Table 5 Univariate and multivariate Cox regression for overall survival in ICC patients after curative resection after PSM

Age, year

1.218

0.841–1.764

0.297

Sex, male vs female

1.006

0.703–1.440

0.973

Hepatitis, no vs yes

0.879

0.602–1.283

0.505

Child-Pugh grade,

Grade A vs Grade B

2.187

1.407–3.399

0.001

Total bilirubin, μmol/L

< 20 vs ≥20

1.325

0.927–1.895

0.123

CA199, U/mL

< 200 vs ≥200

0.814

0.53–1.249

0.346

CEA, μg/L < 5 vs ≥5

1.431

0.991–2.066

0.056

Blood loss, ml

< 800 vs ≥800

1.000

0.667–1.498

0.999

Blood transfusion,

no vs yes

0.798

0.477–1.333

0.388

Tumor diameter, cm

≤5 vs > 5

1.529

1.006–2.323

0.047

Tumor number

single vs multiple

1.215

0.848–1.740

0.289

Surgical margin width, cm < 1 vs ≥1

0.940

0.632–1.397

0.759

Satellite nodules

no vs yes

1.212

0.847–1.734

0.293

Laparoscopy

no vs yes

0.978

0.455–2.100

0.954

Differentiation

moderate or high vs poor

0.868

0.577–1.306

0.498

Major hepatectomy

no vs yes

1.526

1.014–2.297

0.043

Hepatolith no vs yes

1.213

0.592–2.486

0.598

MVI no vs yes

1.542

1.073–2.217

0.019

Postoperative hospital stay, day < 15 vs ≥15

0.894

0.624–1.282

0.542