Table 2.
Comparison of prevalence and related factors among different grade and sex
| Grade level | Sex | ||||||
|---|---|---|---|---|---|---|---|
| Primary school students | Middle school students | High school students | P value | Boys | Girls | P value | |
| n | 395 | 427 | 479 | 345/26.52% | 956/73.48% | ||
| Prevalence(n/%) | 91/23.04% | 107/25.06% | 112/23.38% | > 0.05 | 182/29.12% | 128/18.93% | < 0.001 |
| Prevalence of mild fatty liver(n/%) | 60/15.19% | 38/8.9% | 41/8.56% | < 0.001 | 77/12.32% | 62/9.17% | 0.066 |
| Prevalence of moderate fatty liver(n/%) | 23/5.82% | 45/10.54% | 32/6.68% | 0.023 | 54/8.64% | 46/6.8% | 0.214 |
| Prevalence of severe fatty liver(n/%) | 8/2.03% | 24/5.62% | 39/8.14% | < 0.001 | 51/8.16% | 20/2.96% | < 0.001 |
| Age(years) | 9.57 ± 1.68 | 13.50 ± 0.97 | 16.23 ± 0.91 | < 0.001 | 13.29 ± 2.84 | 13.33 ± 3.11 | 0.823 |
| Height(cm) | 140.51 ± 13.37 | 163.89 ± 8.67 | 167.97 ± 8.36 | < 0.001 | 162.73 ± 16.42 | 154.19 ± 13.73 | < 0.001 |
| Weight(kg) | 38.26 ± 15.74 | 59.31 ± 16.55 | 65.27 ± 16.27 | < 0.001 | 60.15 ± 21.82 | 50.46 ± 16.45 | < 0.001 |
| BMI(kg/m2) | 18.73 ± 4.83 | 21.89 ± 4.96 | 23.03 ± 4.94 | < 0.001 | 22.05 ± 5.64 | 20.70 ± 4.73 | < 0.001 |
| Waist(cm) | 65.95 ± 13.13 | 71.47 ± 12.61 | 74.27 ± 12.19 | < 0.001 | 74.60 ± 13.98 | 67.33 ± 11.08 | < 0.001 |
| Hip(cm) | 80.23 ± 11.55 | 91.50 ± 9.87 | 96.84 ± 10.43 | < 0.001 | 92.01 ± 12.76 | 88.23 ± 12.23 | < 0.001 |
| WHR | 0.82 ± 0.08 | 0.78 ± 0.08 | 0.76 ± 0.07 | < 0.001 | 0.81 ± 0.08 | 0.76 ± 0.07 | < 0.001 |
| CAP(dB/m) | 214.58 ± 35.34 | 222.30 ± 40.52 | 223.31 ± 41.14 | 0.002 | 226.01 ± 41.81 | 215.07 ± 36.31 | < 0.001 |
| Liver stiffness(kPa) | 5.54 ± 2.48 | 6.13 ± 2.56 | 6.36 ± 1.70 | < 0.001 | 6.22 ± 2.43 | 5.87 ± 2.12 | 0.006 |