CRP and pneumonia: Pneumonia was diagnosed based on the following: the Japanese Respiratory Society guidelines [17]; clinical symptoms confirmed by radiologic findings or detection of enteral feed material in aspirate from the trachea26; body temperature ≥37.5 °C; respiratory symptoms; abnormal blood test results, including for white blood cell count and C-reactive protein level; and infiltrative shadow observed on chest radiography or chest computed tomography [27].