Table 1:
Comparison of baseline clinical and surgical characteristics of patients who underwent laparoscopic left lateral sectionectomy, stratified by tumor size.
| All N = 1910 |
Tumor size ≤39mm N = 1027 |
Tumor size 40- 69mm N = 528 |
Tumor size 70- 99mm N = 212 |
Tumor size ≥100mm N = 143 |
P-value (inequality between groups)† |
|
|---|---|---|---|---|---|---|
| Median age (IQR), yrs | 61 (50–71) | 62 (53–71) | 61 (49–72) | 58 (45–68) | 54 (41–69) | <0.001 |
| Male sex, n (%) | 1124 (58.8%) | 658 (64.1%) | 289 (54.7%) | 115 (54.2%) | 62 (43.4%) | <0.001 |
| Year of surgery 2004–2012 2013–2021 |
414 (21.7%) 1496 (78.3%) |
244 (23.8%) 783 (76.2%) |
97 (17.8%) 434 (82.2%) |
48 (22.6%) 164 (77.4%) |
28 (19.6%) 115 (80.4%) |
0.049 |
| Previous abdominal surgery, n/total (%) |
555/1846 (30.1%) | 317/988 (32.1%) | 141/514 (27.4%) | 55/205 (26.8%) | 42/139 (30.2%) | 0.205 |
| Concomitant minor surgery, n (%) |
70 (3.7%) | 35 (3.4%) | 22 (4.2%) | 10 (4.7%) | 3 (2.1%) | 0.543 |
| ASA score, n/total (%) 1 2 3 4 |
285/1909 (14.9%) 1176/1909 (61.6%) 440/1909 (23.1%) 8/1909 (0.4%) |
136/1027 (13.2%) 630/1027 (61.3%) 258/1027 (25.1%) 3/1027 (0.3%) |
78/528 (14.8%) 326/528 (61.7%) 122/528 (23.1%) 2/528 (0.4%) |
47/212 (22.2%) 126/212 (59.4%) 37/212 (17.5%) 2 (0.9%) |
24/142 (16.9%) 94/142 (66.2%) 23/142 (16.2%) 1/142 (0.7%) |
0.017 |
| Malignant neoplasm, n (%) | 1512 (79.2%) | 922 (89.8%) | 387 (73.3%) | 124 (58.5%) | 79 (55.2%) | <0.001 |
| Cirrhosis, n/total (%) | 602/1909 (31.5%) | 388/1026 (37.8%) | 142/528 (26.9%) | 49/212 (23.1%) | 23/143 (16.1%) | <0.001 |
| Portal hypertension, n/total (%) | 143/1900 (7.5%) | 91/1021 (8.9%) | 37/526 (7.0%) | 14/211 (6.6%) | 1/142 (0.7%) | 0.001 |
| Median tumor size, mm (IQR) |
35 (23–58) | 25 (18–30) | 50 (41–57) | 80 (70–86) | 120 (101–131) | <0.001 |
| Multiple tumors, n (%) | 317 (16.6%) | 177 (17.2%) | 89 (16.9%) | 35 (16.5%) | 16 (11.2%) | 0.335 |
| Median Iwate difficulty score, (IQR) |
5 (4–5) | 4 (4–5) | 5 (5–6) | 5 (5–6) | 5 (5–6) | <0.001 |
| Median Iwate difficulty score excluding tumor size, (IQR) |
4 (4–5) | 4 (4–4) | 4 (4–5) | 4 (4–5) | 4 (4–5) | <0.001 |
| Iwate difficulty, n (%) Low Intermediate High Expert |
131 (6.9%) 1763 (92.3%) 16 (0.8%) 0 (0.0%) |
130 (12.7%) 891 (86.8%) 6 (0.6%) 0 (0.0%) |
1 (0.2%) 519 (98.3%) 8 (1.5%) 0 (0.0%) |
0 (0.0%) 210 (99.1%) 2 (0.9%) 0 (0.0%) |
0 (0.0%) 143 (100.0%) 0 (0.0%) 0 (0.0%) |
<0.001 |
†
Kruskal-Wallis test for continuous variables and Fisher’s exact test for categorical variables.
IQR interquartile range, ASA physical status classification system,