Table 2.
Intraoperative cerebral oximetry parameters.
| Non-AKI (n = 437, 75.3%) |
AKI (n = 143, 24.7%) |
p-Value | AUC | |
|---|---|---|---|---|
| rScO2 data | ||||
| Baseline rScO2, % | 61 ± 8 | 58 ± 9 | <0.001 | 0.593 |
| Mean rScO2, % | 59 (54–64) | 55 (50–61) | <0.001 | 0.636 |
| Lowest rScO2, % | 46 (40–52) | 42 (36–49) | <0.001 | 0.618 |
| Maximal percent decrease of rScO2 from baseline, % | 24 (18–32) | 27 (19–36) | 0.029 | 0.561 |
| AUT50, 10 min% | 0.7 (0–26.8) | 14.7 (0.1–71.4) | <0.001 | 0.620 |
| AUT80%base, 10 min% | 1.3 (0–22.4) | 2.7 (0.1–31.1) | 0.116 | 0.543 |
| rScO2 < 50%, n | 281 (64.3%) | 111 (77.6%) | 0.003 | 0.567 |
| rScO2 < 80%base, n | 286 (65.5%) | 106 (74.1%) | 0.054 | 0.543 |
Values are presented as mean ± SD, median (interquartile range), or number of patients (%). p-values obtained when comparing the AKI group to the non-AKI group. AKI: acute kidney injury; AUC: area under the ROC curve; rScO2: cerebral regional oxygen saturation; AUT50: area under the threshold below an absolute value of 50% of rScO2; AUT80%base: area under the threshold below 80% of baseline rScO2; 80%base: 80% of baseline rScO2 value.