30-day complications, Clavien-Dindo grade IV, and mortality for the dehydrated and not dehydrated groups.
| Complication | Dehydration (Blood Urea Nitrogen/Creatinine >20) | P | |||
| Not Dehydrated | Dehydrated | ||||
| N | % | N | % | ||
| Any | |||||
| No | 10,328 | 96.3% | 3966 | 94.3% | <0.001 |
| Yes | 398 | 3.7% | 240 | 5.7% | |
| Pulmonary (combined) | |||||
| No | 10,593 | 98.8% | 4103 | 97.6% | <0.001 |
| Yes | 133 | 1.2% | 103 | 2.4% | |
| Cardiac (combined) | |||||
| No | 10,698 | 99.7% | 4183 | 99.5% | 0.006 |
| Yes | 28 | 0.3% | 23 | 0.5% | |
| Wound (combined) | |||||
| No | 10,603 | 98.9% | 4132 | 98.2% | 0.002 |
| Yes | 123 | 1.1% | 74 | 1.8% | |
| Hematological (combined) | |||||
| No | 10,651 | 99.3% | 4150 | 98.7% | <0.001 |
| Yes | 75 | 0.7% | 56 | 1.3% | |
| Renal (combined) | |||||
| No | 10,708 | 99.8% | 4202 | 99.9% | 0.214 |
| Yes | 18 | 0.2% | 4 | 0.1% | |
| Clavien-Dindo Grade IV | |||||
| No | 10,664 | 99.4% | 4148 | 98.6% | <0.001 |
| Yes | 62 | 0.6% | 58 | 1.4% | |
| 30-d Mortality | |||||
| Lived | 10,705 | 99.8% | 4186 | 99.5% | 0.003 |
| Death in 30 days | 21 | 0.2% | 20 | 0.5% | |