Table 2.
Patient characteristics by cognitive status on the first postoperative day.
| SSD & Delirium- free n = 264 |
SSD n = 172 |
Delirium n = 195 |
P Value | |
|---|---|---|---|---|
| Mean Age* (SD) | 72.4 (5.9) | 73.7 (5.8) | 74.6 (6.3) | <.001 |
| Gender (Male %)* | 158 (60%) | 82 (48%) | 74 (38%) | <.001 |
| Race (White %) | 233 (88%) | 155 (91%) | 161 (83%) | .055 |
| Charlson Score (SD) | 1.5 (1.8) | 1.5 (1.7) | 1.5 (1.7) | .865 |
| CNS disorders (Yes %)* | 121 (46 %) | 88 (51%) | 114 (58%) | .028 |
| Baseline Cognitive Status (SD) * | 33.3 (3.3) | 32.2 (4.1) | 31.0 (4.5) | <.001 |
| Preoperative use of Narcotics (%) | 66 (25%) | 58 (34%) | 69 (35%) | .031 |
| Preoperative use of benzodiazepine (%) | 31 (12%) | 28 (17%) | 28 (15%) | .459 |
| Surgery duration* (SD) | 4.50 (1.75) | 5.00 (2.76) | 5.30 (3.35) | .012 |
| Baseline Preoperative Functional Status* | ||||
| ADL (% Yes) | 56 (21%) | 55 (32%) | 70 (36%) | .001 |
| IADL (% Yes) | 91 (35%) | 76 (44%) | 95 (49%) | .006 |
| Type of Surgery* | ||||
| Orthopedic/spine | 117 (52%) | 75 (49%) | 113 (62%) | .038 |
| Type of Anesthesia* | ||||
| General (compared to Regional) | 183 (69%) | 125 (73%) | 137 (70%) | .784 |
Percentages calculated by conditioning on cognitive status (column %). P values calculated by ANOVA (Age, Charlson Score, surgery duration) or Chi Squared (Gender, Race, CNS Disorders, Preoperative use of narcotics, Preoperative use of benzodiazepine, Baseline ADL, Baseline IADL, Type of Surgery, Type of Anesthesia) tests.
ADL = activities of daily living, CNS = central nervous system disorder, IADL = instrumental activities of daily living, SD = standard deviation