TABLE 1.
Subject characteristics.
| POD group (n = 10) | Non-POD group (n = 30) | Statistical test | P-value | |
| Age (years), mean ± SD | 82.2 ± 7.6 | 81.7 ± 7.2 | t = 0.188 | 0.852 |
| MMSE score, mean ± SD | 25.2 ± 3.9 | 25.4 ± 3.6 | t = -0.174 | 0.863 |
| Male, n (%) | 5 (50.0) | 7 (23.3) | χ2 = 1.429 | 0.232 |
| Height (cm), mean ± SD | 165.0 ± 7.9 | 163.2 ± 9.4 | t = 0.516 | 0.609 |
| Weight (kg), mean ± SD | 66.1 ± 14.2 | 63.1 ± 10.5 | t = 0.647 | 0.522 |
| BMI (kg/m2), mean ± SD | 24.6 ± 5.4 | 23.3 ± 3.0 | t = 0.846 | 0.404 |
| ASA class, n (%) | χ2 = 0.342 | 0.559 | ||
| II | 8 (80.0) | 19 (63.3) | ||
| III | 2 (20.0) | 11 (36.7) | ||
| Education (years), median (IRQ) | 13.5 (7.8) | 9.0 (9.8) | z = -0.793 | 0.428 |
| Length of anesthesia (min), mean ± SD | 91.9 ± 12.5 | 93.8 ± 30.7 | t = -0.171 | 0.865 |
| Length of surgery (min), mean ± SD | 63.8 ± 11.6 | 75.8 ± 33.4 | t = -0.994 | 0.328 |
| Charlson comorbidity score, mean ± SD | 5.9 ± 1.0 | 6.3 ± 1.7 | t = -0.671 | 0.506 |
| Preoperative VAS score, mean ± SD | 3.6 ± 1.0 | 3.2 ± 0.9 | t = 0.786 | 0.441 |
POD, postoperative delirium; MMSE, Mini-Mental State Examination; ASA, American Society of Anesthesiologists; IQR, interquartile range; VAS, Visual Analogue Scale; cm, centimeter; kg, kilogram; min, minute; SD, standard deviation.