Table 1 Characteristics of Participating Girls According to BPA Level
From: Urinary bisphenol A and pubertal development in Chinese school-aged girls: a cross-sectional study
Characteristic | N | BPA level(%) | ||
|---|---|---|---|---|
<LOD | LOD-Mediana | >Median | ||
All | 655 | 39.7 | 30.2 | 30.1 |
Age (years) | ||||
9–10 | 162 | 43.8 | 29.0 | 27.2 |
11–12 | 160 | 36.3 | 28.1 | 35.6 |
13–14 | 124 | 37.9 | 39.5 | 22.6 |
15–16 | 137 | 29.9 | 33.6 | 36.5 |
17–18 | 72 | 59.7 | 15.3 | 25.0 |
School | ||||
Elementary | 171 | 43.3 | 28.1 | 28.7 |
Middle school | 286 | 37.1 | 33.6 | 29.4 |
High school | 198 | 40.4 | 27.3 | 32.3 |
Residence | ||||
Rural | 99 | 35.4 | 33.3 | 31.3 |
Urban | 490 | 40.4 | 29.4 | 30.2 |
Missing | 66 | 40.9 | 31.8 | 27.3 |
Household income | ||||
Middle and below | 479 | 39.0 | 29.7 | 31.3 |
Upper middle and highest | 174 | 41.4 | 31.6 | 27.0 |
Missing | 2 | 50.0 | 50.0 | 0.0 |
BMI | ||||
< 18.5 | 286 | 42.3 | 31.1 | 26.6 |
18.5–25 | 330 | 36.7 | 29.7 | 33.6 |
≥ 25 | 39 | 46.2 | 28.2 | 25.6 |
Sleep quality | ||||
Bad | 35 | 45.7 | 25.7 | 28.6 |
Normal | 194 | 40.7 | 31.4 | 27.8 |
Good | 392 | 38.5 | 30.6 | 30.9 |
Missing | 34 | 41.2 | 23.5 | 35.3 |
Sports activity | ||||
< 30 min/day | 426 | 39.4 | 31.7 | 28.9 |
≥30 min/day | 217 | 41.0 | 26.3 | 32.7 |
Missing | 12 | 25.0 | 50.0 | 25.0 |
Unbalanced diet | ||||
No | 349 | 41.3 | 30.1 | 28.6 |
Yes | 266 | 38.7 | 30.8 | 30.5 |
Missing | 40 | 32.5 | 27.5 | 40.0 |
Depression scores | ||||
< 10 | 272 | 36.8 | 29.4 | 33.8 |
≥ 10 | 305 | 40.3 | 33.1 | 26.6 |
Missing | 78 | 47.4 | 21.8 | 30.8 |
Junk food intake | ||||
< 5 days/week | 484 | 39.2 | 30.4 | 30.4 |
≥5 days/week | 165 | 40.6 | 29.1 | 30.3 |
Missing | 6 | 50.0 | 50.0 | 0.0 |
Vegetable intake | ||||
Not everyday | 187 | 34.8 | 32.6 | 32.6 |
Everyday | 464 | 41.4 | 29.3 | 29.3 |
Missing | 4 | 75.0 | 25.0 | 0.0 |
Fruit intake | ||||
Not everyday | 281 | 39.2 | 32.0 | 28.8 |
Everyday | 372 | 40.3 | 29.0 | 30.7 |
Missing | 2 | 0.0 | 0.0 | 100.0 |
Soy bean food intake | ||||
Not everyday | 483 | 41.0 | 29.6 | 29.4 |
Everyday | 172 | 36.0 | 32.0 | 32.0 |