Fig. 2From: The association of serum procalcitonin and high-sensitivity C-reactive protein with pneumonia in elderly multimorbid patients with respiratory symptoms: retrospective cohort studySerum procalcitonin as marker of pneumonia. Panel a) Comparison of serum procalcitonin values in patients with (n = 239) and without pneumonia (n = 216). Panel b) Comparison of serum procalcitonin values between patients with pneumonia and a diagnostic chest X-ray (n = 125) and patients with pneumonia and a non-diagnostic chest X-ray (n = 114)Back to article page