Table 2. Operation details and outcome before and after propensity score matching for CRLM.
| Operation details and outcome | OLR (N=101) | LLR (N=18) | P | PSM OLR (N=18) | PSM LLR (N=18) | P |
|---|---|---|---|---|---|---|
| Bisegmentectomy [n, (%)] | 30 (29.7) | 3 (16.7) | 0.392 | 9 (50.0) | 3 (16.7) | 0.034 |
| Segmentectomy [n, (%)] | 8 (7.9) | 7 (38.9) | 0.002 | 3 (16.7) | 7 (38.9) | 0.264 |
| Right hepatectomy [n, (%)] | 18 (17.8) | 0 (0.0) | 0.071 | 1 (5.6) | 0 (0.0) | 1 |
| Left hepatectomy [n, (%)] | 11 (10.9) | 2 (11.1) | 1 | 2 (11.1) | 2 (11.1) | 1 |
| Extended right hepatectomy [n, (%)] | 9 (8.9) | 0 (0.0) | 0.352 | 0 (0.0) | 0 (0.0) | 1 |
| Wedge resection [n, (%)] | 26 (25.7) | 6 (33.3) | 0.566 | 3 (16.7) | 6 (33.3) | 0.443 |
| Mixed (hepatectomy with RF) [n, (%)] | 29 (28.7) | 2 (11.1) | 0.151 | 3 (16.7) | 2 (11.1) | 1 |
| Number of resected segments [median, (IQR)] | 2.0 (1.0–4.0) | 1.0 (0.0–1.8) | 0.003 | 2.0 (1.0–2.0) | 1.0 (0.0–1.8) | 0.073 |
| Operative time (min) [median, (IQR)] | 250 [190–330] | 230 [180–302] | 0.005 | 180 [160–242] | 230 [180–302] | 0.224 |
| Pedicle clamping, continuous/intermittente/No (n) | 8/58/35 | 1/9/8 | 0.846 | 2/12/4 | 1/9/8 | 0.446 |
| Clamping time (min) [median, (IQR)] | 21 (0–40) | 17.5 (0.0–33.0) | 0.384 | 35.0 (15.0–40.0) | 17.5 (0.0–33.0) | 0.078 |
| Blood loss (L) [median, (IQR)] | 250 [30–500] | 30 [30–137] | 0.001 | 200 [47–300] | 30 [30–137] | 0.066 |
| Blood transfusion [n, (%)] | 26 (25.7) | 1 (5.6) | 0.070 | 3 (16.7) | 1 (5.6) | 0.603 |
| Hospital stay (days) [median, (IQR)] | 10 (7.0–14.0) | 6.0 (5.3 – 7.8) | 0.002 | 7.5 (6.0–12.0) | 6.0 (5.3–7.8) | 0.282 |
| Surgical margins R0/R1/R2 (n) | 84/16/1 | 17/1/0 | 0.546 | 17/0/1 | 17/1/0 | 1 |
| Conversion rate [n, (%)] | 0 (0) | 1 (5.6) | 1 | 0 (0) | 1 (5.6) | 1 |
| Complications [n, (%)] | ||||||
| Respiratory [n, (%)] | 18 (17.8) | 1 (5.6) | 0.300 | 5 (27.8) | 1 (5.6) | 0.177 |
| Cardio-vascular [n, (%)] | 2 (2.0) | 1 (5.6) | 0.391 | 2 (11.1) | 1 (5.6) | 1 |
| Renal [n, (%)] | 6 (5.9) | 0 (0.0) | 0.589 | 4 (22.2) | 0 (0) | 0.104 |
| Wound infection [n, (%)] | 4 (4.0) | 0 (0.0) | 1 | 1 (5.6) | 0 (0) | 1 |
| Deep collection [n, (%)] | 8 (7.9) | 1 (5.6) | 1 | 1(5.6) | 1 (5.6) | 1 |
| Bleeding [n, (%)] | 1 (1.0) | 0 (0.0) | 1 | 0 (0) | 0 (0) | 1 |
| Liver failure [n, (%)] | 4 (4.0) | 0 (0.0) | 1 | 1 (5.6) | 0 (0) | 1 |
| Ascites [n, (%)] | 2 (2.0) | 0 (0.0) | 1 | 2 (11.1) | 0 (0) | 0.486 |
| Biliary fistula [n, (%)] | 9 (8.9) | 0 (0.0) | 1 | 0 (0) | 0 (0) | 0 |
| Medical complications [n, (%)] | 47 (46.5) | 3 (16.7) | 0.020 | 8 (44.4) | 3 (16.7) | 0.070 |
| Surgical complications [n, (%)] | 2 (2.0) | 0 (0.0) | 1 | 0 (0.0) | 0 (0.0) | 1 |
| Dindo-Clavien classification 1−2/3−4/5 (n) | 31/19/1 | 5/0/0 | 0.119 | 3/3/1 | 5/0/0 | 0.211 |
| Postoperative mortality 30 [n, (%)] | 0 (0.0) | 0 (0.0) | 1 | 0 (0.0) | 0 (0.0) | 1 |
| Postoperative mortality 60 [n, (%)] | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
| Postoperative mortality 90 [n, (%)] | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) |
OLR, open liver resection; LLR, laparoscopic liver resection; PSM, propensity score matching; IQR, interquartile range.