Table 1.
Characteristics of mother–infant dyads (n = 130).
| Characteristic | Categories | n (%) a |
|---|---|---|
| Maternal age, mean (SD) | 31.5 (4.6) | |
| Maternal educational level | <12 years | 6 (5) |
| 12 years | 17 (13) | |
| 1–4 years college/university | 52 (40) | |
| >4 years college/university | 55 (42) | |
| Maternal BMI, kg/m2 | <18.5 (Underweight) | 4 (3) |
| 18.5–24.9 (Normal weight) | 81 (62) | |
| 25–29.9 (Overweight) | 30 (23) | |
| >30 (Obese) | 15 (12) | |
| Maternal iodine knowledge score | Poor (0–5) | 10 (8) |
| Low (6–11) | 17 (13) | |
| Medium (12–19) | 69 (53) | |
| High (20–26) | 34 (26) | |
| Maternal use of iodine-containing supplement last 24-h | Yes | 30 (23) |
| Infant age in weeks, median (min–max) | 22 (1–5) | |
| Infant gender | Boy | 69 (53) |
| Breastfeeding status b | Weaned | 28 (22) |
| Partially | 46 (35) | |
| Exclusively | 56 (43) |
a Numbers are presented as n (%) if not indicated otherwise. b Exclusively breastfed infants were defined as infants who received breast milk (including milk expressed) only, and no other liquids, solid foods or water was given, except drops of vitamins or minerals.