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Table 3 Univariate and multivariate analysis of pr4gression-free survival (PFS) (n = 90)

From: Retrospective study of RAS/PIK3CA/BRAF tumor mutations as predictors of response to first-line chemotherapy with bevacizumab in metastatic colorectal cancer patients

Variable

Univariate analysis

Multivariate analysis

HR (95% CI)

P value

HR (95% CI)

P value

Sex

 Male vs. female

1.0 vs. 0.72 (0.42–1.24)

0.236

  

Age

  < 63 y.o vs. ≥63 y.o

1.0 vs. 0.82 (0.48–1.40)

0.472

  

ECOG PS

 0 vs. 1,2

1.0 vs. 0.66 (0.21–2.14)

0.490

  

Site of primary tumor

 RCC vs. LCRC

1.0 vs. 0.88 (0.51–1.52)

0.643

  

Differentiated-type

 yes vs. no

1.0 vs. 1.78 (0.75–4.22)

0.188

  

Synchronous mets

 yes vs. no

1.0 vs. 0.61 (0.29–1.30)

0.201

  

Sites of metastasis

 Non-liver vs. liver

1.0 vs. 1.84 (1.06–3.20)

0.031

1.0 vs. 3.26 (1.57–6.77)

0.002

 Non-lung vs. lung

1.0 vs. 1.17 (0.68–2.00)

0.567

  

 Non-LN vs. LN

1.0 vs. 0.67 (0.37–1.20)

0.177

  

 Non-P vs. P

1.0 vs. 0.95 (0.51–1.78)

0.878

  

Number of metastases

 1 vs. ≥2

1.0 vs. 0.87 (0.51–1.50)

0.628

  

Primary resection

 yes vs. no

1.0 vs. 2.00 (1.09–3.66)

0.024

1.0 vs. 2.13 (1.05–4.29)

0.035

Prior L-OHP

 yes vs. no

1.0 vs. 0.75 (0.35–1.60)

0.457

  

ALP (/)

  ≤ ULN vs. >ULN

1.0 vs. 1.07 (0.56–2.04)

0.836

  

LDH (/IU)

  ≤ ULN vs. >ULN

1.0 vs. 1.27 (0.74–2.21)

0.387

  

CRP (mg/dl)

  ≤ ULN vs. >ULN

1.0 vs. 2.35 (1.32–4.17)

<0.001

1.0 vs. 1.57 (0.79–3.10)

0.196

CEA

  ≤ ULN vs. >ULN

1.0 vs. 0.90 (0.49–1.65)

0.735

  

CA19-9

  ≤ ULN vs. >ULN

1.0 vs. 1.63 (0.95–2.80)

0.076

  

RAS status

 Wild-type vs. mutant

1.0 vs. 1.36 (0.79–2.32)

0.264

1.0 vs. 2.01 (1.07–3.76)

0.030

PIK3CA status

 Wild-type vs. mutant

1.0 vs. 1.00 (0.36–2.77)

0.993

1.0 vs. 0.66 (0.21–2.03)

0.466

BRAF status

 Wild-type vs. mutant

1.0 vs. 1.60 (0.68–3.75)

0.285

1.0 vs. 3.87 (1.38–10.9)

0.010

  1. CI confidence interval, HR hazard ratio, RCC right-sided colon cancer, LCRC left-sided colorectal cancer, mets metastasis, LN lymph node, P peritoneum, ULN upper limit of normal, NA not assessable. All data in italics are with p-value <0.05