Table 2.
Impact of expert surgeon participation on OS hepatectomy before and after propensity score matching
| Characteristic | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
| Participation (n = 98) | Non-participation (n = 51) | P value | Participation (n = 48) | Non-participation (n = 48) | P value | |
| Profiles | ||||||
| Age, years, mean | 66.9 | 65.0 | 0.103 | 66.3 | 65.2 | 0.354 |
| Male sex, % | 76.5 | 74.5 | 0.841 | 68.8 | 72.9 | 0.823 |
| PS 0, % | 100 | 100 | NS | 100 | 100 | NS |
| BMI, mean | 23.7 | 24.0 | 0.533 | 23.2 | 23.8 | 0.278 |
| Comorbidity | ||||||
| Alcohol habitually, % | 24.5 | 21.6 | 0.839 | 25.0 | 20.8 | 0.809 |
| Smoking, % | 54.1 | 37.3 | 0.059 | 52.1 | 37.5 | 0.218 |
| Liver cirrhosis, % | 31.6 | 27.5 | 0.708 | 37.5 | 29.2 | 0.516 |
| Esophageal varices, % | 17.3 | 13.7 | 0.644 | 22.9 | 14.6 | 0.433 |
| Preoperative laboratory factors | ||||||
| HBsAg + , % | 15.3 | 19.6 | 0.408 | 20.8 | 18.8 | 1.000 |
| HCVAb + , % | 51.0 | 49.0 | 0.864 | 52.1 | 52.1 | 1.000 |
| Hemoglobin, g/dL, mean | 13.5 | 13.6 | 0.857 | 13.5 | 13.5 | 0.997 |
| Platelets, 104/μL, mean | 15.8 | 16.7 | 0.596 | 15.3 | 16.6 | 0.466 |
| Albumin, g/dL, mean | 4.1 | 4.0 | 0.379 | 4.1 | 4.1 | 0.974 |
| Bilirubin, mg/dL, mean | 0.66 | 0.71 | 0.307 | 0.65 | 0.72 | 0.206 |
| AST, IU/L, mean | 43.6 | 46.4 | 0.252 | 47.4 | 46.6 | 0.809 |
| Prothrombin, %, mean | 94.4 | 95.7 | 0.671 | 95.0 | 95.5 | 0.558 |
| ICG-R15, %, mean | 13.6 | 14.3 | 0.573 | 14.5 | 14.5 | 0.590 |
| Child–Pugh, A, % | 98.0 | 100 | 0.547 | 100 | 100 | NS |
| Surgical factors | ||||||
| Surgical time, minutes, mean | 348.3 | 350.5 | 0.986 | 341.5 | 350.6 | 0.977 |
| Pringle’s time, minutes, mean | 78.3 | 89.8 | 0.202 | 78.1 | 88.9 | 0.416 |
| Blood loss, mL, mean | 325.7 | 464.9 | 0.033 | 340.1 | 473.1 | 0.033 |
| Blood transfusion, mL, mean | 25.7 | 60.4 | 0.398 | 25.7 | 60.4 | 0.979 |
| Tumor-related factors | ||||||
| Tumor number, single, % | 82.7 | 82.4 | 1.000 | 81.3 | 83.3 | 1.000 |
| Tumor size, cm, mean | 3.3 | 3.2 | 0.599 | 3.3 | 3.0 | 0.600 |
| Surgical margin, mm, mean | 6.3 | 6.4 | 0.965 | 5.0 | 6.5 | 0.534 |
| Complications, n (%) | 40 (40.8) | 17 (33.3) | 0.478 | 21 (43.8) | 17 (35.4) | 0.532 |
| Clavien–Dindo grade | 1.000 | 1.000 | ||||
| Grade I–IIIa, % | 93.9 | 94.1 | 93.8 | 93.8 | ||
| Grade IIIb–V, % | 6.1 | 5.9 | 6.3 | 6.3 | ||
| Morbidity and mortality | ||||||
| 30-day mortality, % | 1.0 | 0 | 1.000 | 0 | 0 | NS |
| Surgical mortality, % | 0 | 2.0 | 0.342 | 0 | 1.0 | 1.000 |
| Hospital stay, days, mean | 14.3 | 14.0 | 0.163 | 14.5 | 14.3 | 0.382 |
OS hepatectomy; hepatic segmentectomy so-called one-segment hepatectomy; PS performance status, BMI body mass index, HBsAg hepatitis B surface antigen, HCVAb hepatitis C virus antibody, AST Aspartate transaminase; ICG-R15 indocyanine green retention rate at 15 min, DCP des-gamma-carboxyprothrombin, NS not significant