[C]onventional wisdom about Type 2 diabetes would suggest that once obesity, lack of physical activity and other lifestyle risk factors were taken into account, diabetes incidence rates would even out between lower- and higher-income groups….
[A recent study found that] for men, being in the lowest-income category (earning less than $15,000 per year), doubles the risk of developing Type 2 diabetes compared to being in one of the highest-income brackets (earning more than $80,000 per year). The risk remains the same when other risk factors are taken into account, such as education, body mass index and physical activity levels.
The findings are even more striking for women in the lowest-income category. For them, the risk of developing type 2 diabetes is more than triple the risk of women in the highest-income category. When education, body mass index and physical activity levels are taken into account, the risk is still well more than double. — CTV
Like other discussion of diabetes risk factors, this is looking at correlation. In looking at other risk factors, a family history of the disease doubles the risk as well. Other diabetes risk factors that dovetail in with “not enough money” include: stress/cortisol; depression; inadequate sleep; lack of exercise (and while some living in poverty have very physical jobs, they may not get the relaxation and stress-relief benefits that tend to go with leisure-time exercise) and while it’s probably not an official risk factor I doubt that food insecurity would help prevent diabetes.