SIRT1 and periodontitis: The SIRT1 rs7895833 AG genotype was associated with a 1.8-fold increase in the odds of periodontitis development in the codominant model and a 1.7-fold increase in the overdominant model (OR = 1.753; CI = 1.154–2.661; p = 0.008; and OR = 1.724; CI = 1.138–2.614; p = 0.01, respectively).