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Table 2 Total blood mercury concentrations depending on general characteristics

From: The associations between blood mercury levels and shark meat intake among workers in Gyeongsangbuk-do

Characteristics Total Shark meat consumption
   Shark consumption Non-consumption
Total 4.11 (3.94–4.29) 4.58 (4.31–4.87)a 3.68 (3.47–3.92)a
Age (years)
  ≤ 29 3.43 (3.06–3.85) 3.35 (2.78–4.04) 3.32 (2.90–3.80)
 30–39 4.12 (3.88–4.38) 5.01 (4.57–5.50) 3.44 (3.18–3.72)
 40–49 4.35 (4.03–4.70) 5.21 (4.72–5.77) 3.47 (3.10–3.88)
 50≤ 4.39 (3.82–5.06) 5.68 (4.68–6.90) 3.34 (2.75–4.05)
p-valueb 0.006 < 0.001 0.953
Sex
 Men 4.23 (4.05–4.43) 5.12 (4.80–5.46) 3.50 (3.30–3.71)
 Women 3.28 (2.90–3.72) 3.68 (3.06–4.42) 2.87 (2.44–3.37)
p-valueb < 0.001 0.001 0.022
Smoking
 Nonsmokers 3.68 (3.42–3.97) 4.25 (3.82–4.72) 3.19 (2.88–3.52)
 Ex-smokers 4.50 (4.10–4.94) 5.57 (4.90–6.32) 3.60 (3.16–4.10)
 smokers 4.26 (4.01–4.53) 5.19 (4.74–5.68) 3.50 (3.24–3.79)
p-valueb 0.001 0.002 0.237
Alcohol
 Nondrinkers 3.79 (3.52–4.08) 4.44 (3.97–4.96) 3.23 (2.94–3.55)
 Drinkers 4.28 (4.06–4.50) 5.17 (4.80–5.56) 3.52 (3.29–3.77)
p-valueb 0.008 0.027 0.151
Residential area
 Urban 3.53 (3.35–3.72) 4.32 (3.96–4.72) 3.13 (2.95–3.32)
 Rural 5.64 (5.23–6.07) 5.62 (5.16–6.13) 5.70 (4.93–6.59)
p-valueb < 0.001 < 0.001 < 0.001
  1. Values are adjusted for age and residential area, and expressed as geometric mean (95% confidential interval), unit: μg/L
  2. aSignificant difference was observed between two groups, p-value: < 0.001
  3. bCalculated by ANCOVA