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Smoking history and habits.
| Controls | Cases | P value | |
|---|---|---|---|
| Smoker | |||
| No | 94.00% | 34.00% | <0.0001 |
| Yes | 6.00% | 66.00% | |
| Cigarette type smoked | |||
| Filtered | 86.70% | 69.80% | 0.198 |
| Nonfiltered | 13.30% | 30.20% | |
| Lives with smoker | |||
| No | 98.00% | 96.00% | 0.558 |
| Yes | 2.00% | 4.00% | |
| Smokes in the house | |||
| No | 98.00% | 94.00% | 0.307 |
| Yes | 2.00% | 6.00% |
