Pathways linking periodontitis and diabetes. Abbreviations: C-reactive protein (CRP), Interleukin 6 (IL-6), Tumor necrosis factor alpha (TNF-α), Intercellular adhesion molecule 1 (ICAM-1), Vascular cell adhesion protein 1 (VCAM-1), Socioeconomic status (SES), Pocket depth (PD), Clinical attachment loss (CAL), Bleeding on probing (BOP), High-density lipoprotein cholesterol (HDL-C), Triglycerides (TD)