Variable

N

%

Gender

Male

23

54.8

Female

19

45.2

Age

Adult

31

73.8

Elder

11

26.2

Color

Black

26

61.9

Brown

16

38.1

Alcohol-drinking

No

27

64.3

Yes

15

35.7

Alcohol-drinking frequency

Never

27

64.3

Socially

11

26.2

Daily

4

9.5

Exposure period

<10 years

24

57.2

10 to 20 years

9

21.4

>20 years

9

21.4

Post-exposure period

Up to 2 years

13

30.9

>2 years

29

69.1

Respiratory disease Respiratória

No

34

80.9

Yes

8

19.1

Acute respiratory disease

No

34

80.9

Yes

8

19.1

Smoking habit

No

33

78.6

Yes

9

21.4

Resp. disease symptomatic

No

19

45.2

Yes

23

54.8

Spirometry

Normal

24

57.1

Mild obstruction

13

31.0

Moderate obstruction

5

11.9