Fig 1.
Representative computed tomography image at the level of the L3 vertebral body.
The red lines represent the greatest anterior/posterior and transverse diameters of psoas muscle obtained by using a picture archiving and communications system.
Table 1.
Demographic characteristics upon ICU admission and clinical outcomes of the study patients.
Table 2.
Indications for the use of mechanical ventilation (n = 96).
Table 3.
Clinical demographic characteristics of patients, categorized by weaning outcome and ICU mortality, upon ICU admission.
Table 4.
Results of the laboratory examination and the weaning profiles of study patients categorized by weaning outcome and ICU mortality.
Table 5.
Multivariate logistic regression analysis of independent predictive factors for weaning outcome and ICU mortality.
Fig 2.
Receiver operating characteristic (ROC) curves for various predictors of weaning outcomes in the study patients.
TPA represents the total psoas muscle area. Panels A and B show ROC curves predicting successful weaning when TPA alone was used for analysis of female and male patients, respectively. A logit model of the logistic regression incorporating 5 conventional weaning parameters (WS-5P; with respiratory rate, tidal volume, rapid-shallow breathing index, maximum inspiratory pressure, and PaO2/FiO2 ratio as the included weaning parameters) or that model in combination with TPA (WS-5P+TPA) was employed to yield a single weaning score. Panels C and D show ROC curves predicting difficult-to-wean (DtW) when WS-5P and WS-5P+TPA were used for analysis of female and male patients, respectively. The purple line is the reference line.
Table 6.
Area under the receiver operating characteristic (ROC) curves for various predictors of weaning outcomes in the study patients.