Table 3. Oncologic Features After Propensity Score Matching by Type of Surgery.
| Variable | No. (%) | P valuea | SMD | |
|---|---|---|---|---|
| OLR (n = 106) | RLR (n = 106) | |||
| AFP, median (IQR), ng/mL | 5.9 (2.8-25.0) | 5.3 (3.3-25.6) | .66b | 0.061b |
| Maximum size, median (IQR), mm | 30 (21-45) | 35 (23-50) | .76 | 0.042 |
| No. of nodules | ||||
| 1 | 83 (78.3) | 95 (89.6) | .03 | 0.312 |
| 2-3-4 | 23 (21.7) | 11 (10.4) | ||
| Grade | ||||
| 1 | 17 (16.0) | 18 (17.0) | .002 | 0.697 |
| 2 | 71 (67.0) | 40 (37.7) | ||
| 3 | 18 (17.0) | 46 (43.4) | ||
| 4 | 0 (0.0) | 2 (1.9) | ||
| Satellitosis | ||||
| No | 84 (79.2) | 88 (83.0) | .48 | 0.097 |
| Yes | 22 (20.8) | 18 (17.0) | ||
| Microvascular invasion | ||||
| No | 46 (43.4) | 72 (67.9) | <.001 | 0.510 |
| Yes | 60 (56.6) | 34 (32.1) | ||
Abbreviations: AFP, α-fetoprotein; OLR, open liver resection; RLR, robotic liver resection; SMD, standardized mean difference.
a
t Test for continuous variables or χ2 test or Cochran-Armitage test for trend for categorical variables.
b
Evaluated on log-transformed values.