The results showed that the differences in BMI, CAD, COPD, AHF, pneumonia, APS-III, OASIS, SOFA score, GCS score, WBC count, neutrophil count, lymphocyte count, monocyte count, Alb, SCr, NLR, PNI, use of vasoactive drugs, use of sedative drugs, nasal nutrition, and PN between two groups were statistically significant (p < 0.05). The gene discussed is ALB; the disease is susceptibility to pneumonia measurement.