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. 2020 Feb 10;18:64. doi: 10.1186/s12967-020-02243-w

Table 2.

Univariate analysis of factors predicting recurrence-free and overall survival

Variable Median RFS (months) Recurrence-free survival Median
OS (months)
Overall survival
HR P (95% CI) HR P (95% CI)
Overall 15.0 17.0
Sex
 Female 13.0 1 0.336 (0.853–1.593) 16.9 1 0.270 (0.872–1.634)
 Male 15.0 1.166 17.4 1.193
Age (year)
 Less than 61 16.0 1 0.208 (0.899–1.630) 19.2 1 0.032 (1.028–1.876)
 61 or greater 13.0 1.211 16.3 1.388
Tumor site
 Intrahepatic 12.5 1 0.449 (0.664–1.199) 16.0 1 0.560 (0.680–1.232)
 Extrahepatic 16.0 0.892 18.5 0.915
Histology type
 Papillary 16.0 1 0.253 (0.884–1.599) 17.6 1 0.759 (0.779–1.409)
 Others 13.0 1.189 16.3 1.047
Primary tumor (T)
 I, II 18.0 1 < 0.001 (1.956–3.771) 22.0 1 < 0.001 (1.907–3.629)
 III, IV 9.0 2.716 11.0 2.630
Reginal lymph nodes (N) metastasis
 No 17.0 1 0.001 (1.265–2.362) 20.0 1 < 0.001 (1.442–2.704)
 Yes 10.5 1.729 13.0 1.975
Distant metastasis (M)
 No 15.0 1 0.762 (0.432–3.150) 17.0 1 0.519 (0.513–3.751)
 Yes 12.0 1.166 13.5 1.387
TNM stage
 I, II 18.0 1 < 0.001 (1.576–2.986) 21.6 1 < 0.001 (1.711–3.255)
 III, IV 10.0 2.169 12.8 2.360
Post-operative CMT
 No 15.0 1 0.933 (0.727–1.340) 16.9 1 0.556 (0.671–1.239)
 Yes 15.0 0.987 19.0 0.912
CD44
 Low 18.0 1  0.007 (1.129–2.170) 22.0 1  0.001 (1.250–2.399)
 High 13.0 1.565 16.1 1.732
CD44v6
 Neg. 17.0 1 0.001 (1.234–2.311) 19.2 1 0.006 (1.128–2.081)
 Pos. 11.0 1.689 12.8 1.532
CD44v8-10
 Neg. 16.0  1 0.007 (1.125–2.072) 20.0 1 < 0.001 (1.271–2.352)
 Pos. 13.0 1.527 14.1 1.729
CD133
 Neg. 16.0 1 0.103 (0.949–1.765) 18.1 1 0.083 (0.965–1.794)
 Pos. 12.5 1.295 16.1 1.316
EpCAM
  Low 14.0 1 0.135 (0.594–1.073) 16.3 1 0.261 (0.629–1.134)
 High 16.0 0.798 18.6 0.844
ALDH1A1
 Low 11.0 1 0.075 (0.569–1.028) 16.0 1 0.022 (0.525–0.950)
 High 17.0 0.765 19.9 0.706

TNM primary tumor-node-metastasis, post-operative, CMT post-operative chemotherapeutic treatment, HR hazard ratio, 95% CI 95% confidence interval, CD44 cluster of differentiation 44, CD44v CD44 variant, CD133 cluster of differentiation 133, EpCAM epithelial cell adhesion molecules, ALDH1A1 aldehyde dehydrogenase 1A1, TNM primary tumor-node-metastasis, Neg negative expression, Pos positive expression