The association between the rs35767 polymorphism near IGF1 and anemia was not affected by other confounding factors such as gender, age, smoking status, glomerular filtration rate, diagnosis of type 2 diabetes, treatment with ACE inhibitors, ARBs or diuretics, use of metformin and pioglitazone in diabetic patients. Here, IGF1 is linked to type 2 diabetes mellitus.