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Table 2 Degree of bivariate overlap in exposure to the various metals and welding fumes in INTEROCC, in glioma cases and controls combined, 2000-2004a

From: Lifetime occupational exposure to metals and welding fumes, and risk of glioma: a 7-country population-based case–control study

 

Cadmium

Chromium

Iron

Lead

Nickel

Welding fumes

n

130

537

772

546

659

570

Cadmium

-

7.1

6.6

10.4

7.4

2.6

Chromium

29.2

-

69.6

40.3

79.8

66.0

Iron

39.2

100

-

64.1

95.6

100

Lead

43.8

41.0

45.3

-

44.5

53.0

Nickel

37.7

98.0

81.6

53.7

-

82.8

Welding fumes

11.5

70.0

73.8

55.3

71.6

-

  1. aValues of cells in each column represent the proportion of participants with exposure to the agent in the column heading who were also exposed to the agent in the corresponding row. For welding fumes, exposures to other metals could come from welding activities, from other activities in the same job and/or from activities in other jobs