A higher prevalence of poor glycaemic control was present among people with more than five years’ duration of diabetes (p = 0.005), insulin users (p < 0.001), those having irregular follow-up check-ups (p < 0.001), patients with a history of coronary artery diseases (CAD) (p = 0.001), and those with cognitive impairments (p < 0.001). Here, INS is linked to diabetes mellitus.