Table 4

Cox multivariate regression analysis: MDR-1 expression (score > 1 vs no expression).

Co-variables
Significance (p)

Sex
0,680
Age*
0,893
Death from disease
0,016
Grading*
0,627
Tumour Size*
0,842
Multicentric Pattern of Growth
0,380
Thrombosis of caval vein
0,372
Necrosis
0,378
Adjuvant Therapy
0,336

We have considered MDR-1 as state variable in correlation with different clinical and histopathological co-variables. The only significant statistical association has been noticed between MDR-1 expression and poorer prognosis (p = 0.016). MDR-1 expression seems to be a prognostic factor independent of adjuvant therapy (no significant p).

*: for these co-variables, we have fixed the different cut-off values (≤ 65 years vs > 65 years for Age, G1 vs G2–G3–G4 for Grading, ≤ 7 cm vs > 7 cm as regards Tumour Size).

Mignogna et al. BMC Cancer 2006 6:293   doi:10.1186/1471-2407-6-293