Table 1:
Baseline population characteristics for surgery patients in the Indiana University Health system from 2014–2019
| Entire Sample N=39,665 |
Postoperative Delirium N=3,327 |
No Postoperative Delirium N=36,338 |
P-value | |
|---|---|---|---|---|
| Age, median (IQR) | 66 (59,73) | 71 (62,79) | 66 (59,73) | <0.0001 |
| Sex, N (%) | <0.0001 | |||
| Male | 18,967 (47.8) | 1,737 (52.2) | 17,230 (47.4) | |
| Female | 20,698 (52.2) | 1,590 (47.8) | 19,108 (52.6) | |
| Race, N (%) | <0.0001 | |||
| American Indian, Alaska Native, Native Hawaiian, or other Pacific Islander | 92 (0.23) | 5 (0.15) | 87 (0.24) | |
| Asian | 273 (0.69) | 22 (0.66) | 251 (0.69) | |
| Black or African American | 3,831 (9.66) | 392 (11.8) | 3,439 (9.46) | |
| White or Caucasian | 35,098 (88.5) | 2,857 (85.8) | 32,241 (88.73) | |
| Unknown | 371 (0.93) | 51 (1.53) | 320 (0.88) | |
| Ethnicity, N (%) | <0.0001 | |||
| Hispanic or Latino | 472 (1.19) | 31 (0.93) | 441 (1.21) | |
| Not Hispanic or Latino | 38,791 (97.8) | 3,223 (96.9) | 35,568 (97.9) | |
| Unknown | 402 (1.01) | 73 (2.19) | 329 (0.91) | |
| Mild cognitive impairment | 100 (0.25) | 29 (0.87) | 71 (0.20) | <0.0001 |
| Charlson Index, N (%) | <0.0001 | |||
| No comorbid disease | 18,350 (46.3) | 1,316 (39.5) | 17,034 (46.9) | |
| Mild comorbid disease | 11,694 (29.5) | 846 (25.4) | 10,848 (29.8) | |
| Moderate comorbid disease | 4,717 (11.9) | 481 (14.5) | 4,236 (11.7) | |
| Severe comorbid disease | 4,904 (12.3) | 684 (20.6) | 4,220 (11.6) | |
| ASA, N (%) | <0.0001 | |||
| 1–2 | 6,385 (16.1) | 102 (3.07) | 6,283 (17.3) | |
| 3–4 | 29,124 (73.4) | 2,324 (69.9) | 26,800 (73.8) | |
| Emergent (5 or ‘E’) | 4,156 (10.5) | 901 (27.1) | 3,255 (8.96) | |
| Encounter Specialty | <0.0001 | |||
| CT | 3,191 (8.04) | 387 (11.6) | 2,804 (7.72) | |
| ENT | 741 (1.87) | 55 (1.65) | 686 (1.89) | |
| General | 12,285 (31.0) | 1,040 (31.3) | 11,245 (30.9) | |
| Multiple* | 1,950 (4.92) | 206 (6.19) | 1,744 (4.80) | |
| Neurosurgery | 3,784 (9.54) | 314 (9.44) | 3,470 (9.55) | |
| Orthopedic | 11,503 (29.0) | 826 (24.8) | 10,677 (29.4) | |
| Plastic | 253 (0.66) | 23 (0.69) | 240 (0.66) | |
| Urology/Gynecology | 2,926 (7.38) | 97 (2.92) | 2,829 (7.79) | |
| Vascular | 3,022 (7.62) | 379 (11.4) | 2,643 (7.27) | |
| Complex Case | 1,324 (3.34) | 337 (10.1) | 987 (2.72) | <0.0001 |
| Insurance Type | <0.0001 | |||
| Private | 12,093 (30.4) | 526 (15.8) | 11,513 (31.7) | |
| Public | 27,176 (68.5) | 2,756 (82.8) | 24,420 (67.2) | |
| Uninsured | 450 (1.13) | 45 (1.35) | 405 (1.11) |
*
Multiple refers to cases wherein procedure codes were attributed to > 2 surgical specialties
Abbreviations: IQR, interquartile range; ASA, American Society of Anesthesiologists physical classification score; CT, cardiothoracic; ENT, otolaryngology.