The present study followed up a cohort of 662 patients
who were eligible for the conditions of this research.
These conditions are: A) the females suffering from
breast cancer whose disease was definitely diagnosed
through pathological tests, B) patients who referred
to Imam Khomeini Cancer Institute during 1990-95,
C) if the age of the patients was recorded in diagnosis
stage and entering-into-study time, D) if the patients’
vital conditions, including survival, death, or lack of
follow-up were definite, E) if the survival period or the
date of entering into and leaving the study were definite.
From among 662 patients 349 were censored, 312 died
in the above-mentioned period, and one has not been
followed up