Table 1 Characteristics, smoking habits and past respiratory disease for coffee workers and controls

Age (years); AM (range)

40 (19 - 65)

31 (18 - 54) ^a **

BMI (kg/m²); AM (range)

22.3(17.0 - 30.9)

22.4(17.1 - 30.5)

Weight (kg); AM (range)

65 (51 - 98)

66 (42 - 100)

Height (m); AM (range)

1.70 (1.53 - 1.85)

1.70 (1.54 - 1.91)

Years at present work; AM (range)

12 (0 - 41)

5(0 - 27)

Years worked in other dusty factories; AM (range)

2.8(0 - 43)

1.7 (0 - 17)

Smoking Habits

Never smoked; n (%)

41 (52)

49 (69)

Ever smoked; n (%)

38 (48)

22 (31)

Current smokers; n (%)

23 (29)

10 (14) ^b **

Cigarettes smoked per

day for current smokers; AM (range)

4 (1-15)

3.4 (1-6)

Previous Respiratory Disease

Chest injury; n (%)

1 (1.3)

0

Pneumonia; n (%)

24 (30.4)

13 (18.3)

Pleuritis; n (%)

1 (1.3)

0

Bronchitis; n (%)

1 (1.3)

0

Tuberculosis; n (%)

2 (2.5)

1 (1.4)

Asthma; n (%)

3 (3.8)

6 (8.5)

Other chest problems; n (%)

4 (5)

3 (4.2)

Participants who have had at least one of the respiratory diseases; n (%)

31 (39.2)

21 (29.6)