BioMed Research International / 2012 / Article / Tab 2

Research Article

Methyl Mercury Exposure at Niigata, Japan: Results of Neurological Examinations of 103 Adults

Table 2

Characteristics of subjects by hair mercury content.

All

Mean age in years (1965) ± SD
Sex
 Men61 (59.2%)11 (45.8%)12 (50.0%)12 (57.1%)26 (76.5%)
 Women42 (40.8%)13 (54.2%)12 (50.0%)9 (42.9%)8 (23.5%)
Date symptoms began1964–19731964–19731964–19701964–19721964–1971
Mean age in years (±SD) that symptoms began
Mean age in years of assessment of neurologic signs ± SD
Mean hair mercury content ± SD (μg/g)
Hair mercury content (μg/g) (min-max)4.2–570.04.2–19.520.5–46.656.0–100.0104.0–570.0
Analysis method of hair mercury (1965)
 Dithizone72 (69.9%)10 (41.7%)18 (75.0%)13 (61.9%)31 (91.2%)
 Neutron activation26 (25.2%)13 (54.2%)6 (25.0%)5 (23.8%)2 (5.9%)
 Atomic absorption5 (4.9%)1 (4.1%)0 (0%)3 (14.3%)1 (2.9%)

SD: standard deviation.

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