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Table 1 Subjects’ characteristics

From: Improved heart hemodynamics after draining large-volume pleural effusion: a prospective cohort study

Variables Total Lateral of effusion, n (%) P* value
Left Right
Subjects, n(%) 47 (100.0) 23 (48.9) 24 (51.1)  
Gender, n (%)
 Female 18 (38.3) 5 (21.7) 13 (54.2) 0.022
 Male 29 (61.7) 18 (78.3) 11 (45.8)  
Age, yr., mean ± SD 56.4 ± 19.5 52.6 ± 19.0 63.1 ± 17.3 0.726
BSA, mean ± SD 1.73 ± 0.19 1.83 ± 0.16 1.63 ± 0.17 0.582
Smoking status, n (%)
 Current or previous smoker 18 (38.3) 6 (26.1) 12 (50.0) 0.092
 Non-smoker 29 (61.7) 17 (73.9) 12 (50.0)  
Past history
 Tuberculosis 4 (8.5) 3 (13.0) 1 (4.2) 0.546
 Malignancy 4 (8.5) 2 (8.7) 2 (8.3)  
 NA 39 (83.0) 18 (78.3) 21 (87.5)  
Size of effusion, n (%)
 Small 8 (17.0) 3 (13.0) 5 (20.8) 0.696
 Moderate 9 (19.1) 4 (17.4) 5 (20.8)  
 Large 30 (63.9) 16 (69.6) 14 (58.3)  
volume of effusion, (ml)
 Total volume 2142.2 ± 1393.7 2194.6 ± 1511.1 2203.6 ± 1301.8 0.827
 Immediate volume 1414.4 ± 727.9 1384.8 ± 982.0 1495.2 ± 947.6 0.744
 24 h volume 943.6 ± 742.8 809.8 ± 787.2 708.4 ± 708.0 0.855
Effusion appearance, n (%)
 Bloody 20 (42.5) 11 (47.8) 9 (37.5) 0.474
 Yellow 27 (57.5) 12 (52.2) 15 (62.5)  
Operation
 IPC 15 (31.9) 8 (34.8) 7 (29.2) 0.893
 Thoracentesis 10 (21.3) 5 (21.7) 5 (20.8)  
 thoracoscopic 22 (46.8) 10 (43.5) 12 (50.0)  
Pre Nt-pro-BNP (ng/ml) 221.3 ± 316.5 126.7 ± 176.6 320.2 ± 396.5 0.004
  1. Abbreviations: SD standard deviation, IPC indwelling pleural catheter
  2. P*, Wilcoxon’s test or Pearson’s χ2 test, P < 0.05