Basic characteristics of patients
MOF multi-organ failure, diaphragmatic thickening
A total of 80 patients were finally enrolled in this study, with 40 patients in the study group and 40 patients in the control group. There was no significant difference in the general demographic information between the two groups (all P > 0.05) (Table 
Basic Characteristics and Ultrasound measurements at basic status of patientsBMI, body mass index; APACHE II, Acute Physiology and Chronic Health Evaluation (II); DE, diaphragmatic excursion; DTF, diaphragmatic thickening fraction; TIM, thickness of intercostal muscles; TRA, thickness of rectus abdominis; CSA-RF, cross-sectional area of rectus femoris; MOF multi-organ failure