Table 2.
Operative factors before and after propensity score matching among the patients in the study
| Entire cohort | Propensity-matched cohort | |||||
|---|---|---|---|---|---|---|
| HS + LPMOD (n = 98) | LPMOD (n = 47) | P value | HS + LPMOD (n = 47) | LPMOD (n = 47) | P value | |
| Hemihepatectomy | 0.58 | 0.68 | ||||
| Left (%) | 59 (60.2) | 21 (44.7) | 28 (59.6) | 26 (55.3) | ||
| Right (%) | 39 (39.8) | 21 (55.3) | 19 (40.4) | 21 (44.7) | ||
| Blood loss, mL (SD) | 158.5 (124.2) | 221.5 (176.3) | <0.01** | 169.4 (133.5) | 221.5 (176.3) | 0.03* |
| Blood transfusion, n (%) | 26 (26.5) | 13 (27.7) | 0.72 | 14 (29.8) | 13 (27.7) | 0.82 |
| Operative time, minutes (SD) | 202.4 (47.5) | 265.7 (67.1) | <0.01** | 210.5 (56.1) | 265.7 (67.1) | 0.02* |
| Conversion to laparotomy, n (%) | 5 (5.1) | 3 (6.4) | 0.75 | 4 (8.5) | 3 (6.4) | 0.69 |
| Postoperative hospital stay, days (SD) | 14.1 (9.4) | 13.7 (9.4) | 0.80 | 14.0 (8.7) | 13.7 (9.4) | 0.83 |
| Hospital mortality, n (%) | 0 | 0 | – | 0 | 0 | – |
| Resection margin$ | 0.97 | 1.00 | ||||
| R0 (%) | 96 (98.0) | 46 (97.9) | 46 (97.9) | 46 (97.9) | ||
| R1 (%) | 2 (2.0) | 1 (2.1) | 1 (2.1) | 1 (2.1) | ||
| R2 | 0 | 0 | 0 | 0 | ||
Abbreviations: HS harmonic scalpel, LPMOD laparoscopic Peng’s multifunction operative dissector, SD standard deviation
$ Resection margin: R0: no microscopically identifiable tumor remnants, R1: microscopically identifiable tumor remnants R2: macroscopically identifiable tumor remnants
*P<0.05; **P<0.01 between two groups