Table 3.

Predictive accuracy of potential variables for the weaning outcome.

Variables	AUC	95% CI	Cut-off point	Sensitivity (%)	Specificity (%)
BNP	0.680*	0.581–0.767	170.6	100.0	43.2
LAP	0.764*	0.671–0.842	11.8	91.7	53.1
LUS	0.781*	0.690–0.856	8.9	95.8	50.6
Hemidiaphragm dysfunction	–	–	–	58.3	67.9
Combined model	0.919	0.850–0.963	0.26	91.7	82.7

95% CI – 95% confidence interval; AUC – area under curve; BNP – brain natriuretic peptide; LAP – left-atrial pressure; LUS – lung ultrasound score; compared with the combined model,

^*P<0.0.