Table 3 Cox regression analysis of prognostic factors influencing overall survival

Age (y)

  ≤ 60

1

-

  > 60

1.114

0.663–1.870

Gender

 Female

1

-

 Male

1.640

0.888–3.029

T stage

 T1

1

1

 T2

1.731

0.716–4.186

1.703

0.703–4.128

 T3

3.571

1.416–9.009

3.609

1.410–9.235

 T4

2.616

0.925–7.398

2.937

1.030–8.373

N stage

 N0

1

1

 N1

2.103

1.049–4.218

2.371

1.172–4.798

 N3

2.060

1.173–3.616

1.831

1.020–3.287

Grade

 G1

1

-

 G2

0.903

0.374–2.179

 G3

1.471

0.689–3.144

TNM stage

 I

1

-

 II

1.212

0.567–2.590

 III

2.235

1.156–4.320

Vessel invasion

 No

1

-

 Yes

1.306

0.753–2.266

Adjuvant therapy

 No

1

-

 Yes

0.836

0.499–1.402

Expression level of circSCAP

 Low

1

1

 High

0.585

0.353–0.970

0.636

0.380–0.984