Depression increases morality risk in Diabetics?

A new study had confirmed that depression increases diabetic chance of dying. In the study done by Zhang, from the US Centers fro Disease Control and Prevention, found that in a study of 558 diabetic and 7063 non-diabetic participants, a total 276 diabetics and 1499 non-diabetics died during the study. It just to show that depression was higher in the diabetic group – 26% to 16%. It has been found that there is a 54% greater mortality rate for those diabetics with depression to those without depression. In my opinion to this study, there could be an error due to the uneven numbers of participants for each group, even though the researchers have taken health-status factors and other details into account.

http://www.heartcenteronline.com/myheartdr/home/research-detail.cfm?reutersid=5254