Table 1 Patient characteristics and perioperative data by study group
Characteristic | BIA group (n = 66) | TRD group (n = 68) | P value* |
|---|---|---|---|
Age [years, mean ± SD] | 46.60 ± 11.80 | 46.40 ± 7.70 | 0.904 |
Male, sex [n (%)] | 39 (59.09) | 39 (57.35) | 0.838 |
BMI [kg/m2, mean ± SD] | 24.00 ± 3.10 | 24.20 ± 2.40 | 0.663 |
Mechanism of injury [n (%)] | 0.619 | ||
 Blunt | 48 (72.7) | 52 (76.5) |  |
 Penetrating | 18 (27.3) | 16 (23.5) |  |
 AIS [mean ± SD] | 8.20 ± 1.40 | 7.90 ± 1.50 | 0.335 |
 ISS [mean ± SD] | 24.80 ± 4.10 | 23.90 ± 3.60 | 0.208 |
 APACHE II [mean ± SD] | 24.00 ± 2.50 | 23.50 ± 2.60 | 0.267 |
 SOFA [mean ± SD] | 10.10 ± 2.30 | 9.80 ± 2.00 | 0.362 |
Indication for open abdomen [n (%)] | 0.944 | ||
 Damage control | 29 (43.94) | 30 (44.12) |  |
 Intra-abdominal infections | 28 (42.42) | 30 (44.12) |  |
 ACS | 9 (13.64) | 8 (11.76) |  |
 Number of reoperations [n, mean ± SD] | 1.65 ± 0.77 | 1.90 ± 0.88 | 0.090 |
 Intraoperative fluid balance [ml, mean ± SD] | 1480.60 ± 511.20 | 1394.90 ± 585.50 | 0.369 |
 POD 1 blood products [U, mean ± SD] | 10.05 ± 4.00 | 10.29 ± 3.90 | 0.714 |
 Number of vasopressors [n, mean ± SD] | 2.35 ± 0.97 | 2.38 ± 0.85 | 0.830 |
 Hydration level on admission to ICU [%, mean ± SD] | 79.60 ± 3.30 | 78.80 ± 5.00 | 0.233 |
 POD 7 hydration level [%, mean ± SD] | 71.50 ± 3.50 | 76.70 ± 3.70 | <  0.001 |
 Mean value of hydration level [%, mean ± SD] | 74.60 ± 4.60 | 78.40 ± 4.50 | <  0.001 |