Baseline indices of gas exchange prior to drainage of pleural effusion
| Control group | Drain group | p Value* | |
|---|---|---|---|
| PaO2/FiO2 ratio (kPa) | 36.21±11.29 N=82 | 31.01±8.92 N=52 | 0.002 |
| Oxygenation index (kPa/cm H2O) | 3.60±1.75 N=75 | 2.88±1.10 N=40 | 0.019 |
| Ventilation index (cm H2O kPa/min) | 13.87±5.38 N=45 | 20.15±8.85 N=30 | 0.012 |
Data displayed as mean±SD of N observations.
*Determined by unpaired Student t test.
FiO2, fractional inspired oxygen; PaO2, arterial oxygen tension.