Objective The correlation of skeletal muscle mass index(SMI)and sarcopenia index(SI)with nutritional status and prognosis of respiratory critical illness was analyzed.Methods A total of 130 critically ill respiratory pa-tients treated in Tianjin beichen district traditional chinese medicine hospital from May 2020 to June 2022 were select-ed,and their nutritional status was evaluated according to the Modified Critical Illness Nutritional Risk Scale(mNU-TRIC),and SMI and SI levels of different nutritional status were compared.Multivariate Logistic regression model was used to explore the risk factors of death from respiratory critically ill patients,and receiver operating characteristic(ROC)curve was used to determine the evaluation value of SMI and SI in the risk of death from respiratory critically ill patients.Results Among the 130 patients,48 cases of high nutritional risk were set as high risk group and 82 cases of low nutritional risk were set as low risk group.The SMI and SI of high risk group were lower than those of low risk group(P<0.05).At the time of leaving ICU,36 of the 130 patients died in the poor prognosis group and 94 survived in the good prognosis group.The age,APACHE Ⅱ score and PCT level of the poor prognosis group were higher than those of the good prognosis group,while the ALB,SI and SMI of the poor prognosis group were lower than those of the good prognosis group(P<0.05).Multivariate Logistic regression model analysis confirmed that high APACHE Ⅱscore and low SMI and SI values were independent risk factors for death from respiratory critical illness(P<0.05).ROC confirmed that the predicted AUC of 0.890 of SMI and SI in the death prediction of respiratory critically ill pa-tients was higher than 0.784 and 0.726 separately(P<0.05).Conclusion The levels of SMI and SI are closely related to the nutritional status of patients with respiratory critical illness.Monitoring the levels of SMI and SI can predict and evaluate the risk of disease and death,and it has high clinical value to predict the death of patients.
Respiratory critical illnessSkeletal muscle mass indexSarcopenia indexNutritional status