Table 1. Results of the Quality Assessment for Included Systematic Reviews Using AMSTAR Checklist, Systematic Umbrella Review of Correlation Between Prevalent Dental Conditions and Chronic Diseases, 1995–2017.
| Study (year) | 1. A Priori Design | 2. Duplicate Selection | 3. Literature Search | 4. Status of Publication | 5. List of Studies | 6. Characteristics of Studies | 7. Quality of Studies | 8. Scientific Quality | 9. Appropriate Methods | 10. Likelihood of Bias | 11. Conflict of Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Abduljabbar, Javed et al (2017) (19) | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 7 |
| Abduljabbar, Vohra et al (2017) (20) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 9 |
| Al-Hamoudi (2017) (21) | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 4 |
| Azarpazhooh and Leake (2006) (22) | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 4 |
| Batista et al (2011) (23) | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 4 |
| Botero et al (2016) (24) | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 9 |
| Dai et al (2015) (25) | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 7 |
| D'Aiuto et al (2017) (26) | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 4 |
| D'Aiuto et al (2013) (27) | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 5 |
| Dietrich et al (2017) (28) | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 3 |
| Faggion et al (2016) (29) | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 |
| Hasuike et al (2017) (30) | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 7 |
| Kelly et al (2013) (31) | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | 7 |
| Kothari et al (2017) (32) | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 5 |
| Lafon et al (2014) (33) | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 5 |
| Lam et al (2011) (34) | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 |
| Leira et al (2017) (35) | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 7 |
| Leng et al (2015) (36) | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 5 |
| Li et al (2014) (37) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 10 |
| Lira et al (2017) (38) | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 7 |
| Martin-Cabezas et al (2016) (39) | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 4 |
| Mauri-Obradors et al (2017) (40) | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 4 |
| Orlandi et al (2014) (41) | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 7 |
| Sanchez et al (2017) (42) | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 4 |
| Schmitt et al (2015) (43) | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 7 |
| Teeuw et al (2014) (44) | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 5 |
| Tonsekar et al (2017) (45) | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 6 |
| Ungprasert et al (2017) (46) | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 7 |
| Xu et al (2017) (47) | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 6 |
| Zeng, Leng et al (2016) (48) | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 6 |
| Zeng et al (2012) (49) | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 5 |
| Zeng, Xia et al (2016) (50) | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 6 |
Abbreviation: AMSTAR, Assessing the Methodological Quality of Systematic Reviews.