[Temporary dependency of steroid-receptor prognostic value in breast cancer].

Background: The influence of prognostic factors in breast cancer may change during follow-up. Our aim was therefore to look for time-related changes in hazard ratios for steroid receptor status and the risk of relapse.

Patients And Method: We studied 455 patients with operable primary breast cancer during a mean follow-up period of 72 months (range, 42-130 months).