Table 1.
Sample demographics by group and country
| Group | Educational levela | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Age | Sex | Percentage per level | Number | |||||||
| Mean | S.D. | Percentage female | Level 1 | Level 2 | Level 3 | Level 4 | Level 5 | Level 6 | n | |
| Group | ||||||||||
| Controls | 33.9 | 10.4 | 49% | 2% | 20% | 17% | 29% | 25% | 7% | 1525 |
| Siblings | 34.1 | 9.4 | 54% | 3% | 17% | 18% | 26% | 24% | 12% | 1282 |
| Patients | 33.7 | 8.6 | 33% | 5% | 23% | 27% | 29% | 12% | 4% | 1261 |
| Country | ||||||||||
| Turkey | 33.5 | 9.9 | 48 | 2% | 21% | 16% | 32% | 26% | 3% | 2499 |
| Spain | 35.1 | 9.1 | 42 | 6% | 20% | 25% | 22% | 11% | 16% | 1415 |
| Serbia | 29.3 | 6.5 | 52 | 6% | 2% | 51% | 17% | 18% | 6% | 154 |
| Total | 33.9 | 9.6 | 46 | 3% | 20% | 21% | 28% | 21% | 7% | 4068 |
Note: s.d. = standard deviation, n = number of observations.
a
Educational level: Level 1 = compulsory education no qualifications, Level 2 = compulsory education with qualifications, Level 3 = first level of non-compulsory education, Level 4 = vocational education, Level 5 = university undergraduate, Level 6 = university postgraduate.