Table 2. Admitted Patient Perioperative Factors.
| Perioperative factorb | Admissions, No. (%) | P valuea | |||
|---|---|---|---|---|---|
| Appropriate triage (n = 11 042) | Undertriage (n = 1306) | Control (n = 2452) | Appropriate triage vs undertriage | Undertriage vs control | |
| Planned postoperative destination | |||||
| ICU, intensive status | 284 (2.6) | 91 (7.0) | 1570 (64.0) | <.001 | <.001 |
| ICU, intermediate status | 66 (0.6) | 19 (1.5) | 237 (9.7) | .002 | <.001 |
| Postanesthesia care unit and ward | 10 665 (96.6) | 1173 (89.8) | 630 (25.7) | <.001 | <.001 |
| Unknown | 27 (0.2) | 23 (1.8) | 15 (0.6) | <.001 | .002 |
| Immediate postoperative vital signs, median (IQR)c | |||||
| Heart rate, bpm | 79.8 (71.2-89.0) | 82.1 (72.2-91.4) | 80.5 (70.2-91.2) | <.001 | .01 |
| Blood pressure, mm Hg | |||||
| Systolic | 126.1 (114.5-138.0) | 124.3 (111.0-138.9) | 131.0 (116.4-145.4) | <.001 | <.001 |
| Diastolic | 70.3 (62.8-78.0) | 66.4 (58.2-74.8) | 67.0 (58.2-76.5) | <.001 | .23 |
| Respiratory rate, breaths per minute | 16.0 (14.6-17.6) | 16.2 (14.3-17.9) | 16.4 (14.5-18.6) | .31 | <.001 |
| Oxygen saturation, % | 96.0 (94.5-97.5) | 95.9 (94.4-97.6) | 96.2 (94.8-97.8) | .28 | <.001 |
| Temperature, °C | 37.2 (37.1-37.4) | 37.3 (37.1-37.5) | 37.2 (37.0-37.5) | .07 | <.001 |
| GCS eye opening response | |||||
| Median (IQR) | 4.0 (4.0-4.0) | 4.0 (4.0-4.0) | 4.0 (4.0-4.0) | .42 | <.001 |
| <4 | 1058 (9.6) | 133 (10.2) | 398 (16.2) | .49 | <.001 |
| Surveillance during ward admission | |||||
| Continuous pulse oximetry | 9408 (85.2) | 1094 (83.8) | NA | .74 | NA |
| Cardiac telemetry | 460 (4.2) | 225 (17.2) | NA | <.001 | NA |
| DNR order status | |||||
| Ordered before first surgical procedure | 55 (0.5) | 53 (4.1) | 27 (1.1) | <.001 | <.001 |
| Ordered during admission | 78 (0.7) | 91 (7.0) | 59 (2.4) | <.001 | <.001 |
| Canceled during admission | 6 (0.1) | 18 (1.4) | 15 (0.6) | <.001 | .03 |
Abbreviations: bpm, beats per minute; DNR, do not resuscitate; GCS, Glasgow coma scale; ICU, intensive care unit; NA, not applicable.
a
P values are from significance tests comparing appropriate triage, undertriage, and control groups by each perioperative factor.
b
Postoperative variables, including postoperative vital signs, were not included as features in the estimation models used for cohort derivation.
c
Within 4 hours after surgical procedure end time.