Table 1. Data extraction: Characterization of the included studies.
| Author (Year) | Period of search | First and last evaluated year of the chosen studies | Sample age | Number of participants | Dental caries index | Nutrition assessment index | Presence of association |
|---|---|---|---|---|---|---|---|
| Aceves-Martins, et al.32 (2022) | 1995-2021 | 2005-2019 | 0-18 years | 17.312 | (DMFT, (DMFS, deft, ICDAS) | BMI | Inconclusive |
| Silveira, et al.31 (2022) | Up to 20th June, 2020 | 2010-2019 | 12mo-18 years | 7.542 | (Dmft, DMFT, dmfs, DMFS, deft, defs) | BMI | Inconclusive |
| Singh, et al.30(2022) | 1990-2020 | Not reported | 2-20 years | Not reported | dmft, deft | BMI | Yes |
| Alotaibi, et al.20 (2020) | 2007-2020 | 2007-2020 | mean age (8.5 years) | 6.886 | MD | BMI | Yes |
| Alshehri, et al.21 (2020) | Not reported No time of publication limit was placed | 2014-2019 | 6-17 years | 4.562 | DMFS/dmfs, DMFT/dmft, DFT, DT | BMI | Yes |
| Chanchala, et al.17 (2020) | 2009-2019 | 2007-2019 | 2.5-18 years | 45.722 | DFT/DMFT; dft/dmft | BMI | Yes |
| Manohar, et al.18 (2020) | Up to 28th February of 2019 | 2007-2016 | <6 years | 4.892 | dmft/ dmfs, defs, dfs index, ICDAS scoring method | BMI | Yes |
| Singh and Purohit23 (2020) | Up to January 2020. | 1993-2018 | 6 months-19 years | 3.246 | DMFT/dmft | BMI | Yes |
| Angelopoulou, et al.22 (2019) | Up to 2018 | 1982 - 2017 | 5 months- 6 years mean age was 4.22 years. | 21.351 | dmft/dmfs | BMI | Yes |
| Paisi, et al.24 (2019) | 1980-2014 | 1998-2014 | 0-18 years | 98.349 | DMFT/dmft, DMFS/dmfs, deft/defs | BMI | No |
| Chen, et al.10 (2018) | Up to March of 2017 | 2007-2016 | < 18 years | 43.860 | DMFT/deft; dmfs/defs | BMI | No |
| Shivakumar, et al.19 (2018) | 2005 -2016 | 2007-2015 | 2.5-17 years | 8.550 | DMFT/deft index | BMI | No |
| Li, et al.25 (2015) | Up to February of 2014 | 1995-2014 | <18 years | 11.625 | DMFT/dmft, DMFS/dmfs, DFT, DT, deft | BMI | No |
| González Martínez, et al.27 (2014) | Up to November of 2011 | 2007-2011 | 1-18 years | 23.048 | DMFT | BMI | No |
| González Muñoz26 (2013) | 2007- 2011 | 2007-2011 | 0-18 years | 46.838 | DMFT, DMFS; dmft, dmfs. | BMI | No |
| Hayden, et al.28 (2013) | 1980-2010 | 1998-2009 | <18 years | 35.251 | DFT, DMFT, DMFS, DEFT, DFES | BMI | Yes |
| Silva, et al.29(2013) | 2005-2012 | 2006-2012 | 6-20 years | 22.641 | DMFT; DMFS; dmft; dmfs | BMI | No |
| Hooley, et al.9 (2012) | 2004-2011 | 2004-2011 | 0-18 years | 75.140 | DMFT/dmft. | BMI | No |
| Kantovitz, et al.8 (2006) | 1984-2004 | 1989-2004 | 02-15 years | 10.908 | DFT/DFS; dft/dfs | BMI | No |
Legend: MD= missing data; BMI = Body mass index; DT=(number of permanent decayed teeth); DMFS/dmfs =(decayed, missing, and filled surfaces), DMFT/dmft =(decayed, missing, and filled teeth); DFT/dft = (decayed and filled teeth), dfs = (number of decayed and filled primary teeth surfaces), deft = decayed, extracted, or filled teeth ; defs = decayed, extracted, or filled surface ; decayed =(Dd), missing =(Mm), filled= (Ff) surface (Ss) or teeth (Tt) index, ECC =Early childhood caries, ICDAS = International Caries Detection and Assessment System”; International Obesity Task Force (IOTF).