Table 1.
Descriptive and demographic characteristics of the study population according to gender.
| Total | Male | Female | ||||
|---|---|---|---|---|---|---|
| N | % | N | % | N | % | |
| Thyroid-stimulating hormone level at birth (mU/L) | ||||||
| 0.45–1 | 47 | 15.2 | 26 | 8.4 | 21 | 6.8 |
| 2 | 35 | 11.3 | 21 | 6.8 | 14 | 4.5 |
| 3 | 41 | 13.2 | 23 | 7.4 | 18 | 5.8 |
| 4 | 40 | 12.9 | 20 | 6.5 | 20 | 6.5 |
| 5 | 34 | 11.0 | 19 | 6.1 | 15 | 4.8 |
| 6 | 39 | 12.6 | 20 | 6.5 | 19 | 6.1 |
| 7 | 35 | 11.3 | 21 | 6.8 | 14 | 4.5 |
| 8 | 14 | 4.5 | 10 | 3.2 | 4 | 1.3 |
| 9 | 14 | 4.5 | 6 | 1.9 | 8 | 2.6 |
| 10–15 | 11 | 3.6 | 7 | 2.3 | 4 | 1.3 |
| Age at examination | ||||||
| 4 years | 234 | 75.5 | 130 | 42.0 | 104 | 33.5 |
| 5 years | 76 | 24.5 | 43 | 13.9 | 33 | 10.6 |
| Children ethnicity | ||||||
| Europe (Caucasian) | 248 | 84.6 | 139 | 47.4 | 109 | 37.2 |
| Asia | 3 | 1.0 | 2 | 0.7 | 1 | 0.3 |
| Sub-Saharan Africa | 15 | 5.1 | 7 | 2.4 | 8 | 2.7 |
| North Africa | 27 | 9.2 | 16 | 5.5 | 11 | 3.8 |
PsychoTSH study (N = 310), Belgium, 2008–2014.
N, number of subjects.