Reference

Study Population

Exposed Cases

Estimated Relative Risk (95% CI)

Methylene Chloride

Cohort Studies—Mortality

Hearne et al., 1999

Male cellulose triacetate photographic-film base workers in Kodak Park, employed >1 year

 

 

Methylene chloride cohort

27

0.75 (0.49–1.09)

 

Roll-coating cohort

 

 

New York state external control

28

0.82 (0.55–1.19)

 

Kodak Rochester external control

28

0.89 (0.59–1.29)

Tomensen et al., 1997

Male cellulose triacetate-fiber production workers in the UK, ever employed

 

 

Never exposed

1

0.16 (0–0.88)

 

All exposed

19

0.48 (0.29–0.75)

 

Cumulative exposure (nonsmokers)

 

 

<400 ppm-years

6

0.32

 

400–799 ppm-years

2

0.51

 

≥800 ppm-years

1

0.37

 

Unassigned exposure

10

0.68

Gibbs et al., 1996

Cellulose triacetate-fiber production workers in Maryland

 

 

Males

 

 

No exposure

6

0.59 (0.22–1.29)

 

Low exposure

20

0.78 (0.48–1.20)

 

High exposure

15

0.55 (0.31–0.91)

 

Females

 

 

No exposure

0

NA (0.0–4.92)

 

Low exposure

9

1.09 (0.50–2.07)

 

High exposure

2

2.29 (0.28–8.29)

Lanes et al., 1993

Cellulose triacetate-fiber production workers in South Carolina (cohort), employed >3 months

13

0.80 (0.43–1.37)

Benzene

Cohort Studies—Mortality

Yin et al., 1996a

Chinese factory workers, ever exposed

 

 

Total cohort

125

1.4 (1.0–2.0)

 

Males

109

1.5 (1.0–2.2)

 

Females

16

1.0 (0.4–2.9)

Hayes et al., 1996

Chinese factory workers

 

 

Cumulative exposure

 

 

No exposure

41

1.0

 

<10 ppm-years

10

1.2

 

10–39 ppm-years

13

1.0

 

40–99 ppm-years

19

1.4

 

100–400 ppm-years

38

1.4

 

400+ ppm-years

41

1.7

 

 

 

p-trend=0.01

Greenland et al., 1994

White male transformer-assembly workers, ever exposed

NA

0.58 (0.31–1.07)

Wilcosky et al., 1984

Rubber-industry workers in Ohio

 

 

Cumulative exposure of more than 1 year

 

 

White males

23

0.69



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