Range comparisons of categorical variables between patients with haemopneumothorax (SHP) and pneumothorax (HP)
| Variable | SHP | SP | p* |
|---|---|---|---|
| Mean (SD) | Mean (SD) | ||
| *p value for Wilcoxon’s rank sum test. | |||
| †Data available on four patients with SHP and 129 patients with SP. | |||
| APTT, activated partial thromboplastin time. | |||
| Age | 24.0 (7.1) | 28.8 (13.6) | 0.46 |
| Body weight (kg) | 56.1 (3.5) | 56.8 (8.2) | >0.95 |
| Height (cm) | 177.4 (5.4) | 170.3 (6.0) | <0.01 |
| Body mass index (kg/m2) | 17.9 (1.7) | 19.6 (2.5) | 0.06 |
| Haemoglobin (g/dl) | 12.8 (2.6) | 14.7 (1.4) | 0.01 |
| Haematocrit (%) | 38.1 (7.2) | 44.1 (4.3) | <0.01 |
| Prothrombin time† (seconds) | 11.8 (0.8) | 12.4 (1.6) | 0.16 |
| International normalised ratio† | 1.0 (0.1) | 1.0 (0.1) | 0.31 |
| APTT† (seconds) | 35.2 (3.6) | 36.5 (5.3) | 0.50 |
| Platelets (×103/mm3) | 275.6 (164.7) | 252.8 (63.6) | 0.39 |
| Systolic blood pressure (mm Hg) | 136.1 (18.9) | 129.5 (18.4) | 0.38 |
| Diastolic blood pressure (mm Hg) | 74.3 (12.2) | 75.3 (13.6) | 0.53 |
| Heart rate (per minute) | 101.0 (23.0) | 88.0 (17.3) | 0.09 |
| Respiratory rate (per minute) | 19.6 (1.3) | 20.1 (1.7) | 0.33 |