Overview of the FU data collection rounds
| Health questionnaire | Physical examination | Cardiac assessment | |
| Eligible, n | 305 | 156 | 242 |
| Participated, n | 107 | 48 | 60 |
| FU rate, % | 35.1 | 30.8 | 24.7 |
| Intervention group, n(%) | 43 (40.1) | 17 (33.3) | 24 (40.0) |
| Age of the children, years* | 4.2 (0.8) | 4.6 (1.0) | 6.5 (1.1) |
*Data are presented as mean (SD)
FU, follow-up