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Table 3 Comparison of patient demographics and clinicopathological characteristics and their impact on OS between 2 time periods (2000 to 2010 vs 2011 to 2016)

From: Impact of multidisciplinary tumour boards (MTB) on the clinicopathological characteristics and outcomes of resected colorectal liver metastases across time

Baseline variables

2000 to 2010 unadjusted HR (95% CI)

p value

2011 to 2016 unadjusted HR (95% CI)

p value

p value*

Age at resection, years

     

 (≥ 65 vs < 65 years)

0.712 (0.482–1.051)

0.0873

0.920 (0.504–1.680)

0.7865

0.1084

Sex

     

 Male vs female

1.232 (0.866–1.752)

0.2462

1.173 (0.655–2.098)

0.5917

0.1381

ASA score

     

 [3 and 4] vs [1 and 2]

1.411 (0.937–2.124)

0.0990

0.631 (0.282–1.414)

0.2631

0.0521

CEA, ng/ml

     

 % with ≥ 200 ng/ml

1.796 (1.050–3.070)

0.0324

3.383 (1.511–7.573)

0.0030

0.1388

Primary tumour grade

     

 Poor vs well or moderate

2.417 (1.198–4.875)

0.0137

2.038 (0.639–6.504)

0.2291

0.1607

pTumour stage

     

 3 and 4 vs 1 and 2

1.929 (0.899–4.139)

0.0918

0.907 (0.387–2.125)

0.8214

0.0681

pNode stage

     

 1 and 2 vs 0

1.663 (1.065–2.595)

0.0252

2.923 (1.543–5.538)

0.0010

0.3195

Primary tumour

     

 Colon vs rectal

0.845 (0.571–1.250)

0.3998

0.899 (0.448–1.803)

0.7641

0.1671

Largest liver metastases

 ≥ 5 vs < 5 cm

1.313 (0.867–1.988)

0.1979

1.306 (0.612–2.788)

0.4907

0.2049

Distribution of liver metastases

 Bilobar vs unilobar

1.142 (0.763–1.710)

0.5185

1.608 (0.888–2.914)

0.1171

0.1347

Multiple vs solitary liver metastases

 Multiple vs solitary

1.074 (0.757–1.524)

0.6898

1.959 (1.117–3.435)

0.0190

0.0950

Synchronous vs metachronous liver metastases

 Synchronous vs metachronous

1.428 (1.010–2.019)

0.0441

1.627 (0.932–2.842)

0.0870

0.1591

Major vs minor hepatectomy

 Major vs minor

1.400 (0.990–1.981)

0.0571

1.475 (0.853–2.552)

0.1647

0.2410

Margins (R1/R2 vs R0)

 R1/R2 vs R0

1.244 (0.798–1.940)

0.3344

1.473 (0.709–3.061)

0.2990

0.1776

DFI (> 12 months vs ≤ 12 months)

 > 12 months vs ≤ 12 months

0.300 (0.184–0.4904)

< 0.0001

0.472 (0.237–0.939)

0.0327

0.0178

Neoadjuvant chemotherapy for liver metastases

 Yes vs no

1.478 (1.005–2.173)

0.0472

1.340 (0.770–2.331)

0.3002

0.2496

Adjuvant chemotherapy for liver metastases

 Yes vs no

0.790 (0.553–1.128)

0.1945

1.126 (0.647–1.959)

0.6748

0.1604

CRS liver score

     

 ≥ 3 vs < 3

1.478 (1.045–2.091)

0.0273

2.742 (1.538–4.888)

0.0006

0.2062

  1. *p value for the interaction between study period and magnitude of hazard ratio was obtained by comparing regression coefficients from the Cox model