Having both breast cancer and diabetes significantly increases the chances of dying, new research shows. The researchers conducted a meta-analysis or pooled analysis of previously published studies that looked at how breast cancer patients with diabetes was. Six of the seven studies found pre-existing diabetes was significantly associated with greater long-term all-cause mortality.In particular, studies showed that breast cancer patients with diabetes were almost 50 percent more likely to die than those without diabetes. But much remains unknown, the study's authors said it was premature to conclude that prevention of diabetes and improved blood glucose control would lead to a better prognosis.
