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Table 2 Clinical parameters among the four exudates subgroups

From: Expression of YKL-40 and MIP-1a proteins in exudates and transudates: biomarkers for differential diagnosis of pleural effusions? A pilot study

  Tuberculosis (n = 10) Lung Ca (n = 13) Metastatic Ca (n = 15) Parapneumonic effusions (n = 11) P-value
Gender      
 Male 6 (60.0 %) 11 (84.6 %) 8 (53.3 %) 8 (72.7 %) 0.32a
 Female 4 (40.0 %) 2 (15.4 %) 7 (46.7 %) 3 (28.3 %)
Age (mean ± SD, years) 27.1 ± 5.2 71.1 ± 13.3 70.4 ± 11.3 63.2 ± 16.5 <0.001b
Smoking habit      
 Current smokers 0 (0.0 %) 9 (69.2 %) 5 (33.3 %) 5 (45.5 %) 0.023a
 Non-smokers 10 (100.0 %) 3 (23.1 %) 9 (60.0 %) 6 (54.5 %)  
 Ex-smokers 0 (0.0 %) 1 (7.7 %) 1 (6.7 %) 0 (0.0 %)  
Pack-years (mean ± SD) 57.5 ± 29.6 73.3 ± 46.8 29.0 ± 26.6 0.11b
  1. aChi-square test; bKruskal-Wallis H test