Table 3.
Bivariate Analysis of the Preoperative Factors Associated with Postoperative Delirium†
| No Delirium (n = 84) | Delirium (n = 16) | P value | |
|---|---|---|---|
| Age (years) | 64.4 ± 7.2 | 66.3 ± 9.7 | 0.449 |
| Education (years) | 13.5 ± 2.6 | 12.8 ± 3.1 | 0.380 |
| Alcohol Use n (% of group) | |||
| No | 45 (54%) | 11 (69%) | 0.262 |
| Yes | 39 (46%) | 5 (31%) | |
| ASA physical status n (% of group) | |||
| II | 20 (24%) | 2 (13%) | 0.366 |
| III | 60 (71%) | 14 (87%) | |
| IV | 4 (5%) | 0 (0%) | |
| BMI | 29.8 ± 4.9 | 28.9 ± 6.7 | 0.623 |
| History of depression n (% of group) | |||
| No | 52 (62%) | 10 (62%) | 1.000 |
| Yes | 32 (38%) | 6 (38%) | |
| Charlson comorbidity index n (% of group) | |||
| 0 | 8 (10%) | 4 (25%) | 0.592 |
| 1 – 2 | 33 (39%) | 5 (31%) | |
| 3 – 4 | 30 (36%) | 5 (31%) | |
| ≥ 5 | 13 (15%) | 2 (13%) | |
| Preoperative Pain Score | 1.9 ± 3.1 | 2.8 ± 3.4 | 0.386 |
| 3 MS | 92.9 ± 4.2 | 89.9 ± 7.2 | 0.124 |
| GDS - 15 | 2.7 ± 2.9 | 5.3 ± 3.5 | 0.011* |
| Digit Symbol Test (number correct) | 48.3 ± 14.9 | 37.1 ± 16.5 | 0.019* |
| Symbol Search Test (number correct) | 22.1 ± 7.8 | 15.9 ± 6.1 | 0.002* |
| Trails B Time (time in seconds) | 119.3 ± 63.8 | 217.8 ± 79.9 | 0.0002* |
†
All data is Mean ± SD unless otherwise indicated;
*
P < 0.05
ASA is American Society of Anesthesiologists
GDS-SF is Geriatric Depression Score – Short Form
3MS is Modified Mini-Mental State
BMI is Body Mass Index