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Table 2 Exposure to chlorinated and aromatic hydrocarbons and lymphoma in total (n = 710 matched pairs)

From: Solvent exposure and malignant lymphoma: a population-based case-control study in Germany

 

Cases

Controls

Adj. ORa

95% CI

 

N

%

N

%

  

CHLORINATED HYDROCARBONS

      

Chlorinated hydrocarbons in total [ppm*yrs.]

      

   0 ppm*yrs.

567

79.9

563

79.3

1.0

-

   >0, <= 4.4 ppm*yrs.

53

7.5

74

10.4

0.7

0.5–1.0

   >4.4, <= 47.3 ppm*yrs.

54

7.6

59

8.3

0.9

0.6–1.3

   >47.3 ppm*yrs.

29

4.1

14

2.0

2.1

1.1–4.3

Trend test*

     

P = 0.03

Trichloroethene [ppm*yrs.]

      

   0 ppm*yrs.

610

85.9

602

84.4

1.0

-

   >0, <= 4.4 ppm*yrs.

40

5.6

55

7.7

0.7

0.4–1.1

   >4.4, <= 35 ppm*yrs.

32

4.5

44

6.2

0.7

0.5–1.2

   >35 ppm*yrs.

21

3.0

9

1.3

2.1

1.0–4.8

Trend test*

     

P = 0.14

Tetrachloroethene [ppm*yrs.]

      

   0 ppm*yrs.

667

93.9

679

95.6

1.0

-

   >0, <= 9.1 ppm*yrs.

16

2.3

16

2.3

1.1

0.5–2.3

   >9.1, <= 78.8 ppm*yrs.

14

2.0

13

1.8

1.0

0.5–2.2

   >78.8 ppm*yrs.

6

0.8

2

0.3

3.4

0.7–17.3

Trend test*

     

P = 0.12

Carbon tetrachlorine [ppm*yrs.]

      

   0 ppm*yrs.

681

95.9

696

98.0

1.0

-

   >0, <= 2.3 ppm*yrs.

13

1.8

8

1.1

1.9

0.7–5.2

   >2.3, <= 48.1 ppm*yrs.

8

1.1

5

0.7

2.0

0.6–6.9

   >48.1 ppm*yrs.

1

0.1

1

0.1

-

-

Trend test*

     

P = 0.48

Dichloromethane [ppm*yrs.]

      

   0 ppm*yrs.

681

95.9

681

95.9

1.0

-

   >0, <= 26.3 ppm*yrs.

8

1.1

16

2.3

0.4

0.2–1.0

   >26.3, <= 175 ppm*yrs.

9

1.3

11

1.5

0.8

0.3–1.9

   >175 ppm*yrs.

5

0.7

2

0.3

2.2

0.4–11.6

Trend test*

     

P = 0.40

AROMATIC HYDROCARBONS

      

Benzene [ppm*yrs.]

      

   0 ppm*yrs.

591

83.2

590

83.1

1.0

 

   >0, <= 8.6 ppm*yrs.

53

7.5

60

8.5

0.9

0.6–1.3

   >8.6, <= 130 ppm*yrs.

47

6.6

48

6.8

1.0

0.7–1.5

   >130 ppm*yrs.

12

1.7

12

1.7

0.8

0.4–1.9

Trend test*

     

P = 0.87

Toluene [ppm*yrs.]

      

   0 ppm*yrs.

538

75.8

545

76.8

1.0

 

   >0, <= 3.5 ppm*yrs.

81

11.4

80

11.3

1.0

0.7–1.5

   >3.5, <= 207 ppm*yrs.

70

9.9

69

9.7

1.1

0.7–1.5

   >207 ppm*yrs.

14

2.0

16

2.3

0.8

0.4–1.7

Trend test*

     

P = 0.74

Xylene [ppm*yrs.]

      

   0 ppm*yrs.

549

77.3

552

77.7

1.0

 

   >0, <= 4.4 ppm*yrs.

74

10.4

80

11.3

0.9

0.7–1.3

   >4.4, <= 230 ppm*yrs.

68

9.6

63

8.9

1.1

0.7–1.6

   >230 ppm*yrs.

12

1.7

15

2.1

0.8

0.3–1.6

Trend test*

     

P = 0.56

Styrene [ppm*yrs.]

      

   0 ppm*yrs.

542

76.3

541

76.2

1.0

 

   >0, <= 1.5 ppm*yrs.

70

9.9

85

12.0

0.7

0.5–1.0

   >1.5, <= 67.1 ppm*yrs.

79

11.1

67

9.4

1.2

0.8–1.7

   >67.1 ppm*yrs.

12

1.7

17

2.4

0.6

0.3–1.4

Trend test*

     

P = 0.43

  1. Missing values were included as a separate category (not shown)
  2. a Odds Ratio (OR) adjusted for smoking [packyears] and alcohol consumption [g per day]
  3. * To calculate tests for trend, the exposure scores were included as continuous variables in the logistic regression model
  4. Abbreviations: OR = odds ratio; CI = confidence interval; yrs. = years