Haematological and biochemical analysis of pleural fluids in diagnoses subgroups
| Variable | Malignant | Other exudates | Idiopathic | Post-CABG | Parapneumonic | Transudates |
| pH | 7.35±0.09* | 7.38±0.04 | 7.37±0.05* | 7.40±0.02 | 7.36±0.07* | 7.40±0.07 |
| Glucose mg·dL−1 | 112.1±44.5* | 111.4±36.8* | 120.6±33.9* | 168.7±78.8 | 121.3±57.7 | 139.4±57.6 |
| Protein mg·dL−1 | 4.4±1.0* | 5.3±4.2* | 4.0±1.0* | 4.1±0.8* | 4.4±1.1* | 2.4±1.6 |
| Cholesterol mg·dL−1 | 84.8±29.7* | 84.6±29.1* | 79.0±32.3* | 80.0±27.6* | 93.5±42.7* | 34.3±20.2 |
| LDH IU·L−1 | 740.3±808.5* | 403.5±287.6* | 372.9±271.8* | 195.5±81.5 | 490.6±333.0* | 177.2±83.1 |
| WBC µL | 2685±5153 | 2487±2887 | 1847±1539 | 815±321 | 2615±3013 | 1787±4871 |
| Neutrophil % | 13.75±10.61 | 15.45±7.96 | 12.78±8.80 | 9.07±6.49 | 12.30±8.70 | 15.00±10.69 |
| Lymphocyte % | 72.87±13.65* | 69.52±12.60 | 73.60±12.73* | 72.92±4.69 | 70.37±12.83 | 68.03±12.18 |
| Monocyte % | 7.05±6.26* | 9.50±7.61 | 6.87±5.08* | 12.34±4.96 | 9.06±8.55 | 9.92±7.68 |
Data are presented as mean±sd
CABG: coronary artery bypass grafting
LDH: lactate dehydrogenase
WBC: white blood cell
*: p<0.05 compared with the transudate group