| Value | Category |
|---|---|
| 1 | tea/drink with sugar only |
| 2 | milk/milk tea with sugar |
| 3 | solid food only |
| 4 | tea/drink with solid food |
| 5 | tea/drink without sugar with solid sugar |
| 6 | porridge with solid food |
| 7 | porridge with sugar only |
| 8 | porridge with milk |
| 9 | porridge without sugar only |
| 10 | nothing |
| 11 | other |
| Sysmiss |