AGT and diabetes mellitus: In multivariate analysis, the underlying history of DM, serum AGT, and BALF AGT test showed a statistical significance with an OR of underlying DM history of 3.73 (1.45–9.98, p-value 0.007, 95% CI), serum AGT of 3.11 (1.54–8.26, p-value 0.011, 95% CI), and BALF AGT of 4.80 (2.58–10.52, p-value < 0.001, 95% CI) (Table 2).