ASA scores, comorbidities, and MCCI for the dehydrated and not dehydrated groups.
| Variables | Dehydration (Blood Urea Nitrogen/Creatinine >20) | P | |||
| Not Dehydrated | Dehydrated | ||||
| N | % | N | % | ||
| ASA Classification | |||||
| 1 | 317 | 3.0% | 98 | 2.3% | <0.001 |
| 2 | 5637 | 52.6% | 1967 | 46.8% | |
| 3 | 4517 | 42.1% | 1993 | 47.4% | |
| 4 | 247 | 2.3% | 143 | 3.4% | |
| 5 | 1 | 0.0% | 2 | 0.0% | |
| None assigned | 7 | 0.1% | 3 | 0.1% | |
| Osteoporosis Diagnosis | |||||
| No | 10,713 | 99.9% | 4199 | 99.8% | |
| Yes | 13 | 0.1% | 7 | 0.2% | |
| History of Congestive Heart Failure | |||||
| No | 10,689 | 99.7% | 4188 | 99.6% | |
| Yes | 37 | 0.3% | 18 | 0.4% | |
| History of Hypertension | |||||
| No | 5673 | 52.9% | 2007 | 47.7% | |
| Yes | 5053 | 47.1% | 2199 | 52.3% | |
| History of Severe COPD | |||||
| No | 10,280 | 95.8% | 4003 | 95.2% | |
| Yes | 446 | 4.2% | 203 | 4.8% | |
| Diabetes | |||||
| No | 8951 | 83.5% | 3314 | 78.8% | |
| Yes | 1775 | 16.5% | 892 | 21.2% | |
| MCCI Score by Increments | |||||
| 0 | 10,349 | 96.5% | 3981 | 94.7% | <0.001 |
| 0–25 | 124 | 1.2% | 72 | 1.7% | |
| 25–42 | 178 | 1.7% | 85 | 2.0% | |
| 42–50 | 41 | 0.4% | 32 | 0.8% | |
| 50+ | 34 | 0.3% | 36 | 0.9% | |
Abbreviations: ASA, American Society of Anesthesiologists; COPD, chronic obstructive pulmonary disease; MCCI, modified comprehensive complication index.
Note: P values are provided where applicable.