.09 |