Table 2 Odds ratio and comparison of risk factors between the two groups
From: Do bullae and emphysema increase risk of pneumothorax in silicosis?
Risk Factor | Â | Pneumothorax | Odds ratio | 95% Confidence Interval | |
|---|---|---|---|---|---|
| Â | Â | No | Yes | Â | Â |
Bullae | No | 10 | 1 | 15 | 1.3–168 |
| Â | Yes | 4 | 6 | Â | Â |
Emphysema | No | 9 | 1 | 10.8 | .997–117 |
| Â | Yes | 5 | 6 | Â | Â |