Table 1.
The prevalence of dietary supplement use, medicine use, and concomitant use of dietary supplements and medicines in children in the preliminary survey (%).
| Age/Grade 1 | N | Dietary Supplements | Medicine | Concomitant Use | |||
|---|---|---|---|---|---|---|---|
| All | 55,038 | 7.6 | 22.1 | 3.2 | |||
| p for trend | p for trend | p for trend | |||||
| 1–3 years | 17,361 | 3.5 | <0.01 | 18.6 | <0.01 | 1.4 | <0.01 |
| 4–6 years | 9044 | 6.2 | 25.0 | 2.9 | |||
| ES (1st–3rd) | 8206 | 7.9 | 24.5 | 3.5 | |||
| ES (4th–6th) | 7333 | 8.8 | 24.0 | 3.6 | |||
| JHS | 7245 | 12.0 | 21.9 | 5.0 | |||
| HS | 5849 | 14.4 | 22.2 | 6.0 | |||
1 ES, elementary school; JHS, junior high school; and HS, high school. Tests for trend among age groups were performed using nptrend command (Stata, Light Stone, Tokyo, Japan).