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Comparison of the periodontal condition among each group categorized by CKD stage (into G1–G5). Periodontal conditions were evaluated just like in Figure 1. *p < .05, **p < .01, ANOVA with Tukey HSD. NS = not significant; CPI = WHO Community Periodontal Index; OHI = Oral Hygiene Index; DM = diabetes mellitus; ANOVA = analysis of variance; HSD, honestly significant difference
