Table 1. Comparison of baseline characteristics between LLH and OLH groups before and after PSM.
| Characteristics | Before matching | After matching | |||||
|---|---|---|---|---|---|---|---|
| LLH (n=35) | OLH (n=241) | P | LLH (n=27) | OLH (n=52) | P | ||
| Age (years) | 56.3±14.2 | 56.2±11.8 | 0.967* | 58.0±12.1 | 57.4±10.8 | 0.824* | |
| Gender, n (%) | 0.436 | 0.366 | |||||
| Male | 27 (77.1) | 199 (82.6) | 20 (74.1) | 43 (82.7) | |||
| Female | 8 (22.9) | 42 (17.4) | 7 (25.9) | 9 (17.3) | |||
| Comorbidity, n (%) | 0.281† | 0.146 | |||||
| Hypertension | 9 (25.7) | 42 (17.4) | 6 (22.2) | 9 (17.3) | |||
| Diabetes | 6 (17.1) | 18 (7.5) | 5 (18.5) | 3 (5.8) | |||
| CVA | 0 (0.0) | 6 (2.5) | 0 (0.0) | 3 (5.8) | |||
| CD | 1 (2.9) | 7 (2.9) | 0 (0.0) | 3 (5.8) | |||
| Hepatitis, n (%) | 23 (65.7) | 158 (65.6) | 0.986 | 17 (63.0) | 30 (57.7) | 0.651 | |
| PAS, n (%) | 10 (28.6) | 36 (14.9) | 0.043 | 7 (25.9) | 6 (11.5) | 0.188 | |
| Laboratory index | |||||||
| TB (μmol/L) | 11.5 (5.2–34.7) | 11.2 (3.8–192.0) | 0.684 | 11.5 (5.2–29.9) | 10.2 (4.9–38.3) | 0.249 | |
| DB (μmol/L) | 4.0 (1.1–8.6) | 4.4 (0.2–90.1) | 0.302 | 4.0 (1.1–8.6) | 4.4 (1.9–16.4) | 0.377 | |
| Albumin (g/L) | 44.0 (34.0–58.0) | 41.0 (21.0–50.0) | <0.001 | 44.0 (34.0–49.0) | 41.0 (30.0–50.0) | 0.015 | |
| ALT (U/L) | 27.0 (8.0–86.0) | 31.0 (6.0–625.0) | 0.303 | 29.0 (8.0–86.0) | 29.0 (9.0–625.0) | 0.934 | |
| AST (U/L) | 27.0 (16.0–50.0) | 31.0 (12.0–656.0) | 0.152 | 27.0 (16.0–50.0) | 28.5 (15.0–656.0) | 0.860 | |
| Hb (g/L) | 145.5±16.3 | 141.0±15.3 | 0.105* | 147.4±14.9 | 140.7±16.6 | 0.086* | |
| WBC (109/L) | 5.09 (2.64–12.39) | 5.70 (2.16–15.87) | 0.197 | 5.14 (2.64–12.39) | 5.55 (2.73–9.28) | 0.840 | |
| Platelet (109/L) | 159.0 (92.0–277.0) | 170.0 (45.0–542.0) | 0.530 | 160.0 (92.0–262.0) | 167.0 (45.0–542.0) | 0.996 | |
| PT (s) | 11.5 (9.9–12.7) | 11.7 (9.4–19.2) | 0.024 | 11.5 (9.9–12.7) | 11.5 (9.4–14.3) | 0.511 | |
| AFP (ng/mL) | 10.0 (1.0–1,717.0) | 59.2 (1.0–60,500.0) | 0.009 | 8.5 (1.0–1717.0) | 10.5 (1.0–1,580.0) | 0.804 | |
| HBV (+), n (%) | 28 (80.0) | 183 (75.9) | 0.596 | 21 (77.8) | 42 (80.8) | 0.754 | |
| Ascites, n (%) | 0 (0.0) | 7 (2.9) | 0.601† | 0 (0.0) | 2 (3.8) | 0.544† | |
*, Student’s t-test; †, Fisher’s exact test. AFP, indicates alpha-fetoprotein; ALT, alanine transaminase; AST, aspartate transaminase; CD, coronary disease; CVA, cerebrovascular accident; DB, direct bilirubin; Hb, hemoglobin; HBV, hepatitis B virus; LLH, laparoscopic left hemihepatectomy; OLH, open left hemihepatectomy; PAS, previous abdominal surgery; PSM, propensity score matching; PT, prothrombin time; TB, total bilirubin; WBC, white blood cells.