Table 1.
Demographic characteristics and biomarker levels of the study population. Mean, standard deviation and interquartile range are reported for continuous variables. N and percent (%) of study population are reported for categorical variables. N=268.
| Variable | N (%) | Mean ± SD | IQR |
|---|---|---|---|
| Age (years) | 47.88 ± 18.24 | 30, 62 | |
| Males | 112 (42%) | - | - |
| White/Caucasian | 214 (80%) | - | - |
| Ever smokersa | 114 (43%) | - | - |
| Eat fish 3 or more times a weekb | 140 (53%) | - | - |
| Household income (USD yr−1) | |||
| < 25,000 | 45 (17%) | - | - |
| 25,000–70,000 | 79 (30%) | - | - |
| 70,000–110,000 | 68 (25%) | - | - |
| 110,000–200,000 | 57 (21%) | - | - |
| > 200,000 | 19 (7%) | - | - |
| Graduate college education | 181 (68%) | - | - |
| Body mass index | - | 25.97 ± 5.13 | 22.48, 28.50 |
| Hg (μg L−1) | - | 7.71 ± 8.12 | 2.46, 10.50 |
| Hg (nM) | - | 47.56 ± 42.44 | 12.26, 52.35 |
| Se (μg L−1) | - | 293.54 ± 101.99 | 206.85, 365.50 |
| Se (nM) | - | 3728.54 ± 1287.65 | 2619.68, 4628.93 |
| Se:Hg (nM ratio) | - | 277.95 ± 560.94 | 65.79, 277.95 |
| Omega-3 Index (%) | - | 6.34 ± 1.76 | 5.09, 7.24 |
| GSH (μM) | - | 1022.29 ± ± 186.50 | 904.87, 1120.39 |
| GSSG (μM) | - | 1.23 ± 1.03 | 0.60, 1.50 |
| GSH:GSSG | - | 1206.35 ± 671.46 | 679.13, 1610.01 |
| Eh (mV) | - | −679.69 ± 19.44 | −694.25, −668.45 |
a
N = 267.
b
N=265.