Depression (page 31)
According to an evaluation of twenty studies over the past ten years the prevalence rate of diabetics with major depression is three to four times greater than the general population. While depression affects 3-5 percent of the population at any given time, the rate is 15-20 percent in patients with diabetes a, according to the American Diabetic Association. Women in particular are at greater risk, according to other studies (Footnote 47)
...Researchers at Kaiser Permanente's Center for Health Research in Portland looked at 1,680 diabetic members....
About 84 percent diabetics also reported a higher rate of earlier depressive episodes with those in the control group...
They found that when compared with non-diabetics, those with diabetes were more likely to have been treated for depression six months before their diabetes diagnosis. About 84 percent of those diabetics also reported a high rate of earlier depressive episodes than the control group. Gregory Nichols, a Kaiser researcher who conducted the study, said the study suggest depression frequently precedes the onset of diabetes, rather than visa versa {Footnote 48}
A 2004 study in 2004 by Johns Hopkins ...11,615 initially non-diabetic adults age 48-67 over six years and found that "depressive symptoms predicted incident Type-2 diabetes." In prospective analysis, after adjusting for age, race, sex and education, individuals in the highs quartile of depressive symptoms had a 63 percent increased risk of developing diabetes compared with those in the lowest quartile .{Footnote 49}

Hi ShalHillGA,
From what I have heard in a Diabetic lecture that G. Cousens MD gave, Diabetics have more cases of "depressive incidents" than the general population. I will have to relook at his book for any more information, but I didn't want to that tidbit to slip away when I saw you question.

Hey hun, hope you have a great day!