Table 2 Diagnostic accuracy of a new weaning index (diaphragmatic index) with tidal breathing, during deep breathing and traditional weaning
Variables | Cutoff | Sensitivity | Specificity | PPV | NPV | AUC | p |
|---|---|---|---|---|---|---|---|
Traditional weaning | |||||||
PaO2/FIO2 | >202.5 | 61% | 95% | 73% | 92% | 84% | < 0.001 |
RR | <16.5 | 72% | 70% | 34% | 92% | 80% | < 0.001 |
MV(L/m) | <8.7 | 42% | 90% | 47% | 87% | 68% | 0.01 |
RSBI | <35.5 | 47% | 90% | 51% | 188% | 71% | < 0.001 |
During tidal breathing | |||||||
DT Insp | > 21 | 95% | 100% | 100% | 99% | 95% | < 0.001 |
DT Exp (FRC) | >15.5 | 62% | 100% | 100% | 92% | 85% | < 0.001 |
DTF% | >32.82 | 90% | 75% | 44% | 97% | 77% | < 0.001 |
DE | >1.7 | 68% | 65% | 30% | 90% | 73% | < 0.001 |
During deep breathing | |||||||
DT Insp (TLC) | >28.5 | 100% | 65% | 39% | 100% | 87% | < 0.001 |
DT Exp (RV) | >22.5 | 73% | 75% | 39% | 93% | 75% | < 0.001 |
DTF % | >37 | 97% | 100% | 100% | 99% | 100% | < 0.001 |
DE | >3.1 | 75% | 55% | 27% | 91% | 68% | 0.01 |