Table 2.
Comparisons of Patient Preoperative Laboratory Parameters between Patients with and without Postoperative Delirium.
| Laboratory parameter | Total
(n=106) |
With delirium
(n=12) |
Without delirium
(n=94) |
P value |
|---|---|---|---|---|
| White blood cell (103/L) | 5.8±1.8 | 6.2±1.8 | 5.8±1.8 | 0.498 |
| Red blood cell (103/L) | 407.2±62.4 | 377.0±63.4 | 411.1±61.6 | 0.075 |
| Hemoglobin (g/dL) | 12.9±1.9 | 11.7±1.9 | 13.0±1.9 | 0.025 |
| Platelet (×104/mm3) | 20.9±8.5 | 18.1±4.9 | 21.3±8.8 | 0.228 |
| Total protein (g/dL) | 7.0±0.5 | 7.0±0.8 | 7.0±0.5 | 0.759 |
| Albumin (g/dL) | 4.3±0.5 | 4.0±0.7 | 4.3±0.5 | 0.023 |
| AST (U/L) | 23.8±11.4 | 19.0±6.8 | 23.9±11.3 | 0.086 |
| ALT (U/L) | 21.1±12.7 | 16.3±6.4 | 21.3±12.9 | 0.121 |
| Blood urea nitrogen (mg/dL) | 21.4±10.3 | 30.0±17.4 | 20.4±8.5 | 0.002 |
| Creatine (mg/dL) | 1.6±1.9 | 2.7±3.0 | 1.4±1.7 | 0.032 |
| eGFR | 58.6±28.6 | 46.4±38.3 | 60.1±27.0 | 0.118 |
| Sodium | 141.2±2.6 | 140.8±2.1 | 141.3±2.7 | 0.561 |
| Potassium | 4.3±0.5 | 4.1±0.8 | 4.3±0.5 | 0.321 |
| Chlorine | 104.8±3.1 | 104.8±4.0 | 104.8±3.0 | 0.999 |
| C-reactive protein (mg/dL) | 0.4±1.3 | 1.4±3.5 | 0.3±0.7 | 0.010 |
Data are shown as mean±standard deviation, number (%), or median (interquartile range). *P values were calculated using unpaired t-test for means, Fischer’s exact test for proportions, or Wilcoxon signed-rank test for medians. AST, aspartate transaminase; ALT, alanine aminotransferase; eGFR, estimated glomerular filtration rate