Figure 3From: Lung abscess predicts the surgical outcome in patients with pleural empyema Survival curves after surgery. The survival curves used the Kaplan-Meier method and differences were calculated using the log-rank test. Upper panel: The 30 days survival shows a significant difference (P = 0.003). Lower panel: The overall post-operative survival between the 2 groups also shows a significant difference (P = 0.004).Back to article page