Interaction of occupational manganese exposure and alcohol drinking aggravates the increase of liver enzyme concentrations from a cross-sectional study in China

Table 1 Demographic characteristics of the manganese exposed workers healthy cohort (MEWHC)

^a Low-exposure group includes those workers in the non-production workplaces such as drivers or cookers, and air Mn concentration ranged in 0~0.02 mg/m³.
^b Intermediate-exposure group includes those workers in the auxiliary workshops such as weld workers or ingredient workers. The air Mn concentration ranged in 0.07~0.15 mg/m³ before 2007, and in 0.02~0.14 mg/m³ after 2007.
^c High-exposure group only includes smelting workers. The air Mn concentration ranged in 0.36~1.06 mg/m³ before 2007, and in 0.08~0.45 mg/m³ after 2007.

ISSN: 1476-069X