Our analyses showed significant genetic correlations of two spirometry indices, FEV1 and FVC with T2D (FEV1: rG = −0.19; SE = 0.03; p = 7e−12; FVC: rG = −0.22; SE = 0.03; p = 2e−14) and fasting insulin levels (FEV1: rG = −0.35; SE = 0.07; p = 3e−7; FVC: rG = −0.38; SE = 0.07; p = 3e−8) after adjusting for multiple testing (Figure 2). Here, INS is linked to type 2 diabetes mellitus.