Characteristics of study practices.
| Practice number | Location | List size | Number of partners |
|---|---|---|---|
| 1 | Rural | <5000 | 3–5 |
| 2 | Rural | <5000 | 1 or 2 |
| 3 | Suburban | >10 000 | >5 |
| 4 | Urban | >10 000 | >5 |
| 5 | Urban | <5000 | 1 or 2 |
| 6 | Urban | >10 000 | >5 |
| 7 | Suburban | 5000–10 000 | 3–5 |
| 8 | Suburban | >10 000 | >5 |
| 9 | Urban | >10 000 | >5 |
| 10 | Urban | >10 000 | >5 |
| 11 | Suburban | 5000–10 000 | 3–5 |
| 12 | Rural | <5000 | 1 or 2 |
| 13 | Rural | <5000 | 1 or 2 |
| 14 | Urban | >10 000 | >5 |
| 15 | Urban | <5000 | 3–5 |
| 16 | Rural | 5000–10 000 | 3–5 |
| 17 | Urban | 5000–10 000 | 3–5 |
| 18 | Rural | 5000–10 000 | 3–5 |
| 19 | Urban | 5000–10 000 | 3–5 |