Table S4.
Statistics for comparison between early-adopted subgroup and matched Dutch subgroup on six control variables and on the childhood-vocabulary test
| Variable | Statistical test | Descriptive statistic | |||
| Early-adopted subgroup | Matched Dutch subgroup | ||||
| N (%) | Mean (SD) | N (%) | Mean (SD) | ||
| Age (y) | t(26) = 1.31, P = 0.20 | 14 | 28.4 (4.3) | 14 | 31.1 (6.5) |
| Education* | χ2(3) = 2.89, P = 0.41 | ||||
| VBO | 0 | — | 1 (7) | — | |
| MAVO | 4 (29) | — | 2 (14) | — | |
| HAVO | 6 (43) | — | 4 (29) | — | |
| VWO | 4 (29) | — | 7 (50) | — | |
| Visit | χ2(1) = 1.29, P = 0.26 | ||||
| Yes | 9 (64) | — | 6 (43) | — | |
| No | 5 (36) | — | 8 (57) | — | |
| Visit ratio | t(26) = 0.00, P = 1.00 | 14 | 0.01 (0.02) | 14 | 0.01 (0.02) |
| Language | t(26) = 0.56, P = 0.58 | 14 | 2.9 (1.0) | 14 | 2.6 (1.0) |
| Sex | χ2(1) = 0.00, P = 1.00 | ||||
| Female | 13 (93) | — | 13 (93) | — | |
| Male | 1 (7) | — | 1 (7) | — | |
| Childhood-vocabulary | t(26) = 0.43, P = 0.68 | 14 | 0.50 (0.14) | 14 | 0.48 (0.13) |
*
From lowest to highest level in the Dutch high school system.