Table 1.
Baseline characteristics and postoperative delirium (univariate analysis)
| Postoperative Delirium Status | ||||
|---|---|---|---|---|
| Total n = 715 (%) | Yes n = 127 (17.8) | No n = 588 (82.2) | P-value | |
| Preoperative variables | ||||
| Age, years, mean ± SD | 73.6 ± 6.0 | 75.0 ± 6.6 | 73.3 ± 5.9 | 0.0051 |
| Male, n (%) | 351 (49.1) | 60 (47.2) | 292 (49.5) | 0.6462 |
| Baseline living situation, n (%), n = 648 | ||||
| Independent | 619 (95.5) | 115 (92.0) | 504 (96.4) | |
| Nursing home/ Facility | 29 (4.5) | 10 (8.0) | 19 (3.6) | 0.0342 |
| Marital status, n (%), n = 705 | ||||
| Married / Partner | 490 (69.5) | 85 (68.0) | 405 (69.8) | |
| Other | 215 (30.5) | 40 (32.0) | 175 (30.2) | 0.6872 |
| Body mass index, Kg/m2, mean ± SD, n = 706 | 29.0 (5.5) | 29.2 (6.1) | 28.9 (5.4) | 0.5911 |
| ASA physical status, n (%) | ||||
| < 3 | 243 (34.0) | 18 (14.2) | 225 (38.3) | |
| ≥ 3 | 472 (66.0) | 109 (85.8) | 363 (61.7) | <0.0012 |
| Metabolic Equivalents of Task, n (%), n = 612 | ||||
| < 4 | 169 (27.6) | 44 (46.8) | 125 (24.1) | |
| ≥ 4 | 443 (72.4) | 50 (53.2) | 393 (75.9) | <0.0012 |
| Depression, n (%), n = 701 | ||||
| No | 461 (65.8) | 61 (49.6) | 400 (69.2) | |
| Yes | 240 (34.2) | 62 (50.4) | 178 (30.8) | <0.0012 |
| Anxiety, n (%), n = 703 | ||||
| No | 512 (72.8) | 78 (63.4) | 434 (74.8) | |
| Yes | 191 (27.2) | 45 (36.6) | 146 (25.2) | 0.0102 |
| Total number of medications median [25th-75th], n = 712 | 7 [5–11] | 8 [6–12] | 7 [5–11] | 0.0023 |
| Preoperative opioid use, n (%), n = 712 | ||||
| No | 449 (63.1) | 65 (51.6) | 384 (65.5) | |
| Yes | 263 (36.9) | 61 (48.4) | 202 (34.5) | 0.0032 |
| Number of past previous surgeries median [25th-75th], n = 664 | 4 [2–6] | 4 [2–7] | 4 [2–6] | 0.2753 |
| Case classification, n (%), n = 710 | ||||
| Elective | 655 (92.3) | 98 (79.0) | 557 (95.1) | |
| Non-elective | 55 (7.8) | 26 (21.0) | 29 (5.0) | <0.0012 |
SD: standard deviation, ASA: American Society of Anesthesiologists physical status
1
T-tests were used.
2
Chi-square tests were used
3
Wilcoxon rank sum tests were used
4
Fisher’s exact tests were used