Control (office employees, WCW)

Males

Females

Total

Smokers

1

2

3

Non-smokers

8

2

10

Total (controls)

9

4

13

Exposed Workers (BCW)^a

Years of Exposure

2 - 10

11 - 20

20 - over

Total

Smokers

23

5

4

32

Non-smokers

6

3

5

14

Total (exposed workers)

29

8

9

46