ALB and susceptibility to pneumonia measurement: There were significant differences in age (p = 0.0218), causing disease (pneumonia p = 0.0435, ILD p = 0.0294), vital sigh at admission (S/F ratio p = 0.00015, RR p < 0.0001, ROX p < 0.0001), laboratory variables (WBC p = 0.0231, neutrophil count p = 0.0044, NLR p = 0.0162, Alb p = 0.0295, D-dimer p = 0.0294), CCI (p = 0.0406), CFS (p = 0.0006), and MNA-SF score (p < 0.0001).