TABLE 1.
Comparison of samples in a study of risk for psychopathology among the children of parents with alcohol use disorder with the general Swedish populationa
| Offspring | DS | |||||||
|---|---|---|---|---|---|---|---|---|
| Measure | Population Sample (N=2,071,848) | Study Sample (N=1,244,516) | Population Sample (N=3,228,061) | Study Sample (N=l,445,225) | ||||
| Mean | SD | Mean | SD | Mean | SD | Mean | SD | |
| Year of birth | 1980.0 | 6.3 | 1979.9 | 6.1 | 1949.4 | 8.6 | 1949.9 | 8.1 |
| Age at follow-up (years) | 37.4 | 7.0 | 37.7 | 6.8 | 67.6 | 8.8 | 67.6 | 7.9 |
| N | % | N | % | N | % | N | % | |
| Male | 1,063,922 | 51.4 | 645,815 | 51.9 | 1,633,359 | 50.6 | 722,597 | 50.0 |
| Highest level of education | ||||||||
| Presecondary education | 146,346 | 7.1 | 57,077 | 4.6 | 792,482 | 24.5 | 320,358 | 22.2 |
| Secondary education | 887,261 | 42.8 | 497,345 | 40.0 | 1,405,001 | 43.5 | 654,080 | 45.3 |
| Postsecondary education | 1,023,455 | 49.4 | 683,633 | 54.9 | 1,019,391 | 31.6 | 470,627 | 32.6 |
| Not available | 14,567 | 0.7 | 6,461 | 0.5 | 5,624 | 0.2 | 160 | 0.0 |
| Born in Sweden | 2,071,848 | 100 | 1,244,516 | 100 | 2,967,551 | 91.9 | 1,322,247 | 91.5 |
| Birth region among those born in Swedenb | ||||||||
| Stockholm County | 396,314 | 19.1 | 209,950 | 16.9 | 436,527 | 14.7 | 167,590 | 12.7 |
| Northern Sweden | 289,603 | 14.0 | 178,088 | 14.3 | 557,584 | 18.8 | 245,056 | 18.5 |
| Central Sweden | 389,959 | 18.8 | 230,670 | 18.5 | 566,939 | 19.1 | 246,574 | 18.6 |
| Southern Sweden | 995,667 | 48.1 | 625,804 | 50.3 | 1,403,137 | 47.3 | 662,968 | 50.1 |
The offspring study sample was compared with the sample of all individuals born in Sweden between 1970 and 1990 who were followed up until at least age 15. To produce a comparative sample from the general Swedish population for the parents in the study sample, we included individuals (parents and nonparents) born between the years 1935 and 1964, which covered 95% of the birth years in the parental study sample. To ensure data availability, the individuals had to have been followed up until at least 1995 and did not immigrate to Sweden after 1979.
Definition of birth regions: northern Sweden: Norrbotten, Västerbotten, Jämtland, Västernorrland, and Gävleborg counties; central Sweden: Dalarna, Västmanland, Örebro, Värmland, Uppsala, and Södermanland counties; southern Sweden: Östergötland, Jönköping, Kronoberg, Halland, Västra Götaland, Kalmar, Gotland, Blekinge, and Skåne counties.