Table 1.
Preoperative characteristics and surgical procedure category for intraabdominal surgery patients, by 30-day mortality status.
| Total | Died | Alive | ||
|---|---|---|---|---|
| Variable | 4322 | 62 (1.4%) | 4260 (99%) | P-Value |
| Age (years) | 53 (18) | 72 (14) | 53 (18) | <0.0001 |
| Female | 2517 (58%) | 39 (63%) | 2478 (58%) | 0.5 |
| Race | 0.3 | |||
| White | 1882 (44%) | 23 (37%) | 1859 (44%) | |
| Hispanic | 1358 (31%) | 20 (32%) | 1338 (31%) | |
| Black | 495 (11%) | 11 (18%) | 484 (11%) | |
| Other | 481 (11%) | 8 (13%) | 473 (11%) | |
| Asian | 106 (2%) | 0 (0.0%) | 106 (2.5%) | |
| Emergency | 1130 (26%) | 36 (58%) | 1094 (26%) | <0.0001 |
| Body Mass Index (kg/m2) | 31 (9.9) | 28 (8.1) | 31 (9.9) | 0.03 |
| Diabetes | 759 (18%) | 21 (34%) | 738 (17%) | 0.001 |
| Hypertension | 1872 (43%) | 51 (82%) | 1821 (43%) | <0.0001 |
| Chronic Obstructive Pulmonary Disease | 70 (1.6%) | 7 (11%) | 63 (1.5%) | <0.0001 |
| Current Smoker | 565 (13%) | 12 (19%) | 553 (13%) | 0.2 |
| Dyspnea | 374 (8.7%) | 16 (26%) | 358 (8.4%) | <0.0001 |
| Mechanical Ventilation | 36 (0.8%) | 17 (27%) | 19 (0.4%) | <0.0001 |
| Functionally Dependent | 188 (4.3%) | 31 (50%) | 157 (3.7%) | <0.0001 |
| Ascites | 31 (0.7%) | 6 (10%) | 25 (0.6%) | <0.0001 |
| Estimated Glomerular Filtration Rate (mL/min/1.73 m2) | 87 (30) | 63 (47) | 87 (29) | <0.0001 |
| Preoperative Transfusion | 28 (0.6%) | 7 (11%) | 21 (0.5%) | <0.0001 |
| Bleeding Disorder | 28 (0.6%) | 7 (11%) | 21 (0.5%) | <0.0001 |
| Preoperative Steroid | 28 (0.6%) | 7 (11%) | 21 (0.5%) | <0.0001 |
| Disseminated Cancer | 122 (2.8%) | 9 (15%) | 113 (2.7%) | <0.0001 |
| Wound Infection | 28 (0.6%) | 7 (11%) | 21 (0.5%) | <0.0001 |
| Preoperative Renal Insufficiency/Dialysis | 28 (0.6%) | 7 (11%) | 21 (0.5%) | <0.0001 |
| Preoperative Sepsis/Septic Shock | 252 (5.8%) | 23 (37%) | 229 (5.4%) | <0.0001 |
| Albumin (g/dL) | 4.1 (0.6) | 3.1 (0.8) | 4.1 (0.6) | <0.0001 |
| Alkaline Phosphatase (U/L) | 99 (92) | 126 (126) | 98 (92) | 0.01 |
| Bilirubin (mg/dL) | 0.9 (1.5) | 1.2 (1.0) | 0.9 (1.5) | 0.07 |
| Blood Urea Nitrogen (mg/dL) | 16 (9.3) | 29 (21) | 16 (8.9) | <0.0001 |
| Hematocrit (%) | 39 (5.2) | 33 (7.0) | 39 (5.1) | <0.0001 |
| International Normalized Ratio (Unitless) | 1.1 (0.2) | 1.4 (0.5) | 1.1 (0.2) | <0.0001 |
| Platelets (103/μL) | 266 (94) | 248 (135) | 266 (94) | 0.12 |
| Partial Thromboplastin Time (sec) | 31 (6.5) | 36 (13) | 31 (6.3) | <0.0001 |
| Aspartate Aminotransferase (U/L) | 35 (108) | 169 (747) | 33 (56) | <0.0001 |
| Sodium (mmol/L) | 138 (2.9) | 137 (4.5) | 138 (2.9) | 0.004 |
| White Blood Cells (103/μL) | 9.0 (4.3) | 13 (8.4) | 9.0 (4.2) | <0.0001 |
| Procedure Category | <0.0001 | |||
| Colorectal resection | 469 (11%) | 20 (32%) | 449 (11%) | |
| Exploratory laparotomy | 129 (3.0%) | 16 (26%) | 113 (3%) | |
| Ileostomy and other enterostomy | 450 (10%) | 8 (13%) | 442 (10%) | |
| Other operating room gastrointestinal therapeutic procedures | 449 (10%) | 7 (11%) | 442 (10%) | |
| Small bowel resection | 129 (3.0%) | 3 (4.8%) | 126 (3.0%) | |
| Excision, lysis peritoneal adhesions | 57 (1.3%) | 2 (3.2%) | 55 (1.3%) | |
| Other operating room lower gastrointestinal therapeutic procedures | 166 (3.8%) | 2 (3.2%) | 164 (3.8%) | |
| Cholecystectomy and common duct exploration | 572 (13%) | 2 (3.2%) | 570 (13%) | |
| Appendectomy | 615 (14%) | 1 (1.6%) | 614 (14%) | |
| Gastric bypass and volume reduction | 813 (19%) | 1 (1.6%) | 812 (19%) | |
| Procedures on spleen | 26 (0.6%) | 0 (0.0%) | 26 (0.6%) | |
| Colostomy, temporary and permanent | 18 (0.4%) | 0 (0.0%) | 18 (0.4%) | |
| Gastrectomy, partial and total | 77 (1.8%) | 0 (0.0%) | 77 (1.8%) | |
| Other hernia repair | 352 (8.1%) | 0 (0.0%) | 352 (8.3%) |
For continuous variables, the mean and (standard deviation) are displayed for each group and compared with the t-test. For categorical variables, counts and (%) are displayed for each group and compared with the chi-square test.