| Denmark | Norway | Sweden | |
| Number of students N | 4508 | 2926 | 3464 |
| Average age, years (standard deviation) | 14.9 (0.39) | 14.7 (0.30) | 14.8 (0.35) |
| Average civic knowledge achievement PV1CIV (standard deviation) | 575 (98) | 541 (103) | 536 (100) |
| Students with high civic knowledge achievement (i.e., a PV1CIV score at 601 and above, one standard deviation away from the international average), % | 41.5 | 30.5 | 26.5 |
| Girls, % | 52.1 | 49.9 | 50.1 |
| Parents’ education attainments at the lower secondary level (ISCED 1, 2) % | 4.9 | 3.7 | 5.8 |
| Parents’ education attainment at the upper secondary level (ISCED 3) % | 21.1 | 20.4 | 20.8 |
| Parents’ education attainment at the post-secondary level or short tertiary level (ISCED 4, 5B), % | 51.4 | 24.5 | 22.1 |
| Parents’ education attainment at the tertiary level or higher (ISCED 5A or 6), % | 22.6 | 51.4 | 51.3 |