Table 4 Univariate and multivariate analysis of clinico-pathological variables and CDK9 expression using Cox proportional hazard model for recurrence-free survival

Age (years)

> 50 (vs. ≤ 50)

1.51 (1.17–1.94)

0.0013

1.33 (1.02–1.73)

0.0360

Grade

3 (vs. 1–2)

1.22 (0.87–1.69)

0.2463

pT

T3-4 (vs. T1-2)

0.85 (0.62–1.17)

0.3234

Lymph node metastasis

N1 (vs. N0)

1.31 (0.79–2.03)

0.2794

Stage

IV (vs. I-III)

2.62 (1.92–3.52)

< 0.0001

3.26 (1.52–6.96)

0.0020

CDK9

High (vs. Low)

1.38 (1.07–1.79)

0.0132

1.51 (1.15–1.98)

0.0030