Table 1.
Demographic characteristics of participants in the Active Control group (per-protocol cohort for efficacy; N = 744)
| Characteristic | Participant features | |
|---|---|---|
| Age in months, mean ± SD | 14 ± 3 | |
| Gender, % female | 48 | |
| Ethnicity, n (%) | European | 737 (99) |
| Arabic or North African | 2 (<1) | |
| Other | 5 (1) | |
| Country, n (%) | Czech Republic | 171 (23) |
| Greece | 32 (4) | |
| Italy | 35 (5) | |
| Lithuania | 86 (12) | |
| Norway | 25 (3) | |
| Poland | 116 (16) | |
| Romania | 42 (6) | |
| Russian Federation | 130 (17) | |
| Slovakia | 68 (9) | |
| Sweden | 39 (5) | |
| Care type, n (%) | At least one sibling at home | 192 (26) |
| Attending a day care center | 187 (25) | |
| Attending a childminder | 57 (8) | |
| At least once a week contact | 680 (91) | |
N, number of participants included in the cohort; n (%), number of participants in the defined category and their percentage relative to the corresponding cohort size; SD, standard deviation.