Table 4. | Excluded studies |
| Study | Year of publication | Reason for rejection |
|---|---|---|
| Baiju et al. [6] | 2021 | Case report |
| Zeng et al. [9] | 2023 | Experimental laboratory study |
| Shcherba et al. [15] | 2022 | Animals study |
| Shcherba et al. [17] | 2021 | Animals study |
| Kwon et al. [21] | 2022 | History of periodontitis and CPIs did not show significant associations with histories of thyroid disease. Among 14,860 participants with no history of thyroid disorders, those with higher CPIs were more likely to have abnormal TFTs (OR = 1.381; 95% CI = 1.241 to 1.537; P < 0.0001) |
| Shcherba et al. [26] | 2019 | Animals study |
| Yetkin Ay et al. [27] | 2022 | Because of the adolescence period, which results in exaggerated host response to the dental plaque, and projected with the presence of gingivitis in the whole study population |
CPI = community periodontal index; TFT = thyroid function tests. |
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