Pleural Effusion Size and Variables between Uncomplicated and Complicated Parapneumonic Effusions.

Definition of abbreviations: UPPE = uncomplicated parapneumonic effusion; CPPE = complicated parapneumonic effusion; Effusion CXR score = portion of hemithorax opacified by pleural effusion on posteroanterior chest radiograph; LDH = lactate dehydrogenase; PAI-1 = plasminogen activator inhibitor-1; tPA = tissue type plasminogen activator; IL-8 = interleukin-8; VEGF = vascular endothelial growth factor. Data are presented as median (IQR) unless specified. †For comparisons between UPPE and CPPE groups.