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Table 1 Clinical and demographic characteristics of the study population

From: Anna Karenina and the subgingival microbiome associated with periodontitis

Demographic and clinical criteria CP (N = 25) GAP (N = 17) LAP (N = 17)
Age (range, median) 56–61, 59 24–32, 26 15–19, 17
Gender (% male) 72 52 54
Ethnicity (number of Caucasian to African American to Hispanic to Asian) 17:5:2:1 8:5:3:2 0:17:0:0
% bone loss/age at most affected site (range) 0.73–3.1 0.86–3.57 0.9–2.8
Probe depth at deepest site (range, median) 6–9, 6 5–8, 6 7–10, 7
Number of teeth with furcation involvement (range, median) 0–6, 2 1–3, 2 1–2, 2
Clinical attachment loss at deepest site (range, median) 7–10, 7 6–9, 7 7–10, 8
Bleeding on probing (% sites) (range, median) 20–100, 80 20–80, 65 10–40,
Molar-Incisor pattern (number of subjects) 0 0 17
Mean plaque index (Loe and Silness) (range) 1.2–2.3 1.1–2.1 0.5–0.7
Mean gingival index (Loe and Silness) (range) 1.3–2.5 0.9–2.2 0.6–0.9
Number of individuals with tooth loss 6 3 3
Number of individuals with known history of tooth loss due to periodontitis 5 2 3
Number of teeth lost/individual (excluding third molars, orthodontic reasons and congenitally missing) (range) 0–5 0–3 0–1
Number of teeth known to be lost to periodontitis/individual (range) 0–2 0–3 1