Table 1 Age stratification and the distribution of subjects
| Age | Number of subjects according to age stratification | Number of subjects included for the final analysis |
|---|---|---|
| 0—6 months | 750 | 752 |
| 6.1—12 months | 190 | 190 |
| 12.1—24 months | 185 | 190 |
| 24.1—36 months | 185 | 189 |
| 36.1—48 months | 190 | 190 |
| Total subjects | 1500 | 1511 |