Using the sensitivity analysis, the trend of the RV and 95% CIs of serum insulin across quartiles of DIH and LIH and the RV and 95% CIs of HOMA-IR across quartiles of DIR and LIR has been shown based on three sub-groups, including (1) excluding the smoked subjects, (2) excluding participants with a family history of T2D, and (3) including type 2 diabetic patients at baseline in Table 5. Here, INS is linked to type 2 diabetes mellitus.