How/What test would one do for this data. I thought a multiple regression but I'm just getting myself confused, the aim is to determine the factors associated with mortality in this study.

The following data were collected during a multi-centre study of breast cancer patients. The question of interest is to find factors associated with mortality. The data are in the set cabreast.dta. Carry out the required analysis to find the factors associated with mortality. You could also investigate interactions if appropriate

The variables are:

inflam: degree of chronic inflammatory reaction (1=minimal ; 2=moderate-severe)

mal1: nuclear grade (1=relatively malignant appearance ; 2 = benign appearance)

died: 1=yes ; 0=survived for at least three years

age: age at diagnosis (1 = under 50 years ; 2 = 50-69 years ; 3 = 70 years or older)

centre: centre where patient diagnosed (1 = Tokyo ; 2 = Boston ; 3 = Glamorgan)

num: this gives the number of patients in each category