Table S1. Non-weighted descriptive analysis of the post-menopausal American women aged 40–80 years, NHANES III (n = 982).

Table S2. Sensitivity analysis of the association between high ferritin levels and severity and extent of periodontitis in post-menopausal women, after exclusion of women with diabetes, NHANES III (n = 876).

Table S3. Sensitivity analysis of the association between elevated transferrin saturation and severity and extent of periodontitis in post-menopausal women, after exclusion of women with diabetes, NHANES III (n = 876).

Table S4. Sensitivity analysis of the association between high ferritin levels and periodontitis stages in post-menopausal women, NHANES III (n = 982).

Table S5. Sensitivity analysis of the association between high transferrin saturation levels and periodontitis stages in post-menopausal women, NHANES III (n = 982).