1. Jin LJ, Lamster IB, Greenspan JS, et al. Global burden of oral diseases: emerging concepts, management and inter- play with systemic health. Oral Dis. 2016; 22(7):609-19.
2. Papapanou PN. Systemic effects of periodontitis: lessons learned from research on atherosclerotic vascular dis- ease and adverse pregnancy outcomes. Int Dent J. 2015; 65(6):283-91.
3. Kane SF. The effects of oral health on systemic health. Gen Dent. 2017; 65(6):30-4.
4. Preshaw PM, Alba AL, Herrera D, et al. Periodontitis and diabetes: a two-way relationship. Diabetologia. 2012; 55(1): 21-31.
5. Mealey BL, Oates TW; American Academy of Periodontol- ogy. Diabetes mellitus and periodontal diseases. J Peri- odontol. 2006; 77(8):1289-303.
6. Orlandi M, Suvan J, Petrie A, et al. Association between periodontal disease and its treatment, flow-mediated dilatation and carotid intima-media thickness: a system- atic review and meta-analysis. Atherosclerosis. 2014; 236(1):39-46.
7. de Boer SP, Cheng JM, Rangé H, et al. Antibodies to peri- odontal pathogens are associated with coronary plaque remodeling but not with vulnerability or burden. Athero- sclerosis. 2014; 237(1):84-91.
8. Ide M, Harris M, Stevens A, et al. Periodontitis and cog- nitive decline in Alzheimer’s disease. PLoS One. 2016; 11(3):e0151081.
9. Hu X, Zhang J, Qiu Y, et al. Periodontal disease and the risk of Alzheimer’s disease and mild cognitive impairment: a systematic review and meta-analysis. Psychogeriatrics. 2021; 21(5):813-25.
10. Borsa L, Dubois M, Sacco G, et al. Analysis the link between periodontal diseases and Alzheimer’s disease: a systematic review. Int J Environ Res Public Health. 2021; 18(17):9312.
11. Yamane-Takeuchi M, Ekuni D, Mizutani S, et al. Associa- tions among oral health-related quality of life, subjective symptoms, clinical status, and self-rated oral health in Jap- anese university students: a cross-sectional study. BMC Oral Health. 2016; 16(1):127.
12. Islam MM, Ekuni D, Toyama N, et al. Association between sleep quality and duration and periodontal disease among university students: a cross-sectional study. Int J Environ Res Public Health. 2020; 17(9):3034.
13. Ando Y, Ishida T, Fukai K, et al. The status of routine dental visits by web-based survey in Japan (in Japanese). J Dent Hlth. 2012; 62(1):41-52.
14. Kawakita J. Hassouhou kaihan (in Japanese). 3rd ed. Tokyo: Chuokoron-Shinsha; 2018.
15. Higuchi K. A two-step approach to quantitative content analysis: KH Coder tutorial using Anne of Green Gables (Part I). Ritsumeikan Social Sciences Review. 2016; 52(3):77-91.
16. Higuchi K. A two-step approach to quantitative content analysis: KH Coder tutorial using Anne of Green Gables (Part II). Ritsumeikan Social Sciences Review. 2017; 53(1):137-47.
17. Mizutani S, Ekuni D, Furuta M, et al. Effects of self-efficacy on oral health behaviours and gingival health in univer- sity students aged 18- or 19-years-old. J Clin Periodontol. 2012; 39(9):844-9.
18. Saho H, Taniguchi-Tabata A, Ekuni D, et al. Association between household exposure to secondhand smoke and dental caries among Japanese young adults: a cross-sec- tional study. Int J Environ Res Public Health. 2020; 17(22):8623.
19. Suzuki H, Sugimoto K, Kubota-Miyazawa A, et al. A sur- vey of oral health status, subjective oral symptoms and oral health behaviors among first-year dental students at a Japanese university. J Oral Sci. 2022; 64(1):85-90.
20. Kubota A, Oki M, Kawakami Y, et al. Effectiveness of indi- vidual oral health education for Japanese university stu- dents. Int J Dent Oral Health. 2017; 3(5):244.