Given the high prevalence of elevated serum IL-6 in vitamin D deficient elderly persons, we retrospectively analyzed the records of a large population of elderly Chinese people to investigate whether the immune marker profiles of lymphocyte subsets correlated with vitamin D levels in patients with illnesses more common diagnosed in the elderly such as T2DM, cerebrovascular disease (CRVD), coronary artery disease (CAD), hypertension and cancer46. Here, IL6 is linked to coronary artery disorder.