Serum procalcitonin as a predictor of severity of pneumonia in under-five children: A prospective observational study

Figure 1 Study flow diagram. ¹Underlying chronic diseases: (1) Congenital heart diseases (ventricular septal defect, n = 3; atrial septal defect, n = 1; patent ductus arteriosus, n = 1); (2) Neurodevelopmental disorder, n = 3; (3) Bronchopulmonary dysplasia, n = 3; and (4) Chronic liver disease, n = 2. ²Immunosuppression: (1) Nephrotic syndrome on steroid and immunomodulators, n = 2; and (2) Systemic onset juvenile idiopathic arthritis on steroid and tocilizumab, n = 1. ³Post-chemotherapy: Acute lymphoblastic leukemia in remission, n = 1.

Figure 2 Area under curve of procalcitonin level on day 1 and day 5 in predicting mortality. A: Day 1; B: Day 5. PCT: Procalcitonin.