Table 3 Geometric mean inorganic arsenic concentrations by demographic and weight status subgroups
Covariate | N | Mean, μg/L | 95% CI for Mean | p-value* | |
|---|---|---|---|---|---|
Age | |||||
≤ 19 years | 2063 | 3.4 | 3.1 | 3.8 | p = 0.03 |
≥ 20 years | 6455 | 3.9 | 3.6 | 4.2 | |
Gender | |||||
Male | 3994 | 4.4 | 4.1 | 4.8 | p < 0.0001 |
Female | 4524 | 3.3 | 3.1 | 3.6 | |
Race/Ethnicity | |||||
Non-Hispanic White | 3579 | 3.3c | 3.0 | 3.6 | p < 0.0001 |
Non-Hispanic Black | 1828 | 5.0ab | 4.6 | 5.4 | |
Mexican-American | 1624 | 4.7a | 4.3 | 5.2 | |
Other Hispanic | 770 | 5.7b | 5.0 | 6.4 | |
Other or Mixed | 717 | 5.6ab | 4.7 | 6.6 | |
Weight Status [n (%)] | |||||
Normal or underweight (BMI <25.9 kg/m2) | 3319 | 3.7 | 3.4 | 4.0 | p = 0.47 |
Overweight (BMI 25.9–29.9 kg/m2) | 2480 | 3.9 | 3.5 | 4.3 | |
Obese (BMI ≥30 kg/m2) | 2719 | 3.9 | 3.5 | 4.3 | |
PIR Status | |||||
< 1.3 | 2607 | 3.7 | 3.5 | 4.0 | p = 0.09 |
1.3- < 3.5 | 2852 | 3.6 | 3.3 | 3.9 | |
≥ 3.5 | 2412 | 4.0 | 3.6 | 4.4 | |
Missing | 647 | 4.2 | 3.5 | 5.1 | |