Figure 4 Prediction ability of DTF, and ΔTF for RNMB and hypoxemia, and the correlation of DTF, ΔTF, and TOFr. (A) Spearman correlation analyses of ΔTF and TOFr; (B) Spearman correlation analyses of DTF and TOFr; (C) Receiver operating characteristic curve of DTF (Line a), and ΔTF (Line b). (D) Decision curve analysis curve of the 2 prediction models, with “a Model” representing for DTF, “b Model” representing for ΔTF. DTF – diaphragm thickening fraction; ΔTF – defined as comparing thickening fractioning to the corresponding baseline value; TOFr – train of four ratio; TPR – true positive rate; FPR – false-positive rate; AUC – the area under the receiver operating characteristic curve. (Figure created via R environment version 4.2.0).