Table 6.

List of excluded studies

S.NO.	REFERENCE	REASONS FOR EXCLUSION
1.	Kowall B, Holtfreter B, Völzke H, Schipf S, Mundt T, Rathmann W, et al. Pre-diabetes and well-controlled diabetes are not associated with periodontal disease: the SHIP Trend Study. J Clin Periodontol 2015;42:422–30. 10.1111/jcpe.12391.	Did not satisfy the inclusion criteria set for both exposure and outcome
2.	2nd World Congress of Health Research: Viseu – Portugal, 7–8 October 2014. Aten Primaria 2014;46:ii. 10.1016/S0212-6567(14)70066-6.	Conference Proceedings (no article available, only abstract)
3.	Zielinski MB, Fedele D, Forman LJ, Pomerantz SC. Oral health in the elderly with non-insulin-dependent diabetes mellitus. Spec Care Dent Off Publ Am Assoc Hosp Dent Acad Dent Handicap Am Soc Geriatr Dent 2002;22:94–8. 10.1111/j.1754-4505.2002.tb01169.x.	Did not satisfy the inclusion criteria set for both exposure and outcome
4.	Aoyama N, Suzuki J-I, Kobayashi N, Hanatani T, Ashigaki N, Yoshida A, et al. Increased Oral P. gingivalis Prevalence in Cardiovascular Patients with Uncontrolled Diabetes Mellitus. Int Heart J 2018;59:802–7. 10.1536/ihj.17-480.	Did not satisfy the outcome criteria
5.	Azogui-Levy S, Dray-Spira R, Attal S, Hartemann A, Anagnostou F, Azerad J. Factors associated with oral health-related quality of life in patients with diabetes. Aust Dent J 2018;63:163–9. 10.1111/adj.12577.	Did not explore the exposure
6.	Botero JE, Yepes FL, Roldán N, Castrillón CA, Hincapie JP, Ochoa SP, et al. Tooth and periodontal clinical attachment loss are associated with hyperglycemia in patients with diabetes. J Periodontol 2012;83:1245–50. 10.1902/jop.2012.110681.	Did not satisfy the age criteria
7.	Castillo R, Fields A, Qureshi G, Salciccioli L, Kassotis J, Lazar JM. Relationship between aortic atherosclerosis and dental loss in an inner-city population. Angiology 2009;60:346–50. 10.1177/0003319708319783.	Did not satisfy exposure and outcome criteria in the regression analysis
8.	Hyvarinen K, Salminen A, Salomaa V, Pussinen PJ. Systemic exposure to a common periodontal pathogen and missing teeth are associated with metabolic syndrome. Acta Diabetol 2015;52:179–82. 10.1007/s00592-014-0586-y.	Did not satisfy the outcome criteria
9.	Iwasaki T, Fukuda H, Kitamura M, Kawashita Y, Hayashida H, Furugen R, et al. Association between number of pairs of opposing posterior teeth, metabolic syndrome, and obesity. ODONTOLOGY 2019;107:111–7. 10.1007/s10266-018-0386-x.	Did not satisfy the outcome criteria
10.	Kaur G, Holtfreter B, Rathmann W, Schwahn C, Wallaschofski H, Schipf S, et al. Association between type 1 and type 2 diabetes with periodontal disease and tooth loss (vol 36, pg 765, 2009). J Clin Periodontol 2009;36:1075–1075. 10.1111/j.1600-051X.2009.01483.x.	Did not satisfy the inclusion criteria set for both exposure and outcome
11.	Oliveira EJP, Rocha VFB, Nogueira DA, Pereira AA. Quality of life and oral health among hypertensive and diabetic people in a Brazilian Southeastern city. Cienc Saude Coletiva 2018;23:763–72. 10.1590/1413-81232018233.00752016.	Poorly translated and the results table did not clearly distinguish the participants who had DM
12.	Oluwagbemigun K, Dietrich T, Pischon N, Bergmann M, Boeing H. Association between Number of Teeth and Chronic Systemic Diseases: A Cohort Study Followed for 13 Years. PloS One 2015;10:e0123879. 10.1371/journal.pone.0123879.	Did not satisfy the age criteria
13.	Patel MH, Kumar JV, Moss ME. Diabetes and tooth loss: an analysis of data from the National Health and Nutrition Examination Survey, 2003–2004. J Am Dent Assoc 1939 2013;144:478–85. 10.14219/jada.archive.2013.0149.	Did not satisfy exposure and outcome criteria in the regression analysis
14.	Watanabe Y, Hirano H, Arai H, Morishita S, Ohara Y, Edahiro A, et al. Relationship Between Frailty and Oral Function in Community-Dwelling Elderly Adults. J Am Geriatr Soc 2017;65:66–76. 10.1111/jgs.14355.	Did not satisfy the inclusion criteria set for both exposure and outcome
15.	Maupome G, Gullion CM, White BA, Wyatt CCL, Williams PM. Oral disorders and chronic systemic diseases in very old adults living in institutions. Spec Care Dent Off Publ Am Assoc Hosp Dent Acad Dent Handicap Am Soc Geriatr Dent 2003;23:199–208.	Did not satisfy the inclusion criteria set for both exposure and outcome
16.	Campus G, Salem A, Uzzau S, Baldoni E, Tonolo G. Diabetes and periodontal disease: a case-control study. J Periodontol 2005;76:418–25. 10.1902/jop.2005.76.3.418.	Did not satisfy the age, exposure, and outcome criteria
17.	Aoyama N, Suzuki J-I, Kobayashi N, Hanatani T, Ashigaki N, Yoshida A, et al. Japanese Cardiovascular Disease Patients with Diabetes Mellitus Suffer Increased Tooth Loss in Comparison to Those without Diabetes Mellitus -A Cross-sectional Study. Intern Med Tokyo Jpn 2018;57:777–82. 10.2169/internalmedicine.9578-17.	Did not satisfy the inclusion criteria set for both exposure and outcome
18.	Hess G, Weber D, Kaltheuner M, Molinski M, Scheper N, Reuter HM, et al. Oral health of patients with diabetes in specialized practices in Germany: An ignored issue? Diabetes 2015;64:A690. 10.2337/db1526832798.	Conference Proceedings (no article available, only abstract)
19.	Borges-Yañez SA, Pérez RCC. Oral health related quality of life in diabetics with oral problems. Diabetes 2015;64:A386. 10.2337/db1514721800.	Conference Proceedings (no article available, only abstract)
20.	Al-Emadi A, Bissada N, Farah C, Siegel B, Al-Zaharani M. Systemic diseases among patients with and without alveolar bone loss. Quintessence Int Berl Ger 1985 2006;37:761–5.	Did not satisfy the inclusion criteria set for both exposure and outcome
21.	Thanish Ahamed S, Rajasekar A, Mathew MG. Assessment of tooth loss in chronic periodontitis patients with and without diabetes mellitus: A cross-sectional study. Int J Res Pharm Sci 2020;11:1927–31. 10.26452/ijrps.v11iSPL3.3649.	Did not satisfy the inclusion criteria set for both exposure and outcome
22.	Liljestrand JM, Salminen A, Lahdentausta L, Paju S, Mantyla P, Buhlin K, et al. Association between dental factors and mortality. Int Endod J n.d. 10.1111/iej.13458.	Did not satisfy the outcome criteria
23.	Adam HS, Zhang S, Philips K, Moss K, Wu D, Selvin E, et al. Periodontal disease is associated with risk of incident diabetes among non-obese individuals. Circulation 2020;141. 10.1161/circ.141.suppl_1.P442.	Conference Proceedings (no article available, only abstract)
24.	Wu B, Luo H. DIABETES, POOR ORAL HEALTH, AND COGNITIVE FUNCTION: FINDINGS FROM A NATIONAL SURVEY IN THE U.S. Alzheimers Dement 2019;15:P825–6. 10.1016/j.jalz.2019.06.2946.	Conference Proceedings (no article available, only abstract)
25.	Funakoshi S, Ohata Y, Fujimori K, Etoh R, Sawase K, Hashiguchi J, et al. Number of intact teeth and nutritional status are correlated in hemodialysis (HD) patients with type 2 diabetes. Diabetes 2018;67:A576.	Conference Proceedings (no article available, only abstract)