Table 1.
Characteristics1 of the participants from the DONALD study
| All (n = 242) | CFT-1 (n = 44) | CFT-20R (n = 198) | Missing | |
|---|---|---|---|---|
| Male sex, n (%) | 117 (48%) | 24 (55%) | 93 (47%) | 0 |
| Pregnancy duration (week) | 40 (± 1.3) | 39 (± 1.3) | 40 (± 1.4) | 0 |
| Birthweight (g) | 3500 (± 420) | 3500 (± 420) | 3500 (± 420) | 0 |
| Exclusive breastfeeding2 (weeks) | 19 (± 9.4) | 20 (± 9.5) | 18 (± 9.4) | 3 |
| Exclusive breastfeeding3, n (%) | 211 (87%) | 38 (86%) | 173 (87%) | 3 |
| Age at the CFT assessment (years) | 17 (± 7.8) | 7.2 (± 0.84) | 19 (± 7.1) | 0 |
| FI score (points) | 110 (± 14) | 110 (± 12) | 110 (± 15) | 0 |
| Time between UIE and CFT (years) | 3.5 (± 4.0) | 0.71 (± 1.2) | 4.1 (± 4.2) | 0 |
| UIE (μg/d) | 94 (± 52) | 59 (± 27) | 100 (± 53) | 0 |
| UIE > EAR, n (%) | 160 (66%) | 18 (41%) | 142 (72%) | 0 |
| Paternal higher education, n (%) | 177 (73%) | 39 (89%) | 138 (70%) | 3 |
| Maternal higher education, n (%) | 183 (76%) | 43 (98%) | 140 (71%) | 3 |
1Data are shown as mean (± SD) or n (%)
2Exclusive breastfeeding duration (weeks) was defined as the number of weeks of both exclusive (breast milk only with no other food or drink) and predominant (breast milk in combination with water or water-based drinks) breastfeeding
3Participants which were fully breastfeeding (i.e. ≥ 3 weeks)
Abbreviations: CFT culture fair intelligence test; EAR recommended daily allowance; SD standard deviation; UIE urinary iodine excretion