Table 1.
Description of 1747 participants included in the present study.
| HS-CRP | All | Q1 | Q2 | Q3 | Q4 | P-value |
|---|---|---|---|---|---|---|
| Age (years) | 15.6 ± 2.4 | 15.0 ± 2.2 | 15.7 ± 2.4 | 16.0 ± 2.5 | 16.4 ± 2.6 | < 0.0001 |
| Gender (%) | ||||||
| Male | 52.9 | 58.0 | 55.9 | 54.1 | 43.8 | 0.0001 |
| Female | 47.1 | 42.0 | 44.1 | 45.9 | 56.2 | |
| Race (%) | ||||||
| White | 29.4 | 54.5 | 54.3 | 53.3 | 50.2 | 0.2095 |
| Black | 19.5 | 13.4 | 12.5 | 10.2 | 11.3 | |
| Mexican American | 22.3 | 12.8 | 14.7 | 18.6 | 19.9 | |
| Other | 28.8 | 19.3 | 18.6 | 18.0 | 18.6 | |
| BMI (kg/m2) | 24.3 ± 6.0 | 20.5 ± 3.3 | 22.4 ± 4.0 | 24.5 ± 5.0 | 28.4 ± 7.2 | < 0.0001 |
| Income poverty ratio | 2.3 ± 1.5 | 2.8 ± 1.5 | 2.6 ± 1.6 | 2.5 ± 1.6 | 2.5 ± 1.6 | 0.0022 |
| Education level (%) | ||||||
| Less than 9th | 40.7 | 52.9 | 38.2 | 35.8 | 29.7 | < 0.0001 |
| 9th–11th | 54.1 | 42.9 | 55.2 | 53.4 | 56.5 | |
| Other | 5.2 | 4.2 | 6.5 | 10.8 | 13.8 | |
| Alkaline phosphatase (U/L) | 138.0 ± 96.3 | 164.2 ± 116.1 | 143.2 ± 99.5 | 130.4 ± 85.0 | 115.2 ± 78.4 | < 0.0001 |
| Cholesterol (mg/dL) | 4.1 ± 0.76 | 4.0 ± 0.7 | 4.0 ± 0.7 | 4.2 ± 0.8 | 4.2 ± 0.8 | < 0.0001 |
| Calcium (mg/dL) | 2.4 ± 0.1 | 2.4 ± 0.1 | 2.4 ± 0.1 | 2.4 ± 0.1 | 2.4 ± 0.1 | < 0.0001 |
| Phosphorus (mg/dL) | 1.4 ± 0.2 | 1.4 ± 0.2 | 1.4 ± 0.2 | 1.3 ± 0.2 | 1.3 ± 0.2 | < 0.0001 |
| Globulin (g/L) | 28.6 ± 3.8 | 25.9 ± 3.5 | 27.9 ± 3.4 | 28.7 ± 3.5 | 29.6 ± 3.7 | < 0.0001 |
| Total protein (g/L) | 73.0 ± 4.0 | 71.8 ± 4.0 | 72.8 ± 4.0 | 72.7 ± 4.1 | 72.7 ± 4.1 | 0.0006 |
| Total BMD (g/cm2) | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.0 ± 0.1 | 1.1 ± 0.1 | < 0.0001 |
Mean ± SD for continuous variables: P value was calculated by one-way ANOVA (normal distribution) and Kruskal–Wallis H (skewed distribution) test % for categorical variables: P value was calculated by chi-square test.