The PNEUMOINDEX is predictive of the occurrence of pneumonia during the hospital stay, and was calculated using the formula:PNEUMOINDEX = (1.516 × NYHA III & IV) + (0.978 × COPD) + (1.117 × extracardiac arteriopathy) + (0.141 × NIHHS on the day of admission) + (0.153 × CRP/HGB)(2). Here, CYGB is linked to susceptibility to pneumonia measurement.