|  | Prolonged | Successful | P value | |
---|---|---|---|---|---|
 | Dead | weaning | weaning | P1 | P2 |
APACHE II | 21.2 | 17.3 | 12.6 | 0.0410 | 0.0010 |
VE (l/min) | 9.5 | 9.6 | 10.3 | 0.9575 | 0.4480 |
PImax (cm H2O) | 53 | 44 | 59 | 0.2491 | 0.0169 |
f/VT | 120 | 95 | 87 | 0.2955 | 0.5532 |
RIE | 0.406 | 0.605 | 0.507 | 0.1588 | 0.2877 |
A+B+G | 39 | 56 | 54 | 0.0077 | 0.6062 |