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Table 4 Regression coefficients β of adults hair mercury concentration stratified on the base of the WHO* "reference level" as a predictor of neurobehavioral test results in children.

From: Low level methylmercury exposure affects neuropsychological function in adults

Test βa 95% CI βb 95% CI
Fine Motor Speed -19.0 -31.0; -6.7 -17.7 -29.4; -6.3
Digit Symbol -7.82 -12.4; -3.2 -4.28 -7.9; -0.48
Errors of commission 9.0 3.1; 14.9 9.0 2.9; 15.1
  1. a – not adjusted; b – adjusted by age, gender and education level; * 6 μg/g (WHO reference level)