Table 2 Distribution of patients and results of five models of logistic regressions (wood industry only)

Model 1. First exposure to wood dust

Reference

4

15

1

-

-

1970-today

5

2

9.37

1.29–67.6

0.026

1956–1970

6

1

22.5

2.06–245.

0.011

Pre-1956

6

1

22.5

2.06–245.

0.011

Model 2. Frequency of exposure to wood dust

Reference

4

15

1

-

-

Low

7

2

13.1

1.92–89.5

0.009

High

10

2

18.8

2.87–122.

0.002

Model 3. Protection from wood dust

Reference

4

15

1

-

-

Low

12

2

22.5

3.50–144.

0.001

High

5

2

9.37

1.29–67.6

0.026

Model 4. Wood used

Reference

4

15

1

-

-

Other woods

8

3

10.0

1.78–56.1

0.009

Hardwood

9

1

33.8

3.22–351.

0.003

Model 5. Duration of exposure to wood dust

Reference

4

15

1

-

-

<15 years

4

0

1.0

-

.

≥15 years

13

4

12.2

2.52–58.7

0.002