Table 3: Candidate laboratory markers of dehydration.
| Patient data | Clinically euvolemic (no 51) | Likely dehydrated (no 13) |
| Serum sodium mEq/L | 137.2 (SD 3.2) | 137.7 (SD 2.2) |
| Serum ureamg/Dl | 53.8 (SD27) | 54.5 (SD 18.9) |
| Serum creatinine mg/Dl | 0.75 (SD 0.5) | 0.73 (SD 0.28) |
| Serum urea creatinine ratio | 79.3 (SD 35) | 81 (SD 32/9) |
| Serum urea creatinine ratio > 49% of patients | 82 | 89 |
| eGFR*mL/min/1.73 m2 | 92.1 (SD 28.9) | 89 (SD 24.7) |
| Serum albumin g/Dl | 3.2 (SD 0.4) | 3.07 (SD 0.4) |
| Blood hemoglobin g/Dl | 11.3 (SD 1.4) | 10 (SD 1.7) |
| Hemoglobin recent increase** number of patients | 2 | 2 |
*eFGR by CKD-EPI formula; **Hemoglobin increase by > 1 g/Dl intergroup differences are not significant at p < 0.05.