Table 3 The prognostic factors for survival in patients with ACC (multivariate Cox regression analysis)

Gender (male vs. female)

0.918

1.05

0.43–2.58

Age (years) (50+ vs. <50)

0.593

1.31

0.49–3.54

Stage of disease (III–IV vs. I-II)

0.879

1.15

0.20–6.71

Tumour weight (g) (300+ vs. <300)

0.665

1.35

0.34–5.36

Lymphatic metastasis (present vs. absent)

0.001

7.37

2.31–23.48

Distant metastases (present vs. absent)

0.491

1.82

0.33–10.09

Local infiltration (present vs. absent)

0.306

1.64

0.64–4.23

Surgical approach (extraperitoneal vs. transperitoneal)

0.381

0.55

0.15–2.09

Mitotane (used vs. not used)

0.001

0.11

0.05–0.27