Table 1.

Clinical characteristics of the study population and pleural fluid parameters.

	Malignancy	Heart failure	Parapneumonic total effusions	Parapneumonic empyema only	Lung transplant	p value
n	119/244 (53.1%)	44/244 (19.6%)	38/244 (16.9%)	6/244 (2.4%)	23 (10.2%)
Male, (%)	52.9	77.3	50	60%	15	0.02
Age, years	70.9 ± 12	76.2 ± 10.6	64 ± 17.9	59.5 ± 19.7	58.3 ± 6.4	<0.001
Amount, mL	1514.4 ± 1694.5	1380.6 ± 668.2	983.4 ± 552.6	681.6 ± 439.5	715.2 ± 259.9	=0.01
CRP level, mg/dL	1.19 ± 1.51	0.57 ± 0.81	5.38 ± 4.85	9.06 ± 6.72	2.77 ± 2.66	<0.001
WBC, K/micL	2.49 ± 7.56	0.81 ± 1.05	1.59 ± 1.84	2.2 ± 1.1	9.13 ± 21.82	=0.003
Neutrophils, %	21.31 ± 15.48	17.86 ± 11.86	30.5 ± 26.3	44.3 ± 40	22.33 ± 24.53	0.01
Lymphocyte, %	51.79 ± 23.97	51.33 ± 23.27	44.92 ± 28.19	30.1 ± 30	60.99 ± 30.09	NS
Eosinophils, %	1.38 ± 2.25	0.99 ± 1.08	1.83 ± 2.92	0.76 ± 1	0.64 ± 1.05	NS
Cholesterol, mg/dL	74.64 ± 33.58	36.9 ± 18.77	59.63 ± 33.64	69 ± 26.9	82.09 ± 37.44	<0.001
Triglyceride, mg/dL	47.92 ± 186.24	21.1 ± 16.37	34.95 ± 33.21	68.4 ± 79	33.55 ± 20.96	NS
Glucose, mg/dL	116.93 ± 51.35	133.24 ± 41.22	113.74 ± 55.27	68 ± 58.7	133.7 ± 63.75	NS
Total protein, g/dL	4.31 ± 1.06	3.07 ± 1.05	3.22 ± 1.16	3.98 ± 0.96	3.51 ± 0.84	<0.001
Amylase, U/L	100.99 ± 309.9	48.97 ± 23.52	37.36 ± 21.99	37.4 ± 25.6	35.85 ± 16.22	NS
LDH, U/L	613.31 ± 1327.75	405.21 ± 1122.89	998.39 ± 2244.33	4336.6 ± 5235.1	2337.1 ± 6176.01	0.01
pH	7.45 ± 0.13	7.47 ± 0.08	7.4 ± 0.23	7.29 ± 0.32	7.47 ± 0.24	NS

All parameters are from pleural fluids.