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Table 3 Distribution of periodontitis cases with respect to stage and disease activity, extent, and grade (N = 454)

From: Periodontal conditions in a 65-year-old population and prevalence of periodontitis according to three different bone level thresholds

  Non-periodontitis cases Stage I Stage II Stage III Stage IV
n (%) n (%) n (%) n (%) n (%)
Total 215 (47.4) 0 (0) 75 (16.5) 149 (32.8) 15 (3.3)
Disease activity
Periodontitis case with stable periodontal health 0 (0) 37 (8.1) 26 (5.7) 0 (0)
Periodontitis with some gingival inflammation 0 (0) 3 (0.7) 0 (0) 0 (0)
Unstable case of recurrent periodontitis 0 (0) 35 (7.7) 123 (27.1) 15 (3.3)
Extent of periodontal stage
Localized 0 (0) 5 (1.1) 138 (30.4) 0 (0)
Generalized 0 (0) 70 (15.4) 11 (2.4) 15 (3.3)
Grade
A 0 (0) 0 (0) 0 (0) 0 (0)
B 0 (0) 73 (16.1) 124 (27.3) 6 (1.3)
C 0 (0) 2 (0.4) 25 (5.5) 9 (2.0)