Table 1. Demographic Characteristics of the Study Participants.
| Characteristic | Overall (N = 191) | Postoperative Delirium | P Value | |
|---|---|---|---|---|
| Present (n = 59) | Absent (n = 132) | |||
| Age, mean (SD), y | 56.8 (16.7) | 57.9 (17.0) | 56.4 (16.6) | |
| Women, No. (%) | 110 (57.6) | 33 (55.9) | 77 (58.3) | .75 |
| Race, No. (%) | ||||
| African American | 34 (17.8) | 15 (25.4) | 19 (14.4) | .06 |
| White | 149 (78.0) | 41 (69.5) | 108 (81.8) | .11 |
| Other | 8 (4.2) | 3 (5.1) | 5 (3.8) | .92 |
| Ethnicity, No. (%) | ||||
| Hispanic | 2 (1.0) | 2 (3.4) | 0 | .03 |
| Non-Hispanic | 183 (95.8) | 55 (93.2) | 128 (97.0) | .66 |
| Unknown/chose not to answer | 6 (3.1) | 2 (3.4) | 4 (3.0) | .87 |
| Preoperative cognitive impairment, No. (%) | 54 (28.3) | 27 (45.8) | 27 (20.5) | <.001 |
| Duration of anesthesia, min | Median (range), 258 (30-635) | Mean (SD), 285 (144) | Mean (SD), 256 (133) | .18 |
| Preoperative ASA score, mean (SD) | 2.7 (0.6) | 2.8 (0.6) | 2.7(0.6) | .29 |
Abbreviations: ASA, American Society of Anesthesiologists Physical Status Classification System.