| Finland | Japan | Lithuania | Italy | Total | ||||||
| n | % | n | % | n | % | n | % | n | % | |
| Intervention group | 166 | 72 | 157 | 52 | 101 | 50 | 104 | 52 | 528 | 56 |
| Comparison group | 66 | 38 | 147 | 48 | 101 | 50 | 98 | 48 | 412 | 44 |
| Total | 232 | 100 | 304 | 100 | 202 | 100 | 202 | 100 | 940 | 100 |
| Male | 32 | 14 | 134 | 44 | 11 | 5 | 15 | 7 | 192 | 20 |
| Female | 200 | 86 | 163 | 54 | 191 | 95 | 185 | 92 | 739 | 79 |
| No information | 0 | 0 | 7 | 2 | 0 | 0 | 2 | 1 | 12 | 1 |
| Total | 232 | 100 | 304 | 100 | 202 | 100 | 202 | 100 | 940 | 100 |
| Class teachers | 94 | 41 | 165 | 55 | 18 | 9 | 76 | 38 | 353 | 38 |
| Subject teachers | 54 | 23 | 68 | 22 | 58 | 30 | 73 | 37 | 253 | 27 |
| Special teachers | 41 | 18 | 20 | 7 | 15 | 8 | 31 | 16 | 107 | 11 |
| Others | 43 | 18 | 51 | 16 | 111 | 53 | 22 | 9 | 227 | 24 |
| Total | 232 | 100 | 304 | 100 | 202 | 100 | 202 | 100 | 940 | 100 |