Partial Spearman correlations (Corr) of measures of insulin sensitivity and insulin/C-peptide response with participant characteristics. Correlations are adjusted for age, sex, race, and diabetes duration (excluding the variable being correlated with insulin response or sensitivity). Insulin and C-peptide responses (IGI, C-peptide index, late insulin response, and insulin clearance) are also adjusted for HOMA2-S. The gray band marks correlations that are smaller than ±0.1, and the dotted line marks the correlation of 0. Partial correlations are shown as a black dot if they are nominally significant at the 0.05 level and at least 0.1 in absolute value and as a white dot otherwise. There were no meaningful correlations with diuretics, β-blockers, calcium channel blockers, statins, or fibrates.