Effect of working in a coffeehouse on airway disease stratified by smoking
| Smoker | Non-smoker | |||
|---|---|---|---|---|
| Airway disease | Normal | Airway disease | Normal | |
| Coffeehouse | 42 | 59 | 2 | 11 |
| Other | 11 | 65 | 0 | 17 |
| Total | 53 | 124 | 2 | 28 |
| OR (95% CI) | 4.21 (1.88 to 9.59) | 3.09 (0.18 to 98.64) | ||
| Crude OR (95% CI) | 4.69 (2.14 to 10.46) | |||
| M-H OR (95% CI) | 4.52 (2.04 to 10.20) | |||