Table 2 Association of urinary mercury level with current allergic symptoms.

From: Association between environmental mercury exposure and allergic disorders in Korean children: Korean National Environmental Health Survey (KoNEHS) cycles 3–4 (2015–2020)

Allergic symptoms

Crude model

Model 1a

Model 2b

Model 3c

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

Cycle 3

 Atopic dermatitis

1.31 (0.99, 1.73)

1.36 (1.02, 1.81)

1.38 (1.02, 1.87)

1.38 (1.01, 1.89)

 Asthma

1.41 (0.93, 2.13)

1.41 (0.57, 3.52)

1.48 (0.64, 3.44)

1.42 (0.60, 3.35)

 Allergic rhinitis

0.94 (0.71, 1.23)

0.75 (0.54, 1.05)

0.77 (0.54, 1.10)

0.75 (0.52, 1.07)

 Multimorbidity1

1.50 (1.09, 2.06)

1.34 (0.90, 1.99)

1.39 (0.92, 2.09)

1.38 (0.90, 2.13)

Cycle 4

 Atopic dermatitis

1.32 (0.78, 2.24)

1.21 (0.64, 2.29)

1.21 (0.64, 2.30)

1.20 (0.61, 2.37)

 Asthma

0.40 (0.14, 1.13)

1.01 (0.13, 7.85)

1.44 (0.19, 11.13)

2.87 (0.49, 16.80)

 Allergic rhinitis

1.20 (0.90, 1.60)

1.45 (1.00, 2.11)

1.45 (1.00, 2.10)

1.46 (1.01, 2.10)

 Multimorbidity1

1.52 (0.87, 2.66)

1.61 (0.84, 3.10)

1.61 (0.84, 3.10)

1.74 (0.85, 3.52)

  1. CI confidence interval, OR odds ratio.
  2. 1Multimorbidity was defined as the presence of two or more symptoms, and the statistics were calculated by comparing this group and the group with no symptoms.
  3. Model 1 was adjusted for urinary creatinine level.
  4. Model 2 was adjusted for all covariates in Model 1 and further adjusted for sex and age.
  5. Model 3 was adjusted for all covariates in Model 2 and further adjusted for household income, parental education, BMI, and urinary cotinine level.
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