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Table 1 Clinical case definition by the CDC/AAP working group for use in population-based surveillance studies of periodontitis

From: Periodontitis in patients with cirrhosis: a cross-sectional study

Category

Clinical attachment level (CAL)

Probing pocket depth (PD)

Severe periodontitis

≥ 2 interdental sites with CAL ≥ 6 mm (not on same tooth) and

≥ 1 interdental site with PD ≥ 5 mm

Moderate periodontitis

≥ 2 interdental sites with CAL ≥ 4 mm (not on same tooth) or

≥ 2 interdental sites with PD ≥ 5 mm (not on same tooth)

No-or-mild periodontitis

Neither “moderate” nor “severe” periodontitis