Table 2. Clinical data of the two groups during operation.
| Variables | All | MELD <18 group (n=751) | MELD ≥18 group (n=244) | Statistical value | P |
|---|---|---|---|---|---|
| Emergency operation | 71 (7.14) | 45 (5.99) | 26 (10.66) | 6.045 | 0.01 |
| Duration of anesthesia (min) | 425 [350, 510] | 410 [340, 485] | 467.5 [396, 599] | 7.271 | <0.001 |
| Operating room time (min) | 445 [370, 530] | 435 [360, 510] | 495 [420, 619] | 7.311 | <0.001 |
| Operation time (min) | 360 [285, 440] | 345 [275, 420] | 403 [335, 524] | 7.397 | <0.001 |
| CPB time (min) | 200 [160, 250] | 195 [150, 240] | 230 [185, 270] | 7.362 | <0.001 |
| Invasive MAP (mmHg) | 66 [64, 68] | 66 [64, 68] | 64 [60, 68] | −4.839 | <0.001 |
| BIS | 37 [31, 41] | 38 [33, 41] | 35 [29, 40] | −4.972 | <0.001 |
| CI (L/min/m2) | 2.3 [2.0, 2.7] | 2.3 [2.0, 2.7] | 2.4 [2.0, 2.8] | 1.443 | 0.15 |
| CVP (mmHg) | 6 [4, 7] | 6 [2, 7] | 6 [4, 7] | 2.264 | 0.02 |
| PEEP (cmH2O) | 0 [0, 2.5] | 0.5 [0, 2.0] | 0 [0, 3.0] | −0.425 | 0.67 |
| Respiratory rate (/min) | 11 [10, 12] | 11 [10, 12] | 11 [10, 12] | −1.341 | 0.18 |
| Intraoperative tidal volume (mL) | 432 [384, 472] | 440 [384, 472] | 424 [368, 472] | −1.957 | 0.05 |
Data are presented as median [P25, P75] or n (%). MELD, model for end-stage liver disease; CPB, cardiopulmonary bypass; MAP, mean arterial pressure; BIS, bispectral index score; CI, cardiac index; CVP, central venous pressure; PEEP, positive end-respiratory pressure.