INS and diabetes mellitus: Increased odds of inadequate glycaemic control were found among participants with longer diabetes duration (>10 years) (OR: 1.92, 95% CI: 1.68–2.16, p < 0.001), as well as in those receiving more than one OAD (OR: 2.13, 95% CI: 1.89–2.37, p < 0.001), OADs and insulin together (OR: 4.06, 95% CI: 2.58–5.54, p < 0.001), or insulin only (OR: 2.44, 95% CI: 1.70–3.19, p < 0.001) compared with those on a single OAD.