| Value | Category |
|---|---|
| 1 | Irreversible changes in development of the body happen during this period |
| 2 | Maximum brain development happens during this period |
| 3 | Important period for early detection of disabilities |
| 4 | Important period for how successful a child?s educational attainment is |
| 88 | Other (specify:) |
| 98 | Don?t know |
| Sysmiss |