SIRT1 and periodontitis: The analysis revealed that the SIRT1 rs3818292 AG genotype was associated with 2.4-fold increased odds of periodontitis development under the codominant and overdominant models (OR = 2.367; CI = 1.238–4.525; p = 0.009 and OR = 2.378; CI = 1.244–4.545; p = 0.009, respectively).