Procalcitonin levels in prediction of outcome of patients with pleural infection.

Patients who had died or required surgery were compared with patients with pleural infection who did not die or require surgery.*paired t test or Wilcoxon signed rank test between case and matched controls.将发生死亡或需接受手术的胸膜感染患者，与未发生死亡且无需接受手术的胸膜感染患者进行对照比较。*采用配对t检验（paired t test）或威尔科克森符号秩检验（Wilcoxon signed rank test）对病例组与匹配对照开展组间统计分析。