Table S1.
Statistics for comparison of Korean adoptees and Dutch control participants on six control variables
| Variable | Statistical test | Descriptive statistic | |||
| Adoptees | Dutch controls | ||||
| N (%) | Mean (SD) | N (%) | Mean (SD) | ||
| Age (y) | t(56) = −0.24, P = 0.13 | 29 | 32 (5) | 29 | 32 (7) |
| Education* | χ2(3) = 2.21, P = 0.53 | ||||
| VBO | 2 (7) | — | 2 (7) | — | |
| MAVO | 8 (28) | — | 7 (24) | — | |
| HAVO | 9 (31) | — | 5 (17) | — | |
| VWO | 10 (35) | — | 15 (52) | — | |
| Visit | χ2(1) = 0.07, P = 0.79 | ||||
| Yes | 16 (55) | — | 15 (52) | — | |
| No | 13 (45) | — | 14 (48) | — | |
| Visit ratio | t(56) = 0.43, P = 0.67 | 29 | 0.01 (0.02) | 29 | 0.01 (0.02) |
| Language | t(56) = 0.88, P = 0.38 | 29 | 2.8 (1.1) | 29 | 2.6 (1.0) |
| Sex | χ2(1) = 1.87, P = 0.17 | ||||
| Female | 21 (72) | — | 16 (55) | — | |
| Male | 8 (28) | — | 13 (45) | — | |
*
From lowest to highest level in the Dutch high school system.