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Table 5 Dietary and non-dietary correlates of whole blood mercury a in a participant sample (n = 3972) from the KNHANES (2008–2009) b

From: Population correlates of circulating mercury levels in Korean adults: the Korea National Health and Nutrition Examination Survey IV

  % difference in blood mercury p-value
Age (years)   
20-29 Reference  
30-39 6.0 <0.001
40-49 11.1 <0.001
50-59 12.9 <0.001
≥60 5.6 <0.001
Men 9.8 <0.001
BMI (kg/m2) 1.0 <0.001
White fish intake level (g/day)   
Low tertile (0) Reference  
Medium tertile (0 < - ≤ 40) 2.7 0.02
High tertile (>40) 3.9 <0.001
Oily/fatty fish intake level (g/day)   
Low tertile (0) Reference  
Medium tertile (0 < - ≤ 40) 1.6 0.05
High tertile (>40) 2.6 0.03
Total shellfish intake level (g/day)   
Low tertile (0) Reference  
Medium tertile (0 < - ≤ 20) -1.4 0.1
High tertile (>20) 3.2 <0.001
MET-h/week   
<20 Reference  
20-39 2.6 0.01
≥40 0.8 0.3
Smoking status   
Never Reference  
Former 0.9 0.5
Current 1.7 0.1
Alcohol intake   
Never Reference  
≤1/mo 1.7 0.1
≤1/week 4.7 <0.001
2-3/week 9.4 <0.001
4+/week 9.7 <0.001
Income   
Low Reference  
Mid low 3.0 0.004
Mid high 4.2 <0.001
High 8.1 <0.001
Education   
Middle school graduation or less Reference  
High school graduation 0.4 0.7
College or more 3.7 0.003
Residence area   
Midwest Reference  
North 5.5 <0.001
Southwest 8.7 <0.001
Mideast 16.5 <0.001
Southeast and an island 17.5 <0.001
  1. aBlood mercury was logarithmically transformed as the dependent variable for the purpose of the multiple linear regression analysis. Beta-coefficient is approximately % difference in blood mercury (ln (μg/L)) from the reference category or per unit of continuous BMI).
  2. bMultivariable-adjusted findings including each of the variables in the Table.