A cross-sectional study of sensory-motor neuropsychological function among sewage plant and sewage net workers exposed to hydrogen sulphide when handling wastewater.

Blindfolded balance testing indicates a nonsignificant trend in the total study sample , of reduced balance in the highest versus lowest H 2 S total long-term exposure-index group (Sway area [mean {SD}, mm 2 : 702 [410] versus 581 [278]), and a significant association between total long-term H 2 S exposure and reduced balance among smokers (Sway area, mm 2 [β = 38.7, P = 0.039], mean sway, mm [β = 0.3, P = 0.015]).

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