Table 1.
Demographics of study patients. SSI: surgical site infection.
| Patient Characteristics | SSI (N = 434) | No Complication (N = 8751) | P value |
|---|---|---|---|
| Age at time of surgery (years), mean (SD) | 56.2 (16.0) | 52.4 (16.7) | < 0.001 |
| Gender, male, n (%) | 220 (50.7) | 4247 (48.5) | 0.41 |
| Race, n (%) American Indian or Alaska Native Asian Black or African American Native Hawaiian or Pacific Islander White Unknown or not reported |
7 (1.6) 3 (0.7) 5 (1.2) 8 (1.8) 398 (91.7) 13 (3.0) |
115 (1.3) 133 (1.5) 111 (1.3) 56 (0.6) 8002 (91.4) 334 (3.8) |
0.75 0.23 1 0.008 0.92 0.46 |
| Ethnicity, Hispanic, n (%) | 36 (8.3) | 888 (10.1) | 0.24 |
| Inpatient or outpatient status, inpatient, n (%) | 321 (74.9) | 3467 (39.6) | < 0.001 |
| Current Procedural Terminology code, n (%) 0 – 29999 (skin / soft tissue) 30000 – 39999 (cardiovascular) 40000 – 49999 (gastrointestinal) 50000 – 59999 (genitourinary) 60000 – 69999 (nervous system) |
38 (8.8) 43 (9.9) 351 (80.9) 2 (0.5) 0 (0) |
1403 (16.0) 850 (9.7) 6434 (73.5) 48 (0.5) 16 (0.2) |
< 0.001 0.96 < 0.001 1 0.76 |
| Comorbidities, n (%) Diabetes mellitus Current smoker within 1 year Dyspnea Dependent functional health status Ventilator dependent History of severe chronic obstructive pulmonary disease Ascites within 30 days prior to surgery Congestive heart failure within 30 days prior to surgery Hypertension requiring medication Acute renal failure Currently requiring or on dialysis |
79 (18.2) 69 (15.9) 30 (6.9) 7 (1.6) 3 (0.7) 15 (3.5) 0 (0) 2 (0.5) 162 (37.3) 0 (0) 5 (1.2) |
1130 (12.9) 1089 (12.4) 453 (5.2) 74 (0.8) 13 (0.1) 186 (2.1) 6 (0.07) 20 (0.2) 2745 (31.4) 10 (0.1) 123 (1.4) |
0.002 0.04 0.14 0.16 0.04 0.09 1 0.64 0.01 1 0.82 |
| Disseminated cancer | 28 (6.5) | 252 (2.9) | < 0.001 |
| Open wound with or without infection | 28 (6.5) | 344 (3.9) | 0.01 |
| Steroid / immunosuppressant use for chronic condition | 50 (11.5) | 553 (6.3) | < 0.001 |
| >10% loss of body weight in the 6 months prior to surgery | 20 (4.6) | 128 (1.5) | < 0.001 |
| Bleeding disorder | 5 (1.2) | 152 (1.7) | 0.47 |