TABLE 1.
Demographic variables of the SCT group and the control group
| All ages | 3‐ to 4‐year‐olds | 5‐ to 7‐year‐olds | |||||||
|---|---|---|---|---|---|---|---|---|---|
| SCT | Controls | p | SCT | Controls | p | SCT | Controls | p | |
| n = 72 | n = 70 | n = 41 | n = 44 | n = 31 | n = 26 | ||||
| Age in years—M (SD) | 4.83 (1.29) | 4.52 (0.99) | 0.120 | 3.85 (0.61) | 3.91 (0.58) | 0.935 | 6.12 (0.75) | 5.58 (0.37) | 0.005 |
| Gender | M = 45 | M = 31 | 0.030 | M = 28 | M = 20 | 0.034 | M = 17 | M = 11 | 0.346 |
| F = 27 | F = 39 | F = 13 | F = 24 | F = 14 | F = 15 | ||||
| Parental education level a median (range) | 6 (4–7) | 6 (2–7) | 0.586 | 6.5 (4–7) | 6 (2–7) | 0.461 | 6 (4–7) | 6 (2–7) | 0.965 |
| Karyotype | N/A | N/A | N/A | ||||||
| XXX | 27 | 13 | 14 | ||||||
| XXY | 30 | 20 | 10 | ||||||
| XYY | 15 | 8 | 7 | ||||||
| Recruitment strategy (n) | N/A | N/A | N/A | ||||||
| Information‐seeking parents | 31 | 17 | 14 | ||||||
| Prospective follow‐up | 23 | 13 | 10 | ||||||
| Clinically referred | 18 | 11 | 7 | ||||||
| Recruitment site (n) | |||||||||
| The Netherlands | 39 | 70 | 15 | 44 | 24 | 26 | |||
| Denver, USA | 33 | 26 | 7 | ||||||
Note: Significant values are indicated in bold.
Abbreviations: F, female; M, male; SCT, sex chromosome trisomies.
a
Data from two primary caregivers (1 SCT, 1 control) was missing due to non‐completion of questionnaires.