| Dairy workers (n = 185) | Control workers (n = 45) | ||||||
| Mean (SD) | Median | n | % | Mean (SD) | Median | n | % |
Never smokers |
|
| 101 | 54.6 |
|
| 31 | 68.9 |
Former smokers |
|
| 36 | 19.5 |
|
| 8 | 17.8 |
Current smokers |
|
| 48 | 25.9 |
|
| 6 | 13.3 |
Pack yearsa | 5.5 (7.1) | 3.1 |
|
| 3.72 (4.7) | 1.7 |
|
|
Cigarettes per dayb | 8.2 (1) | 5 |
|
| 4.5 (1.5) | 2.5 |
|
|
Shift use |
|
| 25 | 13.5 |
|
| 0 | 0.0 |
Cigarettes per shiftc | 4 (3.3) | 3 |
|
| 0 | 0 |
|
|
Exposure to second-hand smoke |
|
|
|
|
|
|
|
|
None |
|
| 97 | 52.4 |
|
| 27 | 60.0 |
At home only |
|
| 42 | 22.7 |
|
| 13 | 28.9 |
At work only |
|
| 43 | 23.2 |
|
| 5 | 11.1 |
At home and work |
|
| 3 | 1.6 |
|
| 0 | 0.0 |
Time exposed at work during observed shift (mins) | 26.9 (7.5) | 10 |
|
| 0.2 (0.2) | 0.5 |
|
|