Table 3. Comparison Between Baseline Clinicopathological Characteristics of R-RH/ERH vs L-RH/ERH Performed Between 2015-2020 After a Center’s Learning Curve (50 Cases).
| Characteristic | No. (%) | |||||
|---|---|---|---|---|---|---|
| Unmatched cohort (n = 704) | 1:1 Propensity matched cohort (n = 316) | |||||
| R-RH/ERH (n = 158) | L-RH/ERH (n = 546) | P value | R-RH/ERH (n = 158) | L-RH/ERH (n = 158) | P value | |
| Age, median (IQR), y | 61.00 (51.00-68.75) | 61.00 (52.00-70.00) | .30 | 61.00 (51.00-68.75) | 61.00 (47.25-69.14) | .80 |
| Male | 98 (62.0) | 347 (63.7) | .71 | 98 (62.0) | 93 (58.9) | .63 |
| Female | 60 (38.0) | 199 (36.4) | 60 (38.0) | 65 (41.1) | ||
| American Society of Anesthesiologists score | ||||||
| I/II | 101 (63.9) | 406 (74.5) | .009 | 101 (63.9) | 98 (62.0) | .79 |
| III/IV | 57 (36.1) | 139 (25.5) | 57 (36.1) | 60 (38.0) | ||
| Previous abdominal surgery | 49 (31.0) | 213 (39.0) | .07 | 49 (31.0) | 42 (26.6) | .45 |
| Previous liver surgery | 7 (4.4) | 60 (11.0) | .01 | 7 (4.4) | 7 (4.4) | >.99 |
| Malignant pathology | 130 (82.3) | 483 (88.5) | .04 | 130 (82.3) | 124 (78.5) | .45 |
| Pathology type | ||||||
| HCC | 74 (46.8) | 241 (44.2) | .002 | 74 (46.8) | 71 (44.9) | .31 |
| CRM | 31 (19.6) | 177 (32.5) | 31 (19.6) | 30 (19.0) | ||
| Other | 53 (33.5) | 127 (23.3) | 53 (33.5) | 57 (36.1) | ||
| Cirrhosis | 41 (25.9) | 136 (24.9) | .79 | 41 (25.9) | 37 (23.4) | .67 |
| Child-Pugh score | ||||||
| No cirrhosis | 117 (74.1) | 410 (75.1) | .003 | 117 (74.1) | 119 (75.3) | .07 |
| A | 34 (21.5) | 133 (24.4) | 34 (21.5) | 39 (24.7) | ||
| B | 7 (4.4) | 3 (0.5) | 7 (4.4) | 0 (0.0) | ||
| Portal hypertension | 8 (5.1) | 21 (3.9) | .50 | 8 (5.1) | 3 (1.9) | .23 |
| Tumor size, median (IQR), mm | 50.00 (30.00-75.00) | 50.00 (30.00-78.00) | .63 | 50.00 (30.00-75.00) | 60.00 (33.25-80.75) | .21 |
| Multiple tumors | 39 (24.7) | 216 (39.6) | .001 | 39 (24.7) | 45 (28.5) | .47 |
| Multiple resections | 5 (3.2) | 42 (7.7) | .045 | 5 (3.2) | 4 (2.5) | >.99 |
| Concomitant operation noncholecystectomy | 26 (16.5) | 48 (8.8) | .006 | 26 (16.5) | 25 (15.8) | >.99 |
| Right hepatectomy | 154 (97.5) | 506 (92.7) | .03 | 154 (97.5) | 156 (98.7) | .68 |
| Extended right hepatectomy | 4 (2.5) | 40 (7.3) | 4 (2.5) | 2 (1.3) | ||
| Iwate score | ||||||
| Intermediate | 0 | 5 (0.9) | .32 | 0 | 2 (1.3) | .55 |
| High | 30 (19.0) | 125 (22.9) | 30 (19.0) | 27 (17.1) | ||
| Expert | 128 (81.0) | 416 (76.2) | 128 (81.0) | 129 (81.6) | ||
Abbreviations: CRM, colorectal metastases; HCC, hepatocellular carcinoma; L-RH/ERH, laparoscopic right hepatectomy/extended right hepatectomy; R-RH/ERH, robotic right hepatectomy/extended right hepatectomy.