I have a dataset which looks like this:
cbr dust smoking expo
1 0 0.20 1 5
2 0 0.25 1 4
3 0 0.25 1 8
4 0 0.25 1 4
5 0 0.25 1 4
6 0 0.25 1 8
7 0 0.25 1 8
8 0 0.25 1 4
9 1 0.25 1 8
10 0 0.29 1 7
11 0 0.29 0 7
12 0 0.29 1 7
13 0 0.30 0 10
14 0 0.30 1 10
15
16
.
.
.
How can I compare the risk of getting bronchitis between smoker and
no-smoker?
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