Background: Although a positive association between type 2 diabetes and breast cancer has been reported, an association with gestational diabetes mellitus (GDM) is less clear. This study aimed to assess the relationship between the history of GDM and the incidence of BC a long term population based study. Methods: To conduct this research, 4076 women aged 20-50 years who participated in the fi...

In the present research, the difference between the quality of life of fourth-grade schoolboys in ordinary schools and those in schools of life in the city of Tehran have been studied. A descriptive, causal-comparative approach was used. The statistical population consisted of all fourth-grade elementary school students in ordinary schools and schools of life in the city of Tehran. The statisti...