We conducted stratified analyses based on the following factors: (1) gender (man or woman): (2) age (≤65 years, >65 years), (3) periodontitis, (4) sulphonylurea/meglitinide use, (5) metformin use, (6) TZD use, (7) insulin use, and (8) statin use. The gene discussed is INS; the disease is periodontitis.