SIRT1 and bronchiectasis: Furthermore, the relative telomere length [AUC: 0.62 (95% CI: 0.54–0.71)], SIRT1 [0.64 (95% CI: 0.56–0.72)], and Ku80 [0.68 (95% CI: 0.59–0.76)] modestly discriminates patients with bronchiectasis from healthy controls.