Lifetime number of years of menstruation as a risk index for mortality in postmenopausal breast cancer in the Norwegian Women and Cancer Study

Abstract

The aim of this master's thesis is to investigate the association between the Lifetime Number of Menstruation (LNYM) and mortality risk in postmenopausal women with breast cancer, utilizing data from the Norwegian Women and Cancer Study. The conclussion of the study is that there is no significant correlation with increasing lifetime number of years of menstruation and the risk of dying in postmenopausal breast cancer women.