|  | Trial participation |  | Location of the GDP | |||||
---|---|---|---|---|---|---|---|---|---|
ZIP code region | Study proposal (N = 3194) | Refusal | Open decision | Promise | Lecture participation (N = 144) | Urban | Outskirts of town | Rural | |
 |  | [%] | [%] | [%] | N | [%] | [%] | [%] | [%] |
0 | 396 | 14.6 | 77.5 | 7.8 | 15 | 7,8 | 53.3 | 40.0 | 6.7 |
2 | 70 | 62.9 | 12.9 | 25.7 | 10 | 14.3 | 60.0 | 30.0 | 10.0 |
3 | 294 | 56.5 | 32.0 | 11.9 | 27 | 9.2 | 77.8 | 14.8 | 3.7 |
4 | 471 | 80.9 | 11.9 | 7.6 | 24 | 5.5 | 58.3 | 33.3 | 8.3 |
5 | 738 | 42.8 | 56.2 | 7.0 | 42 | 5.8 | 54.8 | 28.6 | 11.9 |
6 | 588 | 31.3 | 71.3 | 3.6 | 8 | 1.7 | 87.5 | 12.5 | 0 |
7/8a | 637 | 86.0 | 0.3 | 6.9 | 18 | 5.2 | 61.1 | 22.2 | 16.7 |
 | MEAN [%] | 53.6 | 37.4 | 10.1 |  | 7.1 | 64.7 | 25.9 | 8.2 |