Table 2: Distribution of study population according to smoking, FEV1, Delta FEV1and FEV1/FVC.
|
Smokers
|
|
Taxi Drivers (n = 200) (%) |
Employees (n = 120 (%) |
|
No |
60 (30) |
30 (25) |
|
|
Yes |
140 (70) |
90 (75) |
|
|
Smoking- pack-years
|
< 20 |
152 (76) |
86 (72) |
|
20-39 |
34 (17) |
24 (20) |
|
|
40-60 |
8 (4) |
10 (8) |
|
|
> 60 |
6 (3) |
0 (0) |
|
|
Smoking waterpipe
|
No |
165 (82.5) |
90 (75) |
|
Yes |
35 (17.5) |
30 (25) |
|
|
FEV1(% of predicted)
|
> 80 |
100 (50) |
82 (68) |
|
71-80 |
56 (28) |
14 (12) |
|
|
51-70 |
40 (20) |
18 (15) |
|
|
30-50 |
4 (2) |
6 (5) |
|
|
< 30 |
0 (0) |
0 (0) |
|
|
Delta FEV1 (%)
|
0-15 > 15 |
198 (99) 2 (1) |
118 (98) 2 (2) |
|
Post bronchodilator FEV1/FVC ratio
|
< 0.7 > 0.7 |
64 (32) 136 (68) |
32 (27) 88 (73) |