Table 2

 Range comparisons of categorical variables between patients with haemopneumothorax (SHP) and pneumothorax (HP)

VariableSHPSPp*
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.
Age24.0 (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