Table 1.
Weighted characteristics of NHANES 2001–2006 participants 6–19 years of age.
| Characteristic | 6–19 years | 6–11 years | 12–19 years |
|---|---|---|---|
| n | 3,189 | 1,081 | 2,108 |
| 1-naphthol (ng/L) | 1604.55 (48.24) | 1370.51 (59.58) | 1804.98 (77.10) |
| 2-naphthol (ng/L) | 2530.30 (81.94) | 2032.47 (74.13) | 2979.43 (131.06) |
| 2-fluorene (ng/L) | 249.89 (7.25) | 212.32 (6.92) | 282.95 (10.35) |
| 3-fluorene (ng/L) | 105.58 (3.45) | 89.35 (3.16) | 119.97 (4.90) |
| 1-phenanthrene (ng/L) | 135.48 (3.75) | 122.68 (3.82) | 145.95 (4.90) |
| 2-phenanthrene (ng/L) | 50.10 (1.55) | 42.74 (1.42) | 56.49 (2.35) |
| 3-phenanthrene (ng/L) | 106.54 (3.46) | 101.92 (4.00) | 110.15 (4.17) |
| 1-pyrene (ng/L) | 98.91 (3.36) | 95.58 (3.85) | 101.49 (4.16) |
| ∑PAHs (ng/L) | 5704.66 (167.69) | 4891.34 (189.24) | 6417.88 (262.67) |
| Age (years) | 11.81 (0.14) | 8.37 (0.07) | 15.23 (0.08) |
| BMI z-score | 0.77 (0.02) | 0.74 (0.04) | 0.79 (0.03) |
| C-reactive protein (mg/dL) | 0.05 (0.00) | 0.04 (0.00) | 0.05 (0.00) |
| Blood cotinine (ng/mL) | 0.16 (0.02) | 0.09 (0.01) | 0.24 (0.03) |
| BMI | 20.50 (0.13) | 17.92 (0.14) | 22.64 (0.16) |
| Urinary creatinine (mg/dL) | 113.72 (2.46) | 91.73 (2.07) | 133.51 (3.11) |
| Sex | |||
| Male | 51.34 ± 1.25 | 51.14 ± 2.13 | 51.49 ± 1.48 |
| Female | 48.66 ± 1.25 | 48.86 ± 2.13 | 48.51 ± 1.48 |
| Race/ethnicity | |||
| Non-Hispanic white | 62.18 ± 2.28 | 60.06 ± 2.71 | 64.74 ± 2.53 |
| Non-Hispanic black | 14.71 ± 1.48 | 15.00 ± 1.68 | 14.49 ± 1.52 |
| Mexican American | 11.79 ± 1.19 | 13.21 ± 1.30 | 10.75 ± 1.31 |
| Other Hispanic | 5.22 ± 0.81 | 4.59 ± 1.27 | 5.68 ± 0.97 |
| Other | 6.11 ± 0.75 | 7.14 ± 1.32 | 5.34 ± 0.82 |
| Weight (n) | |||
| Obese | 608 (15.53 ± 0.98) | 204 (14.17 ± 1.44) | 404 (16.54 ± 1.14) |
| Overweight | 510 (16.69 ± 0.89) | 169 (16.60 ± 1.43) | 341 (16.76 ± 1.53) |
| Normal and underweight | 2,071 (67.78 ± 1.23) | 708 (69.23 ± 1.99) | 1,363 (66.70 ± 1.66) |
| Poverty income ratio (PIR) | |||
| PIR ≤ 1 | 22.22 ± 1.43 | 22.55 ± 1.76 | 21.96 ± 1.87 |
| PIR > 1 | 77.78 ± 1.43 | 77.45 ± 1.76 | 78.04 ± 1.87 |
| TV and video games use | |||
| ≤ 2 hr | 48.61 ± 1.63 | 52.46 ± 2.38 | 45.70 ± 1.89 |
| > 2 hr | 51.39 ± 1.63 | 47.54 ± 2.38 | 54.30 ± 1.89 |
| Caloric intake | |||
| Normal intake | 53.95 ± 1.20 | 50.10 ± 1.91 | 56.78 ± 1.75 |
| Excessive intake | 46.05 ± 1.20 | 49.90 ± 1.91 | 43.22 ± 1.75 |
| C-reactive protein | |||
| Tertile 1, ≤ 0.01 mg/dL | 28.76 ± 1.07 | 34.68 ± 1.89 | 24.69 ± 1.56 |
| Tertile 2, > 0.01–0.07 mg/dL | 38.26 ± 1.10 | 35.91 ± 2.03 | 39.88 ± 1.39 |
| Tertile 3, > 0.07 mg/dL | 32.98 ± 1.00 | 29.41 ± 1.99 | 35.43 ± 1.53 |
| Values are geometric mean (SE) or percent ± SE. | |||