| Total Population n = 1393 |  | Never smokers n = 622 |  | ||||
---|---|---|---|---|---|---|---|---|
 | Case, n | Control, n | ORa | 95%CI | Case, n | Control, n | ORb | 95%CI |
 | 445 | 948 |  |  | 156 | 466 |  |  |
Emphysema | Â | Â | Â | Â | Â | Â | Â | Â |
   Never | 414 | 940 | 1.0 | Ref | 154 | 465 | 1.0 | Ref |
   Ever | 31 | 8 | 4.8 | 2.0-11.1 | 2 | 1 | 3.1 | 0.3-35.9 |
Chronic Bronchitis | Â | Â | Â | Â | Â | Â | Â | Â |
   Never | 424 | 899 | 1.0 | Ref | 153 | 440 | 1.0 | Ref |
   Ever | 21 | 49 | 0.9 | 0.5-1.7 | 3 | 26 | 0.4 | 0.1-1.5 |
Asthma | Â | Â | Â | Â | Â | Â | Â | Â |
   Never | 388 | 835 | 1.0 | Ref | 140 | 408 | 1.0 | Ref |
   Ever | 57 | 113 | 1.2 | 0.8-1.8 | 16 | 58 | 1.0 | 0.5-1.9 |
Pneumonia | Â | Â | Â | Â | Â | Â | Â | Â |
   Never | 434 | 913 | 1.0 | Ref | 151 | 456 | 1.0 | Ref |
   Ever | 11 | 35 | 0.6 | 0.3-1.2 | 5 | 10 | 1.9 | 0.6-6.2 |
Tuberculosis | Â | Â | Â | Â | Â | Â | Â | Â |
   Never | 439 | 943 | 1.0 | Ref | 153 | 463 | 1.0 | Ref |
   Ever | 6 | 5 | 2.6 | 0.7-9.2 | 3 | 3 | 2.2 | 0.4-12.5 |
Other respiratory illness | Â | Â | Â | Â | Â | Â | ||
   Never | 385 | 823 | 1.0 | Ref | 139 | 403 | 1.0 | Ref |
   Ever | 60 | 125 | 1.1 | 0.8-1.6 | 17 | 63 | 0.9 | 0.5-1.7 |