Table 1.
Mean (standard deviation) values for children’s age at the beginning of the follow-up, mother’s education and all test scores. Scale for mother’s education 1–7: 1 = comprehensive school, 5 = lower university/bachelor’s degree, 7 = doctoral degree.
| All (N = 66, female N = 41) | |||
|---|---|---|---|
| Mean (SD) | Minimum | Maximum | |
| Age (months) | 61 (3.6) | 53 | 69 |
| Mother’s education | 4.8 (1.4) | 1 | 7 |
| Phoneme processing | |||
| Test 1 | 26.3 (2.7) | 20 | 33 |
| Test 2 | 28.1 (3.6) | 22 | 41 |
| Test 3 | 29.2 (4.4) | 21 | 44 |
| Test 4 | 33.0 (5.3) | 23 | 47 |
| Vocabulary | |||
| Test 1 | 12.1 (4.3) | 4 | 26 |
| Test 2 | 13.4 (4.9) | 5 | 25 |
| Test 3 | 15.2 (5.5) | 6 | 29 |
| Test 4 | 17.8 (4.9) | 8 | 28 |
| Perceptual reasoning index | |||
| Test 1 | 27.4 (8.4) | 15.0 | 49.5 |
| Test 2 | 30.0 (8.2) | 12.0 | 48.0 |
| Test 3 | 32.4 (7.6) | 16.5 | 49.5 |
| Test 4 | 34.6 (7.2) | 18.0 | 49.5 |
| Inhibition | |||
| Test 1 | 8.9 (2.7) | 4 | 15 |
| Test 2 | 9.1 (2.9) | 5 | 15 |
| Test 3 | 9.8 (3.0) | 4 | 16 |
| Test 4 | 10.0 (2.8) | 5 | 15 |