TABLE 1.
Characteristics of Elective Surgical Cases 2014–2019
| Primary Cohort* (2014–2019) 162,202 | Secondary Cohort† (2017–2019) 308,525 | P-value | |
|---|---|---|---|
|
| |||
| Female, No. (%) | 93,516 (57.7%) | 174,056 (56.4%) | < 0.001 |
| Age, mean (SD), yr | 57.4 (16.2) | 54.9 (16.8) | < 0.001 |
| Body Mass Index, mean (SD), kg/m2 | 29.2 (6.5) | 29.1 (6.5) | < 0.001 |
| Abbreviated Laboratory-based Acute Physiology Score, No. (%) | |||
| Low | 18,617 (11.5%) | 33,928 (11.0%) | < 0.001 |
| Medium | 12,068 (7.4%) | 20,250 (6.6%) | |
| High | 10,557 (6.5%) | 20,154 (6.5%) | |
| Unavailable | 120,960 (74.6%) | 234,193 (75.9%) | |
| Comorbidity Points Score, Version 2, mean (SD) | 20.5 (24.0) | 21.4 (26.9) | < 0.001 |
| Patient Class, No. (%) | |||
| Inpatient | 59,066 (36.4%) | 45,703 (14.8%) | < 0.001 |
| Outpatient | 103,136 (63.6%) | 262,822 (85.2%) | |
| Case Class, No. (%) | |||
| Cancer | 24,862 (15.3%) | 30,451 (9.9%) | < 0.001 |
| Elective | 125,702 (77.5%) | 250,023 (81.0%) | |
| Other | 11,638 (7.2%) | 28,051 (9.1%) | |
| Service Category, No. (%) | |||
| Bariatric | 4,565 (2.8%) | 2,154 (0.7%) | < 0.001 |
| General Surgery | 44,075 (27.2%) | 70,550 (22.9%) | |
| Gynecology | 18,075 (11.1%) | 32,017 (10.4%) | |
| Head and Neck | 8,210 (5.1%) | 32,389 (10.5%) | |
| Neurosurgery | 5,332 (3.3%) | 6,157 (2.0%) | |
| Orthopedics | 55,262 (34.1%) | 96,355 (31.2%) | |
| Plastics | 5,610 (3.5%) | 15,190 (4.9%) | |
| Spine | 3,769 (2.3%) | 6,172 (2.0%) | |
| Thoracic | 1,663 (1.0%) | 2,042 (0.7%) | |
| Urology | 11,956 (7.4%) | 35,500 (11.5%) | |
| Vascular | 3,685 (2.3%) | 9,999 (3.2%) | |
| Patient Complexity, No. (%) | |||
| No perioperative medicine appointment required | 3,735 (2.3%) | 6,805 (2.2%) | < 0.001 |
| Relatively Healthy | 97,658 (60.2%) | 220,923 (71.6%) | |
| Relatively Complex | 60,809 (37.5%) | 80,797 (26.2%) | |
| American Society of Anesthesiologists Physical Status Class, No. (%) | |||
| Class 1 | 15,362 (9.5%) | 35,615 (11.5%) | < 0.001 |
| Class 2 | 90,763 (56.0%) | 176,334 (57.2%) | |
| Class 3 | 53,751 (33.1%) | 90,803 (29.4%) | |
| Class 4 | 2,295 (1.4%) | 5,747 (1.9%) | |
| Class 5 | 3 (0.0%) | 5 (0.0%) | |
*
The primary cohort was limited to elective surgical cases reported to the American College of Surgeons National Surgery Quality Improvement Program (NSQIP).
†
The secondary cohort limited to elective surgical cases that were not sampled for reporting to NSQIP.