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Characteristics of the children whose mothers completed the targeted survey.
| Variable | N | % |
|---|---|---|
| All | 1154 | |
| Sex | ||
| Boys | 647 | 56.1 |
| Girls | 507 | 43.9 |
| Age/Grade | ||
| 1–3 years | 95 | 8.2 |
| 4–6 years | 157 | 13.6 |
| ES (1st–3rd) | 193 | 16.7 |
| ES (4th–6th) | 199 | 17.2 |
| JHS | 262 | 22.7 |
| HS | 248 | 21.5 |
| Residential area | ||
| Hokkaido | 41 | 3.6 |
| Tohoku | 88 | 7.6 |
| Kanto | 440 | 38.1 |
| Chubu | 202 | 17.5 |
| Kinki | 199 | 17.2 |
| Chugoku | 55 | 4.8 |
| Shikoku | 26 | 2.3 |
| Kyusyu/Okinawa | 103 | 8.9 |
