INS and diabetes mellitus: Post hoc comparison using Sidak test indicated there were significantly higher HbA1c values among participants who were not taking both oral diabetes medication and insulin compared with those who were taking oral diabetes medication only (MD = 0.26, 95% CI: 0.04, 0.46), taking insulin only (MD = 0.46, 95% CI: 0.26, 0.65) and taking both oral diabetes medication and insulin (MD = 0.45, 95% CI: 0.20, 0.69).