Table 3 Univariate and multivariate analyses for early recurrence in all cases (early vs no recurrence)

ALDH1, ≤1 %/>1 %

2.468 (1.438–4.274)

0.001

2.140 (1.149–4.003)

0.016

Bilateral breast cancer absent/present

14.156 (3.932–90.478)

<0.001

16.434 (4.111–110.886)

<0.001

Age, ≤50/>50 years

0.742 (0.513–1.073)

0.113

0.748 (0.490–1.142)

0.178

Tumor size ≤20/>20 mm

3.844 (2.604–5.745)

<0.001

2.692 (1.747–4.181)

<0.001

Nodal metastasis negative/positive

4.838 (3.220–7.336)

<0.001

3.728 (2.383–5.876)

<0.001

Tumor grade 1 or 2/3

2.615 (1.666–4.128)

<0.001

2.063 (1.230–3.470)

0.006

Ki-67 staining <20 %/≥20 %

1.670 (1.076–2.586)

0.022

0.855 (0.506–1.427)

0.551