Table 5.
Descriptive and Comparative Distribution of Postoperative Variables, Propensity Score Matched Patient Population
| Total | OSD | No OSD | Standardized difference, % | |
|---|---|---|---|---|
| Overall, n (%) | 1,868 | 934 (50.0) | 934 (50.0) | |
| Length of stay, d ±SD | 6.5 ± 6.4 | 7.0 ± 6.3 | 6.1 ± 6.5 | 14.2* |
| Pathology, n (%) | ||||
| Primary hepatobiliary cancer | 489 (26.2) | 286 (30.6) | 203 (21.7) | 20.3* |
| Metastatic tumor | 980 (52.5) | 449 (48.1) | 531 (56.9) | 17.6* |
| Benign lesion | 333 (17.8) | 180 (19.3) | 153 (16.4) | 7.6 |
| Other/unknown | 66 (3.5) | 19 (2.0) | 47 (5.0) | 16.3* |
| Wound complications, n (%) | ||||
| Superficial | 61 (3.3) | 35 (3.7) | 26 (2.8) | 5.4 |
| Deep incisional | 12 (0.6) | 8 (0.9) | 4 (0.4) | 5.4 |
| Organ space | 106 (5.7) | 64 (6.9) | 42 (4.5) | 10.2* |
| Disruption, dehiscence | 14 (0.7) | 6 (0.6) | 8 (0.9) | 2.5 |
| Other infectious complications, n (%) | ||||
| Sepsis, septic shock | 93 (5.0) | 55 (5.9) | 38 (4.1) | 8.4 |
| Pneumonia | 66 (3.5) | 27 (2.9) | 39 (4.2) | 7.0 |
| Urinary tract infection | 48 (2.6) | 26 (2.8) | 22 (2.4) | 2.7 |
| Other outcomes, n (%) | ||||
| Post-hepatectomy liver failure | 78 (4.2) | 38 (4.1) | 40 (4.3) | 1.1 |
| Myocardial infarction | 13 (0.7) | 6 (0.6) | 7 (0.7) | 1.3 |
| Stroke | 7 (0.4) | 3 (0.3) | 4 (0.4) | 1.8 |
| DVT and/or PE | 54 (2.9) | 31 (3.3) | 23 (2.5) | 5.1 |
| Any reoperation | 49 (2.6) | 21 (2.2) | 28 (3.0) | 8.4 |
| Mortality | 25 (1.3) | 8 (0.9) | 17 (1.8) | 8.4 |
| Unplanned readmission | 181 (9.7) | 111 (11.9) | 70 (7.5) | 14.9* |
*
Absolute standardized differences for variables with imbalance (≥10%) between groups.
OSD, operative site drainage; DVT, deep venous thrombosis; PE, pulmonary embolism.