eTable 3. Sociodemographic data.
| Total (N = 2524) | Men (n = 1145) | Women (n = 1379) | ||||
| n | % | n | % | n | % | |
| Highest school leaving certificate | ||||||
| General secondary school (year 9 ‧lower secondary school certificate) not completed | 59 | 2 | 26 | 2 | 33 | 2 |
| Year 9 lower secondary school certificate | 763 | 30 | 351 | 31 | 412 | 30 |
| Intermediate secondary school completed | 815 | 32 | 340 | 30 | 475 | 34 |
| Polytechnic secondary school completed (10th year) | 189 | 7 | 87 | 8 | 102 | 7 |
| Technical school “Abitur“ (A level equivalent) (not acknowledged) |
83 | 3 | 40 | 3 | 43 | 3 |
| University entrance certification (“Abitur”), but university degree not completed | 285 | 11 | 127 | 11 | 158 | 11 |
| Degree from university or technical university | 253 | 10 | 130 | 11 | 123 | 9 |
| Students at a general school | 75 | 3 | 43 | 4 | 32 | 2 |
| Special needs school | 2 | 0 | 1 | 0 | 1 | 0 |
| Nationality | ||||||
| German | 2420 | 96 | 1082 | 94 | 1338 | 97 |
| Non-German | 104 | 4 | 63 | 6 | 41 | 3 |
| Housing/domestic set-up | ||||||
| Cohabiting | 1317 | 52 | 635 | 56 | 682 | 50 |
| Not cohabiting | 1171 | 47 | 493 | 43 | 678 | 49 |
| N/A | 36 | 1 | 17 | 1 | 19 | 1 |
| Net household income | ||||||
| < €1250/month | 456 | 18 | 171 | 15 | 285 | 21 |
| €1250–2500/month | 1068 | 42 | 483 | 42 | 585 | 42 |
| > €2500/month | 913 | 36 | 462 | 40 | 451 | 33 |
| N/A | 87 | 3 | 29 | 3 | 58 | 4 |
N/A, no answer