Table 3.
Demographic Characteristics | Creatinine Adjustment | Overall Geometric Mean Cd level | Nonsmokers | Smokers | P-valuea | ||
---|---|---|---|---|---|---|---|
Geometric Mean Cd level without SHS | Geometric Mean Cd level with Low SHS | Geometric Mean Cd level with High SHS | Geometric Mean Cd level | ||||
AGE(years) | |||||||
2:[6–12)b | Adjustedc | 0.09 (0.08,0.10) | 0.08 (0.07,0.10) | 0.09 (0.07,0.10) | 0.09 (0.08,0.11) | n/ad | |
Unadjustede | 0.08 (0.07,0.09) | 0.08 (0.06,0.09) | 0.08 (0.06,0.10) | 0.08 (0.07,0.10) | n/a | ||
3:[12–19) | Adjusted | 0.09 (0.08,0.09) | 0.09 (0.08,0.10) | 0.09 (0.08,0.10) | 0.08 (0.07,0.09) | 0.08 (0.07,0.10) | |
Unadjusted | 0.12 (0.11,0.13) | 0.11 (0.10,0.13) | 0.13 (0.11,0.15) | 0.12 (0.11,0.14) | 0.12 (0.09,0.15) | ||
4:[19–35) | Adjusted | 0.14 (0.13,0.15) | 0.14 (0.13,0.15) | 0.11 (0.09,0.13) | 0.13 (0.11,0.15) | 0.18(0.16,0.20)f | 0.0005 |
Unadjusted | 0.18 (0.17,0.20) | 0.16 (0.14,0.18) | 0.14 (0.10,0.17) | 0.19 (0.15,0.22) | 0.24(0.20,0.27)h | 0.0002 | |
5:[35–50) | Adjusted | 0.27 (0.25,0.29) | 0.21 (0.19,0.23) | 0.24 (0.20,0.27) | 0.22(0.18,0.26)h | 0.45(0.40,0.50)h | 0.0000 |
Unadjusted | 0.28 (0.25,0.30) | 0.21 (0.18,0.24) | 0.26 (0.22,0.29) | 0.22(0.17,0.27)h | 0.45(0.39,0.50)h | 0.0000 | |
6:[50–65) | Adjusted | 0.40 (0.37,0.43) | 0.33 (0.30,0.37) | 0.38 (0.31,0.45) | 0.36(0.30,0.42)h | 0.67(0.58,0.76)h | 0.0000 |
Unadjusted | 0.35 (0.32,0.39) | 0.28 (0.25,0.32) | 0.34 (0.27,0.41) | 0.30(0.19,0.41)h | 0.65(0.54,0.76)h | 0.0000 | |
7:[65+) | Adjusted | 0.46 (0.43,0.49) | 0.43 (0.39,0.46) | 0.40(0.36,0.43)g | 0.54(0.46,0.63)h | 1.04(0.90,1.18)h | 0.0000 |
Unadjusted | 0.36 (0.33,0.39) | 0.31 (0.28,0.35) | 0.35 (0.29,0.40) | 0.43(0.34,0.51)h | 0.90(0.72,1.08)h | 0.0000 | |
RACE/ETHNICITY | |||||||
Non-Hispanic White | Adjusted | 0.23 (0.21,0.24) | 0.22 (0.20,0.23) | 0.21(0.18,0.24)g | 0.15(0.14,0.17)h | 0.34(0.30,0.38)h | 0.0000 |
Unadjusted | 0.22 (0.20,0.23) | 0.20 (0.18,0.21) | 0.20(0.18,0.23)f | 0.16(0.14,0.18)h | 0.34(0.30,0.38)h | 0.0000 | |
Non-Hispanic Black | Adjusted | 0.20 (0.18,0.21)j | 0.19 (0.17,0.22) | 0.16 (0.14,0.18)i | 0.15 (0.13,0.17)h | 0.36 (0.30,0.42)h | 0.0000 |
Unadjusted | 0.29 (0.26,0.32)k | 0.27 (0.23,0.32)j | 0.23 (0.20,0.26) | 0.21 (0.18,0.24)h,j | 0.60 (0.50,0.70)h,k | 0.0000 | |
Mexican American | Adjusted | 0.18 (0.16,0.19)k | 0.17 (0.16,0.19)k | 0.16 (0.14,0.18)j | 0.15 (0.12,0.17)h | 0.28 (0.23,0.34)h | 0.0000 |
Unadjusted | 0.19 (0.18,0.21)i | 0.17 (0.16,0.19)i | 0.18 (0.16,0.21) | 0.16 (0.13,0.19)h | 0.36 (0.30,0.41)h | 0.0000 | |
GENDER | |||||||
Male | Adjusted | 0.18 (0.17,0.19) | 0.16 (0.15,0.17) | 0.16 (0.14,0.18) | 0.13 (0.12,0.15)h | 0.29 (0.25,0.32)h | 0.0000 |
Unadjusted | 0.22 (0.21,0.23) | 0.19 (0.18,0.21) | 0.20 (0.17,0.23) | 0.16 (0.13,0.18)h | 0.38 (0.33,0.43)h | 0.0000 | |
Female | Adjusted | 0.26 (0.25,0.28)k | 0.26 (0.24,0.27)k | 0.25 (0.22,0.28)h,k | 0.18 (0.16,0.20)h,k | 0.40 (0.35,0.45)h,k | 0.0000 |
Unadjusted | 0.23 (0.21,0.24) | 0.20 (0.19,0.22) | 0.21 (0.19,0.24) | 0.19 (0.16,0.21)h | 0.37 (0.32,0.42)h | 0.0000 | |
POVERTY INDEX | |||||||
Below poverty index | Adjusted | 0.20 (0.18,0.21) | 0.19 (0.17,0.22) | 0.17 (0.14,0.20) | 0.14 (0.12,0.16)h | 0.31 (0.27,0.36)h | 0.0000 |
Unadjusted | 0.23 (0.20,0.25) | 0.19 (0.16,0.22) | 0.21 (0.17,0.25) | 0.16 (0.14,0.18)h | 0.40 (0.33,0.47)h | 0.0000 | |
Above poverty index | Adjusted | 0.22 (0.21,0.23) | 0.21 (0.20,0.22) | 0.20 (0.18,0.22)g | 0.16 (0.14,0.17)h | 0.34 (0.30,0.38)h | 0.0000 |
Unadjusted | 0.22 (0.21,0.23) | 0.20 (0.18,0.21) | 0.20 (0.18,0.23) | 0.17 (0.15,0.19)h | 0.37 (0.32,0.42)h | 0.0000 |
A statistically significant difference in log transformed mean levels between the exposure groups (nonsmoker, nonsmokerlow, nonsmokerhigh, smoker) determined by linear regression.
For age categories, a square bracket indicates inclusion of the interval end point, and a parenthesis indicates exclusion.
Units are μg/g creatinine.
Not applicable.
Units are μg/L.
For statistical analysis of differences in mean urine metal levels the following t-tests comparisons were performed: nonsmokers and nonsmokerslow; nonsmokerslow and nonsmokershigh; nonsmokershigh and smokers; smokers and nonsmokers; and nonsmoker vs. nonsmokerhigh for children aged 6–11 years;
p-value less than 0.05;
p-value less than 0.01;
p-value less than 0.001. For statistical analysis of differences in mean urine cadmium levels across group comparisons, the following t-test comparisons were performed: non-Hispanic black versus non-Hispanic white, Mexican American versus non-Hispanic white, and female versus male;
p-value less than 0.05;
p-value less than 0.01;
p-value less than 0.001.