Percentage comparison of categorical variables between patients with haemopneumothorax (SHP) and pneumothorax (HP)
| Variable | SHP n (%) | SP n (%) | Odds ratio*(95% CI) | p† |
|---|---|---|---|---|
| *Logit estimators were obtained using a correction of 0.5 in every cell when any of the cells had the value 0; CI, confidence interval. | ||||
| †p value for Fisher’s exact test. | ||||
| Male sex | 8 (100.0) | 184 (90.6) | 1.8 (0.1 to 32.3) | >0.95 |
| Smoking | 6 (75.0) | 102 (50.5) | 2.9 (0.6 to 13.9) | 0.28 |
| Dyspnoea | 5 (62.5) | 54 (26.6) | 4.6 (1.1 to 20.0) | 0.04 |
| Chest pain | 8 (100.0) | 179 (88.2) | 2.3 (0.1 to 41.6) | 0.60 |